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Post by Cadeau on Sept 30, 2023 17:23:04 GMT -5
Record warmest September around the globe indeed. Early September here was exceptionally disgusting. Breaking previous monthly record by 1.4°C! (Counting from the 20th Century)Paris, Île-de-France, France September 2023 Average: High 26.3°C / Low 16.4°C / Mean 21.4°CHighest: 35.5°C [9th] Lowest: 8.5°C [24th] Lowest High: 17.4°C [21st,22nd] Highest Low: 21.5°C [9th] Precipitation: 39.7 mmPrecipitation Days: 6 Sunshine Hours: 206.9 hours Sunshine Percentage: 54.7% Early September: High 32.4°C / Low 19.1°C / Mean 25.7°C / Precipitation 0.2 mm / 102.8 sunshine hours Mid September: High 24.7°C / Low 16.9°C / Mean 20.8°C / Precipitation 26.4 mm / 44.7 sunshine hours Late September: High 21.9°C / Low 13.2°C / Mean 17.5°C / Precipitation 13.1 mm / 59.4 sunshine hours  - Seoul, South Korea September 2023 Average: High 27.6°C / Low 20.2°C / Mean 23.7°CHighest: 32.8°C [5th] Lowest: 15.2°C [22nd] Lowest High: 20.8°C [26th] Highest Low: 25.0°C [5th] Precipitation: 134.5 mmPrecipitation Days: 10 Snowfall: 0.0 cm Snowy Days: 0 Average Relative Humidity: 73.5% Average Wind Speed: 2.0 m/s Sunshine Hours: 157.1 hours Sunshine Percentage: 42.1% Early September: High 30.7°C / Low 21.9°C / Mean 26.2°C / Precipitation 0.4 mm / 85.0 sunshine hours Mid September: High 27.0°C / Low 21.0°C / Mean 23.7°C / Precipitation 95.5 mm / 22.5 sunshine hours Late September: High 25.1°C / Low 17.8°C / Mean 21.1°C / Precipitation 38.6 mm / 49.6 sunshine hours  *Note 1: The Warmest September since record began in 1908. (1st of 116 years)| Rank | Mean Temp | Year | | 1st | 23.7°C | 2023 | | 2nd | 23.1°C | 2016 | | 3rd | 23.0°C | 1998 | | 4th | 22.9°C | 1999 | | 5th | 22.6°C | 1975,2019,2021 | | 8th | 22.5°C | 2001 | | 9th | 22.4°C | 2015,2022 |
- Tokyo, Japan September 2023 Average: High 31.2°C / Low 23.6°C / Mean 26.7°CHighest: 34.9°C [2nd] Lowest: 18.5°C [25th] Lowest High: 24.3°C [23rd] Highest Low: 26.1°C [2nd] Precipitation: 229.0 mmPrecipitation Days: 11 Snowfall: 0 cm Snowy Days: 0 Average Relative Humidity: 80% Average Wind Speed: 2.8 m/s Sunshine Hours: 143.7 hours *(Missing 9th,10th,11th) Sunshine Percentage: 41% *((Missing 9th,10th,11th) Early September: High 31.9°C / Low 24.1°C / Mean 27.2°C / Precipitation 147.0 mm / 45.1 sunshine hours *(Missing 9th,10th) Mid September: High 32.8°C / Low 24.8°C / Mean 28.1°C / Precipitation 16.5 mm / 63.5 sunshine hours *(Missing 11th) Late September: High 28.8°C / Low 21.8°C / Mean 24.7°C / Precipitation 65.5 mm / 35.1 sunshine hours  *Note 1: The Warmest September since record began in 1875. (1st of 149 years)| Rank | Mean Temp | Year | | 1st | 26.7°C | 2023 | | 2nd | 26.2°C | 1999,2012 | | 4th | 25.6°C | 2000 | | 5th | 25.3°C | 1961 | | 6th | 25.2°C | 1975,1989,2007,2013 |
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Post by greysrigging on Sept 30, 2023 17:42:39 GMT -5
