September
September · May · October
United States · 1991–2020
September leads for comfortable weather in Fair Play: typically 27.3°C by day, 13.8°C at night, with 109 mm of rain. Based on measured 1991–2020 NOAA station history.
September · May · October
August · July · June
October · April · September
The weakest month is January, scoring 5 against September’s 74 — days reach only 6.2°C, 18° below the 24°C the score treats as ideal, and nights drop to -5.6°C.
Month by month
The bars show the comfort score. Day and night temperatures come from daily observed highs and lows; rain is the historical monthly estimate.
| Month | Day | Night | Rain | Wet days | Daylight | Comfort | Coverage |
|---|---|---|---|---|---|---|---|
| January | 6.2°C | -5.6°C | 58 mm | 5.7 | 9 h 49 | 5 | Strong coverage |
| February | 8.7°C | -3.7°C | 59 mm | 5.9 | 10 h 44 | 10 | Strong coverage |
| March | 14.2°C | 1.2°C | 91 mm | 8.6 | 11 h 50 | 30 | Strong coverage |
| April | 19.7°C | 6.4°C | 125 mm | 8.9 | 13 h 07 | 52 | Strong coverage |
| May | 24.4°C | 12.4°C | 150 mm | 10.3 | 14 h 10 | 71 | Strong coverage |
| June | 29.1°C | 17.3°C | 125 mm | 9.3 | 14 h 45 | 61 | Strong coverage |
| July | 31.6°C | 19.5°C | 117 mm | 6.9 | 14 h 31 | 52 | Strong coverage |
| August | 31.3°C | 18.5°C | 94 mm | 6.3 | 13 h 37 | 58 | Strong coverage |
| September | 27.3°C | 13.8°C | 109 mm | 6.2 | 12 h 23 | 74 | Strong coverage |
| October | 21°C | 7°C | 97 mm | 7.2 | 11 h 09 | 63 | Strong coverage |
| November | 13.9°C | 1.3°C | 86 mm | 6.8 | 10 h 05 | 31 | Strong coverage |
| December | 8°C | -3.4°C | 68 mm | 5.9 | 9 h 34 | 7 | Strong coverage |
What has changed
Each bar compares the 2011–2025 daytime average for that month against the same month in 1961–1990, measured at the same station. Months where the older record is too thin to compare are left blank.
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 25.0°C24 Jan 1950 | -31.7°C13 Jan 1912 | 90 mm11 Jan 2020 | 198 mm1916 · driest 0 mm in 1919 | 109 |
| February | 30.0°C16 Feb 1921 | -28.3°C1 Feb 1979 | 115 mm23 Feb 1985 | 175 mm1985 · driest 0 mm in 2006 | 110 |
| March | 32.2°C21 Mar 1916 | -21.7°C7 Mar 1943 | 84 mm29 Mar 1988 | 286 mm1927 · driest 9 mm in 1956 | 110 |
| April | 33.9°C19 Apr 2006 | -8.9°C5 Apr 1920 | 117 mm30 Apr 2017 | 306 mm1994 · driest 19 mm in 1949 | 108 |
| May | 37.8°C31 May 1913 | -6.1°C7 May 1989 | 137 mm22 May 1989 | 373 mm1943 · driest 20 mm in 1951 | 108 |
| June | 40.0°C29 Jun 1952 | 3.9°C5 Jun 1921 | 148 mm17 Jun 2015 | 367 mm1928 · driest 7 mm in 1922 | 108 |
| July | 46.1°C14 Jul 1954 | 6.7°C21 Jul 1970 | 140 mm12 Jul 2000 | 411 mm1958 · driest 4 mm in 1970 | 111 |
| August | 42.2°C5 Aug 1913 | 2.2°C29 Aug 1988 | 120 mm6 Aug 2017 | 296 mm1944 · driest 0 mm in 1913 | 109 |
| September | 42.2°C4 Sep 1913 | -7.2°C24 Sep 1989 | 234 mm15 Sep 1914 | 463 mm1993 · driest 9 mm in 1952 | 111 |
| October | 36.7°C1 Oct 1910 | -8.3°C29 Oct 1910 | 123 mm10 Oct 1919 | 359 mm1919 · driest 5 mm in 1906 | 111 |
| November | 30.6°C3 Nov 1922 | -18.3°C29 Nov 1989 | 89 mm14 Nov 1985 | 260 mm1985 · driest 5 mm in 1989 | 111 |
| December | 25.0°C26 Dec 2025 | -28.3°C24 Dec 1989 | 104 mm27 Dec 2015 | 253 mm2015 · driest 3 mm in 2025 | 109 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 26 | 2 | 2 |
| February | <1 | 0 | 22 | 2 | 1 |
| March | 2 | 0 | 14 | 3 | <1 |
| April | 7 | <1 | 4 | 4 | 0 |
| May | 16 | 3 | <1 | 5 | 0 |
| June | 26 | 14 | 0 | 4 | 0 |
| July | 30 | 22 | 0 | 4 | 0 |
| August | 29 | 20 | 0 | 3 | 0 |
| September | 21 | 10 | 0 | 3 | 0 |
| October | 9 | 1 | 4 | 3 | 0 |
| November | 1 | 0 | 14 | 3 | <1 |
| December | 0 | 0 | 24 | 2 | <1 |
The best month has moved. On the 1961–1990 numbers the strongest month here was May (scoring 78); on 2011–2025 it is September (78). Both are scored the same way, from the same station — only the climate underneath changed.
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 2% | 17% | 5% | 13% | 3.4–10.0°C |
| February | 6% | 20% | 6% | 17% | 4.8–12.6°C |
| March | 22% | 25% | 10% | 27% | 10.2–18.4°C |
| April | 42% | 29% | 13% | 34% | 17.4–23.1°C |
| May | 59% | 32% | 14% | 40% | 22.3–27.2°C |
| June | 69% | 30% | 13% | 35% | 27.3–31.5°C |
| July | 79% | 21% | 9% | 18% | 29.9–34.1°C |
| August | 79% | 21% | 9% | 20% | 29.3–34.2°C |
| September | 74% | 22% | 11% | 23% | 25.3–30.7°C |
| October | 53% | 22% | 9% | 23% | 19.1–24.6°C |
| November | 18% | 20% | 8% | 17% | 11.2–16.8°C |
| December | 3% | 18% | 7% | 13% | 5.2–11.3°C |
A warm and dry day reaches 20°C with under 1 mm of rain; a wet day gets 1 mm or more; a washout gets 10 mm or more. The week column is the share of seven-day stretches in that month, across the station’s whole daily record, that contained three or more wet days — the odds a week-long trip is rained on repeatedly, counted rather than modelled. The last column is the 10th to 90th percentile of that month’s daytime average across individual years: a narrow band means the average is what you will get, a wide one means the average is a midpoint between years that felt quite different.
The evidence behind this page