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Post by Deleted on Mar 15, 2021 7:51:08 GMT -5
The way I do it is subtract the average high from the record high, multiple that by (2/3), then add the found number back onto the average high.
Example: Record high of 80 and average high of 60. 80-60=20, 20 x (2/3) = 13.3, 60 + 13.3 = 73.3, 73.3 as the mean maximum
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Post by firebird1988 on Mar 15, 2021 8:50:20 GMT -5
If you have the last 30 years of data available, just take the lowest high each day and highest high each day during the 30 year period, then do 29 day Smoothed Averages. That's most accurate.
For Phoenix today, the avg high is 78°F, the mean minimum high is 63°F and the mean maximum high is 92°F
For Riverside, the avg high today is 72°F, the mean minimum high is 58°F and the mean maximum high is 88°F
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Post by Steelernation on Mar 15, 2021 12:18:41 GMT -5
Find the average of all the highest/lowest temps for that month.
For a day it’s useless and doesn’t mean anything. Mean maximum for March 15th is 76 f, what’s that supposed to mean? It’s like finding the mean highest annual mean.
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Post by srfoskey on Mar 16, 2021 1:11:24 GMT -5
The way I do it is subtract the average high from the record high, multiple that by (2/3), then add the found number back onto the average high. Example: Record high of 80 and average high of 60. 80-60=20, 20 x (2/3) = 13.3, 60 + 13.3 = 73.3, 73.3 as the mean maximum That often works reasonably well for highs, but not always for lows.
For OKC in Feb: Average low: 32.8F Record low: -17F Avg-(Avg-record)*2/3=-0.4F Actual mean minimum: 14F |
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Post by firebird1988 on Mar 17, 2021 7:27:47 GMT -5
Find the average of all the highest/lowest temps for that month. For a day it’s useless and doesn’t mean anything. Mean maximum for March 15th is 76 f, what’s that supposed to mean? It’s like finding the mean highest annual mean. There is an actual point to it. It is a way to find how stable or unstable your climate is, and gives you an idea of when it's possible to hit certain bench marks, like when your first freeze could occur, and when your first 90°F day could occur, etc Another example, take Dallas and Las Vegas, who both have similar averages today (70/49 vs 72/50). Their smoothed extremes are MUCH different though. Dallas could have highs between 85 and 49, while Las Vegas could have highs between 86 and 58. And while Dallas could have lows between 66 and 32 today, Las Vegas could have lows between 62 and 40 |
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Post by firebird1988 on Mar 17, 2021 7:36:05 GMT -5
The way I do it is subtract the average high from the record high, multiple that by (2/3), then add the found number back onto the average high. Example: Record high of 80 and average high of 60. 80-60=20, 20 x (2/3) = 13.3, 60 + 13.3 = 73.3, 73.3 as the mean maximum That often works reasonably well for highs, but not always for lows.
For OKC in Feb: Average low: 32.8F Record low: -17F Avg-(Avg-record)*2/3=-0.4F Actual mean minimum: 14F Using 1991-2020 smoothed extremes, the mean maximum high in OKC today is 84°F, the mean minimum high is 39°F, the mean maximum low is 60°F, and the mean minimum low is 21°F |
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Post by Steelernation on Mar 17, 2021 15:42:23 GMT -5
There is an actual point to it. It is a way to find how stable or unstable your climate is, and gives you an idea of when it's possible to hit certain bench marks, like when your first freeze could occur, and when your first 90°F day could occur, etc Another example, take Dallas and Las Vegas, who both have similar averages today (70/49 vs 72/50). Their smoothed extremes are MUCH different though. Dallas could have highs between 85 and 49, while Las Vegas could have highs between 86 and 58. And while Dallas could have lows between 66 and 32 today, Las Vegas could have lows between 62 and 40 No they could have highs between the daily record high and daily record low. And the first 90 f etc, can just be easily found by the average of first/last dates. And what does the stat even mean? For a singular day, you can’t expect either temp. So is it like every 10, 15, 20 years etc. this happens? |
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Post by firebird1988 on Mar 17, 2021 17:08:47 GMT -5
There is an actual point to it. It is a way to find how stable or unstable your climate is, and gives you an idea of when it's possible to hit certain bench marks, like when your first freeze could occur, and when your first 90°F day could occur, etc Another example, take Dallas and Las Vegas, who both have similar averages today (70/49 vs 72/50). Their smoothed extremes are MUCH different though. Dallas could have highs between 85 and 49, while Las Vegas could have highs between 86 and 58. And while Dallas could have lows between 66 and 32 today, Las Vegas could have lows between 62 and 40 No they could have highs between the daily record high and daily record low. And the first 90 f etc, can just be easily found by the average of first/last dates. And what does the stat even mean? For a singular day, you can’t expect either temp. So is it like every 10, 15, 20 years etc. this happens? These aren't necessarily records. You're missing the point. It is to give you an idea of how stable or unstable the climate is. Like when people complain about OKC being considered subtropical when they can experience continental style cold or warmth due to how unstable they are |
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Post by Steelernation on Mar 17, 2021 17:43:25 GMT -5
These aren't necessarily records. You're missing the point. It is to give you an idea of how stable or unstable the climate is. Like when people complain about OKC being considered subtropical when they can experience continental style cold or warmth due to how unstable they are Guess I did miss the point. If it’s only used as a measure of stability, it’s an alright stat. Seems easier to me to just use monthly mean low max and monthly mean record high although I guess this accounts for places that simply warm up/cool down a lot over a month yet are stable. |
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Post by firebird1988 on Mar 17, 2021 19:07:07 GMT -5
These aren't necessarily records. You're missing the point. It is to give you an idea of how stable or unstable the climate is. Like when people complain about OKC being considered subtropical when they can experience continental style cold or warmth due to how unstable they are Guess I did miss the point. If it’s only used as a measure of stability, it’s an alright stat. Seems easier to me to just use monthly mean low max and monthly mean record high although I guess this accounts for places that simply warm up/cool down a lot over a month yet are stable. It changes rapidly in shoulder months though, like in Dallas, in September, the mean minimum high is 80°F on the 1st, but down to 69°F by the 30th, then down to 54°F by Halloween and only 41°F by November 30th |
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