September in the NT....the first Spring month in the south and the last 'dry season' month across the Top End. And dry it has been... zero rainfall in Darwin and Alice Springs for the month. Some isolated showers were reported from some coastal sites around the Top End, especially over the East side at Gove. Been a hot month as well, with several sites breakng historical heat records. Max temps in the low 40c's are very unusual in September.  Rainfall - 0.0mm ( long term mean 16.5mm) Highest daily fall - 0.0mm Max temps - 33.7c av ( long term mean 32.7c ) Highest max - 36.4c on the 11th. Lowest max - 30.8c on the 3rd Min temps - 20.8c av ( long term mean 20.3c ) Highest min - 25.4c on the 24th. Lowest min - 19.2c on the 2nd.    Rainfall - 0.0mm falling on 0 days ( long term mean 8.8mm) Highest daily fall - 0.0mm Max temps - 30.7c av( long term mean 27.4c ) Highest max 36.4c on the 30th. Lowest max 21.0c on the 8th. Min temps - 9.7c av ( long term mean 10.3c ) Highest min 18.9c on the 21st. Lowest min 2.9c on the 12th   |
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Post by MET on Sept 30, 2023 19:02:48 GMT -5
September Summary 2023 in SE Sheffield, EnglandSeptember was much milder and much wetter than average. The first third of the month was extremely warm with a week over 25°C and year's hottest temperature over 30°C - this was accompanied by very high humidity with the dewpoint of 23°C on the warmest day of the month. But, after 11th it became very unsettled with a lot of showers or longer periods of rain. The rain was usually heavy and came to some 23 hours of rain in the month and 150% of the average rainfall. The temperatures were largely average after 11th but due to the heatwave in 3rd one it was still well above climo by 2.8°C... September was warmer than July or August. It was one of the warmest recorded.  
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Post by Benfxmth on Sept 30, 2023 19:20:05 GMT -5
Synopsis: A mixed bag. This September saw a first-class start with near-record warmth (the first time since 1983 there's been three >=95°F highs in September at the AP!) due to anomalous ridging, then the usual "non-weather" pattern for fall of high pressure to the north bringing northeasterlies settled in, with some cold overcast crap and tiny diurnals in the end. After all however, a marginally above average month is a marginally above average month, can't really complain about it otherwise.
Average 2 AM temperature: 70.1°F (21.2°C)
Average 8 AM temperature: 70.4°F (21.3°C)
Average 2 PM temperature: 80.0°F (26.7°C)
Average 8 PM temperature: 74.9°F (23.8°C)
Average 2 AM dewpoint: 67.6°F (19.8°C)
Average 8 AM dewpoint: 67.9°F (19.9°C)
Average 2 PM dewpoint: 67.1°F (19.5°C)
Average 8 PM dewpoint: 67.9°F (19.9°C)
Max. dewpoint: 81.5°F (27.5°C) on the 7th, 11:44 AM; dry-bulb temperature 86.1°F (30.1°C)
Min. dewpoint: 51.6°F (10.9°C) on the 15th, 2:55 PM; dry-bulb temperature 75.3°F (24.1°C)
Difference between true daily mean vs. max/min / 2: -0.6°F (-0.3°C)
Largest diurnal range: 25.4°F (14.1°C) on the 4th
Smallest diurnal range: 3.5°F (1.9°C) on the 23rd
Mean time of daily high and mean time of daily high after solar noon (not including highs which occurred at night): 3:32 PM; +2 hrs and 29 mins
No. precipitation days (>=0.01"): 7
No. precipitation days (>=0.04"): 5
No. precipitation days (>=0.1"): 4
No. precipitation days (>=0.4"): 3
No. precipitation days (>=1"): 3
Max. rainfall rate (1-min. avg.): 6.00"/hr (152.4 mm/hr) on the 13th, 2:21 PM
Max. rainfall rate (10-min. avg.): 4.38"/hr (111.3 mm/hr) on the 13th, 2:17-2:27 PM
Max. temperature of measurable precipitation: 77.9°F (25.5°C) on the 9th, 11:15 PM
Min. temperature of measurable precipitation: 64.5°F (18.1°C) on the 23rd, 11:15 AM
Highest barometric pressure: 30.26 in (1024.7 mb) on the 1st
