Your criteria for an A climate

A slight update to my post from two years ago:

- A climate must have an average high of above 90°F (32°C) but below 104°F (40°C) in the warmest month.

- A climate must have an average high of above 50°F (10°C) but below 77°F (25°C) in the coldest month.

- An average low of above 65°F (18°C) but below 80°F (27°C) in the warmest month.

- For an A+ grade, a climate must have all three summer months (JJA, or DJF for SH) with average highs exceeding 90°F (32°C) and have an all-time record high above 110°F (43°C).

- All months must see at least 45% possible sunshine (if applicable, where sunshine data is available).

I'm more easygoing other than for average lows, I have dropped the precipitation and dewpoint requirements. Plentiful T-storms are helpful, but aren't important enough to detract an A-grade from climates meeting the aforementioned criteria.

True; FL, like most of the U.S. South, has a good selection of great climates. Only real flaw with them (among the factors that do determine a climate's rating) is that summer record highs aren't that interesting

All 3 winter months must have a high below 0C

All 3 summer months must have a high between 22C and 28C and a low between 12C and 18C

All winter months must average below 1 inch of rain per month.

Non winter months must have between 1.5 inch and 5 inches of rain per month

Mean maximums no higher than 37C

Must have more than 2500 sunshine hours.

Not a hard and fast rule as nowhere meets the cloudy winter requirement and something like Boulder still gets an A- despite too hot summers

-Coldest month average high 41-48 f
-March and November must have >50 f average highs
-Warmest month average high 80-85 f
-Warmest month average low 50-60 f
-Records well below/above average outside of summer
-Average dew points less than 60 every month

-Annual snowfall >50”
-Average snowfall >0.5” every month September-May
-Must average a few days with snowfall >6”
-High snowfall:snow days ratio

-Wettest month between May and August
-No more than 5” precipitation in any month other than May
-At least 8 precipitation days every month from May to August
->40 thunderstorms a year, most or all summer precipitation is thunderstorms 
-no more than 2” of precipitation October-February
-At least 0.5” of precipitation a month November to August
-Winter precipitation should be mostly snow
-At least 1 rainy day on average per month

-Summer sunshine >60% possible
-Winter sunshine <40% possible

- Average high at least 60 F (16 C) but below 104 F (40 C) in all months
- Average low at least 32 F (0 C) but below 82 F (28 C) in all months
- At least three warm months (average highs at least 80 F (27 C) and average lows at least 60 F (16 C)): JJA or JAS (Northern hemisphere), or DJF or JFM (Southern hemisphere). Preferably at least four or five.
- At least one month with an average high below 90 F (32 C). This is just to exclude certain year-round hot climates.
- Annual precipitation at least 20" (508 mm) but no more than 75" (1,905 mm)
- No extreme monsoon (>200 mm) or drought (<25 mm) months, though I might bend this if everything else is good.
- Record high at least 104 F (40 C)
- Record low at least 0 F (-18 C)
- Record lows at least 40 F (4 C) in all three of the warmest months
- Average dew point lower than 75 F (24 C) in all months
- Snowfall average no more than 5" (12.7 cm) per annum, and none outside Nov-March (NH) or May-Sep (SH).

For an A+ grade, I'm a bit stricter:
- Average high at least 70 F (21 C) but below 98 F (37 C) in all months
- Average low at least 45 F (8 C) but below 82 F (28 C) in all months
- At least four warm months: JJAS (NH) or DJFM (SH)
- At least one month with an average high below 86 F (30 C) - nice to have a mild period
- Annual precipitation at least 32" (812 mm) but no more than 72" (1,828 mm)
- Precipitation evenly distributed, ideally with about 40% more in winter than in summer
- No months with more than 180 mm or less than 35 mm
- Record high at least 110 F (43 C)
- Record low at least 32 F (0 C)
- Record low at least 60 F (16 C) in all three warmest months
- Average dew point lower than 70 F (21 C) in all months
- Snowfall average zero or negligible

Simple.... any climate where these are not required !

2024 Update

• Record high below 40°C
• Coldest month high 6~13°C
• Coldest month mean 2.5~9.5°C
• Warmest month high 22~27°C
• Warmest month mean 17.5~21.5°C
• Annual precipitation 500~1,500mm
• Wettest month less than 150mm
• Monthly precipitation less than 30mm doesn't last longer than 2 months
• Evenly distributed or slightly dry-summer precipitation pattern
• 1,600~2,500 annual sunshine hours
• Located between 30th to 60th parallel of latitude
• Minimal thunderstorm frequency

Hard to find a climate like this^^ in AU ( I've been looking )

Average summer highs between 74F and 82F
Average summer lows between 54F and 61F
Summer precip 2-4" per month with the majority coming from thunderstorms

Average winter highs between 42F and 48F
Average winter lows between 22F and 27F
Winter precip 0.5-1.5" per month with almost no rain (just snow)
Record low must be below -20F and record high above 70F

Spring/Fall: snow must occur in most Aprils/Octobers. Temps kind of take care of themselves if summer/winter qualify

Annual precip between 20" and 30"
Annual snowfall 40-85"
Sunshine between 2,000 and 2,800 hrs

Annual precip days between 70 and 100

Annual thunderstorms 40+