September
September · May · June
United States · 1991–2020
September leads for comfortable weather in Bates Corner: typically 26.4°C by day, 12.8°C at night, with 108 mm of rain. Based on measured 1991–2020 NOAA station history.
September · May · June
July · August · June
October · April · May
The weakest month is January, scoring 5 against September’s 75 — days reach only 7°C, 17° below the 24°C the score treats as ideal, and nights drop to -5.4°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 | 7°C | -5.4°C | 71 mm | 4.4 | 9 h 54 | 5 | Strong coverage |
| February | 9.5°C | -3.5°C | 60 mm | 5.1 | 10 h 47 | 13 | Strong coverage |
| March | 14.4°C | 1.3°C | 101 mm | 6.9 | 11 h 51 | 31 | Strong coverage |
| April | 19.6°C | 5.8°C | 115 mm | 7.5 | 13 h 05 | 54 | Strong coverage |
| May | 23.8°C | 11.6°C | 148 mm | 8.2 | 14 h 06 | 73 | Strong coverage |
| June | 28.1°C | 16.4°C | 110 mm | 7.1 | 14 h 39 | 70 | Strong coverage |
| July | 30.6°C | 18.8°C | 85 mm | 6.1 | 14 h 26 | 62 | Strong coverage |
| August | 30.5°C | 17.7°C | 77 mm | 6 | 13 h 33 | 65 | Strong coverage |
| September | 26.4°C | 12.8°C | 108 mm | 5.9 | 12 h 22 | 75 | Strong coverage |
| October | 21.3°C | 6.6°C | 95 mm | 6.3 | 11 h 11 | 65 | Strong coverage |
| November | 14.4°C | 1.2°C | 84 mm | 5.7 | 10 h 10 | 34 | Strong coverage |
| December | 9.1°C | -3.4°C | 67 mm | 4.2 | 9 h 40 | 12 | Good 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°C11 Jan 1911 | -28.3°C19 Jan 1984 | 95 mm5 Jan 2005 | 200 mm2005 · driest 0 mm in 1986 | 68 |
| February | 30.0°C1 Feb 1911 | -31.1°C10 Feb 2011 | 74 mm24 Feb 2018 | 194 mm2018 · driest 3 mm in 1918 | 68 |
| March | 31.7°C23 Mar 2026 | -18.9°C2 Mar 1980 | 163 mm19 Mar 2008 | 268 mm2008 · driest 5 mm in 2013 | 68 |
| April | 33.3°C19 Apr 2006 | -8.3°C5 Apr 1987 | 98 mm24 Apr 2004 | 295 mm2025 · driest 1 mm in 2003 | 69 |
| May | 33.3°C8 May 1918 | -3.3°C1 May 1963 | 132 mm1 May 2019 | 376 mm1990 · driest 0 mm in 1994 | 67 |
| June | 38.3°C27 Jun 1918 | 2.2°C12 Jun 1913 | 152 mm19 Jun 2000 | 323 mm2019 · driest 1 mm in 2013 | 66 |
| July | 41.1°C31 Jul 1980 | 5.0°C1 Jul 1918 | 133 mm6 Jul 1993 | 235 mm1976 · driest 3 mm in 1970 | 70 |
| August | 42.2°C4 Aug 2011 | 3.9°C31 Aug 1915 | 99 mm3 Aug 1981 | 285 mm1915 · driest 2 mm in 1913 | 67 |
| September | 38.9°C4 Sep 1913 | -1.7°C29 Sep 1967 | 128 mm30 Sep 1986 | 290 mm1993 · driest 0 mm in 2004 | 67 |
| October | 35.6°C3 Oct 1919 | -9.4°C30 Oct 1913 | 159 mm9 Oct 2009 | 276 mm2009 · driest 0 mm in 1963 | 67 |
| November | 29.4°C10 Nov 2006 | -16.7°C29 Nov 1976 | 106 mm1 Nov 2004 | 273 mm1968 · driest 1 mm in 1914 | 65 |
| December | 26.7°C28 Dec 2025 | -26.1°C23 Dec 1989 | 121 mm3 Dec 1982 | 226 mm1984 · driest 0 mm in 1998 | 65 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 19 | 2 | <1 |
| February | 0 | 0 | 17 | 2 | <1 |
| March | 2 | 0 | 11 | 3 | <1 |
| April | 5 | <1 | 4 | 3 | 0 |
| May | 11 | 1 | <1 | 4 | 0 |
| June | 21 | 8 | 0 | 3 | 0 |
| July | 24 | 16 | 0 | 2 | 0 |
| August | 24 | 15 | 0 | 2 | 0 |
| September | 16 | 6 | 0 | 3 | 0 |
| October | 7 | <1 | 3 | 3 | 0 |
| November | <1 | 0 | 11 | 2 | <1 |
| December | 0 | 0 | 19 | 2 | <1 |
The best month has moved. On the 1961–1990 numbers the strongest month here was May (scoring 80); on 2011–2025 it is September (84). 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 | 3% | 16% | 6% | 13% | 3.1–10.4°C |
| February | 7% | 20% | 7% | 17% | 6.0–13.5°C |
| March | 22% | 23% | 11% | 25% | 10.9–18.1°C |
| April | 42% | 27% | 12% | 27% | 17.6–22.2°C |
| May | 61% | 28% | 15% | 33% | 21.9–25.9°C |
| June | 75% | 24% | 11% | 25% | 26.7–30.7°C |
| July | 80% | 20% | 9% | 18% | 29.3–33.2°C |
| August | 79% | 20% | 8% | 17% | 28.3–33.5°C |
| September | 73% | 21% | 10% | 21% | 24.6–29.2°C |
| October | 53% | 20% | 10% | 19% | 19.4–23.6°C |
| November | 21% | 17% | 9% | 11% | 11.6–17.7°C |
| December | 4% | 17% | 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