Lowest barometric pressure: 29.06 in (984.1 mb) on the 23rd
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Monthly departures at New Bern ASOS (relative to 1991-2020 normals):
Average high: +1.3°F (+0.7°C; 75th percentile; 19th warmest on record)
Mean: +0.9°F (+0.5°C; 69th percentile; 23rd warmest on record)
Average low: +0.5°F (+0.3°C; 60th percentile; 29th warmest on record)
Precipitation: +0.60" (+15.2 mm; 109% of normal; 69th percentile; 22nd wettest on record)
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New/tied monthly records at New Bern ASOS:
Greatest number of >=95°F highs (3, tied with 1954 and 1983)
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Post by Deleted on Sept 30, 2023 21:07:55 GMT -5
Jakarta Soekarno-Hatta Airport. The month recorded both YTD annual hottest and coolest temps as well as both YTD annual hottest monthly average high and coolest average low. Missing data for some of the 2nd and 3rd, but no rain on both days.
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Post by paddy234 on Sept 30, 2023 23:04:39 GMT -5
Perth, Western Australia (Early Spring) 31.9523° S, 115.8613° E
Max monthly temp: 34.3°C
Min monthly temp: 5.2°C
Mean Max temp: 22.3°C (+1.8°C)
Mean Min temp: 12.1°C (+2.7°C)
Rainfall mm: 44.6mm (-43.5mm)
Rainy days >1mm: 7 days (-3.9 days)
Sunshine hours: 220.2 hours (-10.8 hours)
Relative afternoon humdity: 54%
Quite a big change this month in Perth as you can see with it being significantly warmer than average in both high and low Mean temperatures. Rainfall is Half the quantity as average with a few less rainy days. Sunshine hours is a day less than average so again I find Sunshine hours is the most consistent thing about Perth rarely being that different from average.
As you can see looking at those stats this first month of Spring would be an average mid summer in Southern England or the likes of Christchurch. Pretty impressive but I really hope these significantly higher than average mean temperatures don't continue into summer or we will suffer. I'm pretty sure most of Australia experienced warmer than average temperatures this month
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Post by tommyFL on Sept 30, 2023 23:28:26 GMT -5
September 2023 SummaryWarmer than normal (+0.6 °F/+0.3 °C/75th percentile) with near-normal precipitation (99% of average precipitation/60th percentile).     Highest daily max temp: 92.8 °F (33.8 °C) on the 17th Mean daily max temp: 88.7 °F (31.5 °C)Lowest daily max temp: 82.7 °F (28.2 °C) on the 27th Highest daily mean temp: 82.0 °F (27.8 °C) on the 12th Mean temp: 79.4 °F (26.3 °C)Lowest daily mean temp: 76.5 °F (24.7 °C) on the 23rd Highest daily min temp: 76.4 °F (24.7 °C) on the 1st Mean daily min temp: 73.4 °F (23.0 °C)Lowest daily min temp: 68.5 °F (20.3 °C) on the 23rd Highest diurnal range: 20.2 °F (11.2 °C) on the 7th Mean diurnal range: 15.3 °F (8.5 °C)Lowest diurnal range: 8.3 °F (4.6 °C) on the 27th Precipitation: 8.80" (223.5 mm)Number of days with precipitation ≥ 0.01" (0.3 mm): 16 daysHighest daily precipitaton: 2.02" (51.3 mm) on the 29th Highest precipitation rate (10-min mean): 5.10"/hr (129.5 mm/hr) on the 29th Duration of measurable precipitation: 28.8 hours (4.0% of the month)Highest temp with measurable precipitation: 88.9 °F (31.6 °C) on the 1st Mean temp of measurable