September
September · May · October
United States · 1991–2020
September leads for comfortable weather in Charters Corner: typically 27.9°C by day, 14.3°C at night, with 51 mm of rain. Based on measured 1991–2020 NOAA station history.
September · May · October
September · July · August
October · April · September
The weakest month is January, scoring 5 against September’s 82 — days reach only 5.6°C, 18° below the 24°C the score treats as ideal, and nights drop to -6.7°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 | 5.6°C | -6.7°C | 21 mm | 3.2 | 9 h 47 | 5 | Strong coverage |
| February | 8°C | -5°C | 24 mm | 3.2 | 10 h 43 | 11 | Strong coverage |
| March | 13.9°C | 0.1°C | 50 mm | 5.2 | 11 h 50 | 36 | Strong coverage |
| April | 19.3°C | 5.2°C | 61 mm | 6.2 | 13 h 08 | 60 | Strong coverage |
| May | 24.8°C | 11.7°C | 120 mm | 7.8 | 14 h 12 | 75 | Strong coverage |
| June | 31°C | 17.6°C | 103 mm | 6.8 | 14 h 47 | 59 | Strong coverage |
| July | 33.6°C | 20.3°C | 95 mm | 6.8 | 14 h 34 | 47 | Strong coverage |
| August | 32.4°C | 19.2°C | 97 mm | 6.5 | 13 h 38 | 53 | Strong coverage |
| September | 27.9°C | 14.3°C | 51 mm | 4.8 | 12 h 23 | 82 | Strong coverage |
| October | 20.9°C | 6.8°C | 63 mm | 4.9 | 11 h 08 | 69 | Strong coverage |
| November | 13.1°C | -0.2°C | 27 mm | 3 | 10 h 04 | 37 | Strong coverage |
| December | 6.5°C | -5.2°C | 27 mm | 3.2 | 9 h 32 | 6 | 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 | 27.8°C10 Jan 1990 | -25.6°C24 Jan 1894 | 45 mm16 Jan 2017 | 76 mm2000 · driest 0 mm in 1893 | 76 |
| February | 28.9°C9 Feb 1976 | -25.0°C8 Feb 1971 | 56 mm24 Feb 2020 | 99 mm1971 · driest 0 mm in 1996 | 76 |
| March | 35.6°C22 Mar 2026 | -22.2°C3 Mar 1960 | 89 mm23 Mar 1987 | 224 mm1973 · driest 0 mm in 1997 | 76 |
| April | 38.9°C23 Apr 1989 | -8.9°C7 Apr 2018 | 71 mm11 Apr 1967 | 156 mm2009 · driest 2 mm in 1893 | 76 |
| May | 39.4°C25 May 1953 | -2.2°C14 May 1953 | 125 mm30 May 2013 | 362 mm2019 · driest 11 mm in 1966 | 76 |
| June | 44.4°C27 Jun 1980 | 5.0°C4 Jun 1954 | 144 mm13 Jun 2010 | 285 mm1957 · driest 9 mm in 1996 | 75 |
| July | 44.4°C28 Jul 2011 | 9.4°C14 Jul 1990 | 87 mm1 Jul 1982 | 230 mm1993 · driest 4 mm in 1983 | 76 |
| August | 43.3°C28 Aug 1984 | 6.7°C31 Aug 1978 | 183 mm12 Aug 2002 | 290 mm2002 · driest 1 mm in 2000 | 74 |
| September | 41.7°C2 Sep 2011 | -1.1°C30 Sep 1985 | 123 mm17 Sep 1978 | 326 mm1973 · driest 0 mm in 1980 | 74 |
| October | 36.1°C9 Oct 1893 | -10.0°C31 Oct 2019 | 95 mm30 Oct 1979 | 232 mm2018 · driest 0 mm in 1893 | 74 |
| November | 31.7°C8 Nov 1980 | -16.7°C16 Nov 1955 | 100 mm16 Nov 1996 | 138 mm1964 · driest 0 mm in 1965 | 74 |
| December | 26.7°C24 Dec 1955 | -27.8°C22 Dec 1989 | 58 mm15 Dec 1984 | 93 mm1984 · driest 0 mm in 2025 | 75 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 29 | <1 | 1 |
| February | <1 | 0 | 23 | <1 | 2 |
| March | 2 | <1 | 16 | 2 | <1 |
| April | 7 | 2 | 5 | 2 | <1 |
| May | 17 | 6 | <1 | 4 | 0 |
| June | 27 | 19 | 0 | 3 | 0 |
| July | 30 | 25 | 0 | 3 | 0 |
| August | 30 | 22 | 0 | 3 | 0 |
| September | 22 | 12 | <1 | 2 | 0 |
| October | 9 | 2 | 3 | 2 | <1 |
| November | 1 | 0 | 16 | <1 | <1 |
| December | 0 | 0 | 27 | <1 | 1 |
The best month has moved. On the 1961–1990 numbers the strongest month here was May (scoring 83); on 2011–2025 it is September (81). 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% | 10% | 2% | 6% | 1.7–9.0°C |
| February | 8% | 11% | 3% | 7% | 3.0–13.2°C |
| March | 23% | 17% | 6% | 16% | 10.0–18.0°C |
| April | 46% | 19% | 6% | 17% | 16.5–23.0°C |
| May | 65% | 26% | 11% | 30% | 22.5–27.2°C |
| June | 75% | 25% | 11% | 26% | 28.8–33.2°C |
| July | 79% | 21% | 8% | 18% | 31.7–36.4°C |
| August | 80% | 20% | 8% | 17% | 30.1–35.4°C |
| September | 78% | 17% | 6% | 15% | 25.5–30.8°C |
| October | 57% | 15% | 6% | 12% | 18.4–24.1°C |
| November | 18% | 11% | 4% | 7% | 10.0–16.3°C |
| December | 2% | 10% | 2% | 6% | 4.0–10.0°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