September
September · June · May
United States · 1991–2020
September leads for comfortable weather in Keene: typically 26.2°C by day, 11.3°C at night, with 48 mm of rain. Based on measured 1991–2020 NOAA station history.
September · June · May
August · July · June
October · September · April
The weakest month is January, scoring 5 against September’s 83 — days reach only 2.9°C, 21° below the 24°C the score treats as ideal, and nights drop to -9.7°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 | 2.9°C | -9.7°C | 12 mm | 2.8 | 9 h 35 | 5 | Strong coverage |
| February | 5.2°C | -7.9°C | 14 mm | 2.9 | 10 h 36 | 5 | Strong coverage |
| March | 12.1°C | -2.9°C | 34 mm | 4.6 | 11 h 49 | 27 | Strong coverage |
| April | 17.4°C | 2.7°C | 60 mm | 6.5 | 13 h 13 | 50 | Strong coverage |
| May | 22.8°C | 9.3°C | 115 mm | 9.4 | 14 h 24 | 69 | Strong coverage |
| June | 28.7°C | 15.2°C | 99 mm | 8.3 | 15 h 02 | 70 | Strong coverage |
| July | 31.3°C | 17.9°C | 92 mm | 7.5 | 14 h 47 | 59 | Strong coverage |
| August | 29.9°C | 16.5°C | 81 mm | 6.9 | 13 h 46 | 68 | Strong coverage |
| September | 26.2°C | 11.3°C | 48 mm | 5 | 12 h 25 | 83 | Strong coverage |
| October | 19°C | 3.8°C | 54 mm | 4.7 | 11 h 03 | 59 | Strong coverage |
| November | 10.9°C | -3.2°C | 24 mm | 3.1 | 9 h 53 | 24 | Strong coverage |
| December | 4°C | -8.2°C | 17 mm | 2.5 | 9 h 18 | 5 | 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 | 25.6°C10 Jan 1990 | -33.3°C12 Jan 1912 | 38 mm28 Jan 1902 | 45 mm1902 · driest 0 mm in 1967 | 127 |
| February | 27.2°C11 Feb 1962 | -36.1°C12 Feb 1899 | 41 mm19 Feb 1971 | 73 mm1919 · driest 0 mm in 1967 | 128 |
| March | 35.0°C22 Mar 2026 | -27.2°C3 Mar 1960 | 104 mm14 Mar 2021 | 202 mm2021 · driest 0 mm in 1968 | 128 |
| April | 37.2°C28 Apr 1910 | -17.8°C3 Apr 1936 | 94 mm17 Apr 2016 | 192 mm1944 · driest 0 mm in 1989 | 128 |
| May | 40.6°C30 May 1934 | -8.3°C1 May 1909 | 111 mm12 May 2005 | 287 mm2007 · driest 3 mm in 1964 | 129 |
| June | 43.3°C21 Jun 1936 | 1.7°C21 Jun 1902 | 135 mm14 Jun 1967 | 430 mm1967 · driest 2 mm in 1978 | 130 |
| July | 47.8°C24 Jul 1936 | 5.6°C5 Jul 1915 | 107 mm27 Jul 1993 | 410 mm1993 · driest 1 mm in 1936 | 130 |
| August | 45.6°C24 Aug 1922 | 2.2°C24 Aug 1928 | 83 mm3 Aug 1985 | 211 mm1999 · driest 1 mm in 1976 | 129 |
| September | 41.7°C1 Sep 1984 | -6.7°C29 Sep 1984 | 102 mm10 Sep 1900 | 239 mm1973 · driest 0 mm in 1984 | 130 |
| October | 36.1°C5 Oct 1947 | -17.2°C27 Oct 1997 | 121 mm7 Oct 2008 | 296 mm2008 · driest 0 mm in 1988 | 129 |
| November | 27.8°C15 Nov 2025 | -26.1°C28 Nov 1976 | 51 mm16 Nov 1996 | 100 mm2024 · driest 0 mm in 1949 | 129 |
| December | 26.7°C6 Dec 1939 | -35.0°C22 Dec 1989 | 52 mm27 Dec 2018 | 128 mm1913 · driest 0 mm in 1988 | 129 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 30 | <1 | 3 |
| February | <1 | 0 | 26 | <1 | 3 |
| March | 1 | <1 | 22 | 1 | 2 |
| April | 5 | 1 | 9 | 2 | <1 |
| May | 13 | 4 | <1 | 4 | 0 |
| June | 24 | 14 | 0 | 3 | 0 |
| July | 29 | 21 | 0 | 3 | 0 |
| August | 28 | 16 | 0 | 3 | 0 |
| September | 19 | 8 | <1 | 1 | 0 |
| October | 7 | 2 | 7 | 2 | <1 |
| November | <1 | 0 | 22 | <1 | 1 |
| December | 0 | 0 | 30 | <1 | 3 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | <1% | 8% | <1% | 2% | -1.7–7.0°C |
| February | 3% | 11% | 2% | 6% | 0.2–10.6°C |
| March | 16% | 14% | 4% | 8% | 6.7–15.8°C |
| April | 37% | 20% | 8% | 17% | 14.9–20.8°C |
| May | 57% | 27% | 11% | 31% | 20.3–26.1°C |
| June | 73% | 26% | 11% | 27% | 26.2–31.7°C |
| July | 78% | 22% | 9% | 20% | 29.2–35.2°C |
| August | 79% | 21% | 8% | 17% | 28.4–33.8°C |
| September | 76% | 16% | 6% | 12% | 23.8–29.3°C |
| October | 51% | 13% | 4% | 9% | 16.5–22.6°C |
| November | 11% | 9% | 3% | 5% | 7.8–14.3°C |
| December | <1% | 8% | 1% | 3% | 0.4–7.7°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