precipitation: 77.1 °F (25.1 °C)Lowest temp with measurable precipitation: 71.6 °F (22.0 °C) on the 25th Highest relative humidity: 100% on 25 days Mean daily max relative humidity: 99.7%Highest daily mean relative humidity: 99.3% on the 30th Mean relative humidity: 87.9% Lowest daily mean relative humidity: 74.3% on the 3rd Mean daily min relative humidity: 65.5%Lowest relative humidity: 52% on the 7th Highest dew point: 82.6 °F (28.1 °C) on the 1st Mean daily max dew point: 78.6 °F (25.9 °C)Highest daily mean dew point: 78.9 °F (26.1 °C) on the 1st Mean dew point: 75.1 °F (23.9 °C)Lowest daily mean dew point: 69.4 °F (20.8 °C) on the 23rd Mean daily min dew point: 72.1 °F (22.3 °C)Lowest dew point: 65.9 °F (18.8 °C) on the 23rd Highest barometric pressure: 30.10 inHg (1019 mbar) on the 2nd Mean barometric pressure: 29.97 inHg (1015 mbar)Lowest barometric pressure: 29.84 inHg (1011 mbar) on the 14th Highest difference in mean temp between consecutive days: 2.8 °F (1.6 °C) between the 18th and 19th Mean daily variability (average difference in mean temp between consecutive days): 1.0 °F (0.6 °C)Observations are from 12 AM to 12 AM New September monthly records at Port Salerno 5W COOP station (1.3 mi/2.1 km SE) (since May 2002):No new monthly recordsObservations are from 7 AM to 7 AM Full period of record averages for Port Salerno 5W COOP station for reference: Sunshine hours at Martin County Emergency Operations Center for 2023 and averages since 2020 (calculated from solar radiation):  Highest daily sunshine: 88% (10.9 hours) on the 6th Lowest daily sunshine: 0% (0.0 hours) on the 16th, 19th, 26th, and 30th
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Post by Steelernation on Sept 30, 2023 23:32:19 GMT -5
September was a pretty non descript month with not much of interest happening. It was the 7th warmest but simply due to consistent several f above average and a lack of cold fronts rather than any noteworthy warmth. That said, I don’t mind boring in September, just wish it was a bit cooler. Average high: 81.3 (+3.9 f) Average low: 49.4 (+1.4 f) Mean: 65.4 (+2.7 f) —7th warmestPrecipitation: 0.67” (-0.76”, 47%) Precip days: 7 Highest temp: 94 on the 1st Lowest temp: 40 on the 25th T-6th warmestHighest low: 62 on the 2nd and 3rd Lowest high: 71 on the 11th and 15th —3rd warmestThunderstorms: 5 Here’s the month (00-00, AgMet):  And the year (7 PM-7 PM, coop):  |
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Post by jgtheone on Oct 1, 2023 2:00:26 GMT -5
Essendon September 2023 Summary:Average max: 20.6°C (+2.8°C) ← New record! Average mean: 14.8°C (+2.0°C) Average min: 8.9°C (+1.2°C) Max high: 29.4°C (30th) Max low: 17.0°C (30th) Min high: 11.5°C (8th) Min low: 3.4°C (2nd) Precipitation: 10.2mm (23.6% of avg. precip) ← New record! Precip days: 7 Precip days (>1mm): 3 Sun hours: 227.3 hrs (122.7% of avg sun hours) Highest wind gust: 81km/h from the WNW (8th) This September was record warm. The old record monthly average max was eclipsed by 1.4°C, and there were 15 days with a max of over 20°C, which I'm sure is a record for September if I bothered to look. It was also the driest September on record at Essendon and the second sunniest September on record. It basically looks like October. An insane month by all standards. Another fun fact: This September's avg monthly max is warmer than November's last year.  
