September
September · May · June
United States · 1991–2020
September leads for comfortable weather in Cheshire Hills: typically 26.4°C by day, 14.1°C at night, with 78 mm of rain. Based on measured 1991–2020 NOAA station history.
September · May · June
August · July · June
October · April · May
The weakest month is January, scoring 5 against September’s 83 — days reach only 1.9°C, 22° below the 24°C the score treats as ideal.
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 | 1.9°C | -7.3°C | 41 mm | 5.2 | 9 h 37 | 5 | Strong coverage |
| February | 4.7°C | -5.3°C | 46 mm | 4.9 | 10 h 37 | 5 | Strong coverage |
| March | 10.9°C | 0°C | 62 mm | 6.6 | 11 h 49 | 23 | Strong coverage |
| April | 18°C | 6.2°C | 97 mm | 8.4 | 13 h 12 | 51 | Strong coverage |
| May | 23.5°C | 12.3°C | 118 mm | 9.1 | 14 h 21 | 76 | Strong coverage |
| June | 28.7°C | 17.7°C | 112 mm | 7.8 | 14 h 59 | 65 | Strong coverage |
| July | 30.6°C | 19.7°C | 93 mm | 7.3 | 14 h 44 | 58 | Strong coverage |
| August | 29.8°C | 18.7°C | 85 mm | 6 | 13 h 45 | 65 | Strong coverage |
| September | 26.4°C | 14.1°C | 78 mm | 5.1 | 12 h 24 | 83 | Strong coverage |
| October | 19.1°C | 7.4°C | 75 mm | 6.6 | 11 h 04 | 61 | Strong coverage |
| November | 11.4°C | 0.9°C | 59 mm | 6 | 9 h 55 | 27 | Strong coverage |
| December | 4.5°C | -4.4°C | 45 mm | 5.3 | 9 h 21 | 5 | Strong coverage |
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 26.1°C19 Jan 1996 | -29.4°C15 Jan 1979 | 67 mm30 Jan 1982 | 86 mm1941 · driest 2 mm in 1984 | 55 |
| February | 26.1°C28 Feb 2024 | -27.2°C9 Feb 1982 | 83 mm21 Feb 1997 | 137 mm1997 · driest 0 mm in 1947 | 56 |
| March | 32.8°C22 Mar 2026 | -24.4°C5 Mar 1978 | 49 mm15 Mar 1990 | 153 mm1945 · driest 9 mm in 2014 | 57 |
| April | 33.3°C26 Apr 1986 | -11.1°C3 Apr 2018 | 87 mm11 Apr 1944 | 211 mm1944 · driest 10 mm in 2018 | 57 |
| May | 36.7°C24 May 1939 | 0.6°C4 May 2005 | 93 mm20 May 2025 | 302 mm1991 · driest 22 mm in 2005 | 57 |
| June | 39.4°C25 Jun 1937 | 7.2°C6 Jun 1993 | 89 mm11 Jun 2026 | 293 mm2015 · driest 16 mm in 1991 | 55 |
| July | 40.6°C25 Jul 2005 | 11.1°C6 Jul 1983 | 154 mm1 Jul 1993 | 284 mm1981 · driest 5 mm in 1940 | 56 |
| August | 40.6°C27 Aug 2003 | 8.9°C30 Aug 1988 | 116 mm8 Aug 1943 | 305 mm1970 · driest 3 mm in 1947 | 58 |
| September | 39.4°C2 Sep 2011 | -1.1°C25 Sep 1937 | 100 mm24 Sep 1977 | 255 mm1977 · driest 2 mm in 1979 | 56 |
| October | 36.1°C8 Oct 1939 | -5.6°C24 Oct 1981 | 85 mm18 Oct 1946 | 238 mm1941 · driest 18 mm in 1992 | 54 |
| November | 30.6°C4 Nov 1940 | -16.1°C9 Nov 1991 | 61 mm30 Nov 2006 | 241 mm1985 · driest 3 mm in 2002 | 57 |
| December | 24.4°C16 Dec 2021 | -27.8°C26 Dec 1983 | 95 mm3 Dec 1982 | 214 mm1982 · driest 2 mm in 2017 | 55 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 26 | 1 | 2 |
| February | 0 | 0 | 22 | 2 | 2 |
| March | <1 | 0 | 16 | 2 | <1 |
| April | 5 | <1 | 3 | 3 | <1 |
| May | 13 | 3 | 0 | 4 | 0 |
| June | 24 | 12 | 0 | 4 | 0 |
| July | 28 | 18 | 0 | 3 | 0 |
| August | 28 | 15 | 0 | 3 | 0 |
| September | 18 | 8 | 0 | 2 | 0 |
| October | 7 | 1 | 2 | 3 | 0 |
| November | <1 | 0 | 14 | 2 | <1 |
| December | 0 | 0 | 24 | 2 | 1 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | <1% | 17% | 4% | 12% | -2.2–4.9°C |
| February | 2% | 18% | 5% | 14% | -0.4–8.4°C |
| March | 11% | 24% | 8% | 26% | 7.2–15.4°C |
| April | 28% | 29% | 11% | 36% | 15.2–21.1°C |
| May | 55% | 28% | 12% | 32% | 21.0–25.6°C |
| June | 71% | 26% | 12% | 29% | 26.9–30.2°C |
| July | 77% | 23% | 10% | 22% | 29.2–32.3°C |
| August | 79% | 20% | 9% | 17% | 28.0–31.9°C |
| September | 75% | 19% | 9% | 18% | 24.1–28.6°C |
| October | 42% | 21% | 8% | 20% | 17.3–22.8°C |
| November | 10% | 19% | 6% | 16% | 8.0–15.1°C |
| December | <1% | 18% | 5% | 16% | 1.2–7.9°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