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Post by firebird1988 on Oct 1, 2023 7:09:03 GMT -5
Phoenix, AZ September 2023 Summary
Temp data from KDVT with 1.1°C added to adjust for elevation difference, precip data from KPHX
Highest Temp 44.4°C
Lowest Temp 18.9°C
Minimum High 30.6°C
Maximum Low 30.6°C
Avg High 37.9°C Dep +0.4°C
Avg Low 23.9°C Dep -0.8°C
Mean Temp 30.9°C Dep -0.2°C
Total Precip 0.76 mm
Departure -14.73 mm
Five Warmest Days
I. 10th 37.2°C (43.9°C/30.6°C)
II. 9th 36.4°C (44.4°C/28.3°C)
III. 11th 34.7°C (40.6°C/28.9°C)
IV. 8th 34.4°C (42.8°C/26.1°C)
V. 7th 33.3°C (41.7°C/25°C)
Five Coolest Days
I. 1st 27.2°C (30.6°C/23.9°C)
II. 21st 27.5°C (35°C/20°C)
III. 29th 27.8°C (36.7°C/18.9°C)
IV. 20th 28.3°C (35.6°C/21.1°C)
V. 19th 28.3°C (36.1°C/20.6°C)
This September was our 6th hottest on record* (out of 128 total), and tied September 1992 for our 24th driest September on record (out of 128 total)
*At KPHX, mean temp was 32.9°C
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Post by cawfeefan on Oct 1, 2023 7:54:04 GMT -5
Scoresby September 2023 SummaryAverage high: 20.1c (+3.0c) - record! Average mean: 14.3c (+1.9c) Average low: 8.4c (+0.7c) High max: 28.5c (30th) High min: 15.6c (15th) Low max: 10.9c (8th) Low min: 1.5c (2nd) Total precip: 31.2mm (40.4% of mean) Precip days: 9 Precip days (>=1mm): 7 Sunshine hours: 227.3 September was extraordinary at the very least. We actually started off pretty average, but the rest of the month was dominated by sustained warmth. We smashed our previous monthly max in 2013 by a full degree C. It was also much drier and sunnier than average, with almost all the rain coming at the start. The heat wasn't just confined locally, but across most of Australia. In fact, it seems like quite a few places around the world had a record warm September looking at some of the other weatherboxes. An interesting fact is that the max of 10.9c on the 8th was tied for our coldest day of the year (and the coldest September day since 2009), but that pales in comparison to what happened the rest of the month. 
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Post by 🖕🏿Mörön🖕🏿 on Oct 1, 2023 8:26:04 GMT -5
Not as great as a month as the numbers would suggest. All precip days were consecutive and the first 2/3 of the month had very high humidity, which made it feel much wetter than it really was. Only interesting thing was Lee which didn't amount to much. The last 1/3 of the month was very pleasant though at least. I'll post numbers from my PWS starting with October since there's only 11 days of data for September.  |
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Post by Ariete on Oct 1, 2023 12:11:27 GMT -5
September was one of the warmest on record. Though September is usually characterised by gradually falling temperatures, this year did see nothing of that. The first 10 days had a mean of 15.8C and the last 10 a mean of 15.3C. Anecdote: on Friday the 29th I walked to the grocery store wearing shorts, which I don't think I've done before so late in September. It was a warm month all over; Sodankylä Tähtelä (67N), data since 1901, recorded its 2nd Köppen Schmöppen Dfb year ever. Glorious month!
Highest high: 23.0C (8th) Highest low: 16.4C (10th) Lowest high: 15.5C (18th) Lowest low: 2.9C (18th)
Anomalies from 91-20,
High: +2.6C Mean: +3.0C Low: +3.3C Precipitation: -12 mm (80%)
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Post by Steelernation on Oct 1, 2023 20:22:33 GMT -5
Other stats:
Median high: 81.0 (-0.3 f from mean)
Median low: 49.0 (-0.4 f from mean)
True daily mean: 65.3 (-0.1 f from mean)
Mean dew point: 44.5
Mean RH%: 53.2%
Highest dew point: 61.8 on the 3rd (16.6 c)
Lowest dew point: 17.1 on the 25th (-8.3 c)
Days with >60 f dew: 1
Mean 3 PM temp: 78.3 (25.7 c)
Mean 3 PM dew: 41.3 (5.2 c)
Mean 3 PM RH: 29.9%
Max 5 min rain rate: 0.48”/hr on the 10th
*Sunshine: 289 hours
*Sun %: 77%
*estimated from solar radiation
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Post by caspase8 on Oct 2, 2023 5:03:31 GMT -5
Average September conditions (1991-2020) Average high: 17.4°C | Daily mean: 12.3°C | Average low: 7.1°C Average precipitation: 43.4mm | Average precipitation days (>0.2mm): 15.2 | Average relative humidity: 56% As others have previously mentioned, this was an unprecedentedly warm and dry month. The average high was well above average, significantly warmer even than the October average high. It beat the previous warmest September average high by an impressive 0.9°C. The highest temperature recorded this month was 31.1°C, only 0.2°C off the September all time record high. Lows were also above average, but the anomaly was not as extreme as it was for highs. This was also by far the driest September on record, receiving less than half of the precipitation of the previous record holder (11.8mm in 2018). Despite the unprecedented warmth, the coldest low temperature recorded this month (0.9°C) was the coolest September low since 2017, and the coldest high temperature (11.6°C) was the lowest September high since 2006.
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Post by kronan2 on Oct 2, 2023 11:12:30 GMT -5
Warmest September recorded (old record 17.1C from 2006)  average high: +3.1C mean: +3.2C average low: +3.8C precipitation: -11% sunshine: -17h |
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Post by AJ1013 on Oct 2, 2023 11:24:57 GMT -5
Synopsis: Overall slightly warmer than normal but within the range of what is typical for summer here. Precip about normal as well. Nothing interesting to report as you'd expect. Larger diurnals than normal I guess. Max temp: 93F Average High: 89.7F (+2.7F) Mean: 83.2F (+1.1F) Average Low: 76.7F (-0.5F) Min temp: 72F "True Mean": 63.1F (+29.3F)  Precipitation: 7.32" (-1.12") Precipitation days: 15 (+0.5)  |
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Post by Ariete on Oct 2, 2023 12:01:08 GMT -5
Mean temp in Helsinki Centre was 15.8C, which is the warmest on record.
Kotka Haapasaari had the highest mean; 16.4C.
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Post by chesternz on Oct 3, 2023 10:59:08 GMT -5
Bangkok, Bang Na site
Maxima
Highest: 36.5 C
Mean: 33.8 C
Lowest: 31.2 C
Minima
Highest: 28.2 C
Mean: 26.1 C
Lowest: 22.6 C
Rain
Days > 1 mm: 17
Days > 10 mm: 8
Days > 20 mm: 3
Highest 24 hr total: 166 mm
Total: 447 mm
A bit wetter than usual. A lot of storms in the latter half of the month and several very long and heavy downpours.
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Post by flamingGalah on Oct 4, 2023 18:27:18 GMT -5
September was the joint warmest on record in the UK, tying with 2006. The month saw a record seven consecutive 30C+ days & also recorded the highest temperature of the year, something that has only happened in September four times since records began. For me I not only recorded my highest temperature of the year, but also my warmest minimum. The month was well above average, warmer than both July & August, with above average sunshine. Rainfall was a little above average. Stats from my PWS Av.Max 23.6C (+4.2C*) Av.Min 13.6C (+2.1C*) Mean 18.6C (+3.1C*) Highest Max 33.1C (9th) Lowest Min 5.8C (23rd) Lowest Max 17.1C (19th) Highest Min 19.6C (7th) Rainfall 72.7mm (118%*) Days with Rain 12 Days with >1.0mm 10 Days with Thunder 2 Sunshine 185.6hrs (114%*) Max UV 6 Min UV 1 Max Sea Temp 20.4C Min Sea Temp 18.3C Mean Sea Temp 19.4C *against Thorney Island 1991-2020 averages     |
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