August
August · June · July
United States · 1991–2020
August leads for comfortable weather in Amherst: typically 25.6°C by day, 12.7°C at night, with 102 mm of rain. Based on measured 1991–2020 NOAA station history.
August · June · July
July · August · June
September · May · June
The weakest month is January, scoring 5 against August’s 76 — days reach only -4.9°C, 29° 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 | -4.9°C | -14.9°C | 30 mm | 6.2 | 9 h 11 | 5 | Strong coverage |
| February | -2.3°C | -13.7°C | 29 mm | 5.3 | 10 h 22 | 5 | Strong coverage |
| March | 4.3°C | -7.5°C | 44 mm | 6.8 | 11 h 46 | 5 | Strong coverage |
| April | 12.2°C | -0.6°C | 80 mm | 9.2 | 13 h 24 | 21 | Strong coverage |
| May | 19.3°C | 6.1°C | 103 mm | 10.9 | 14 h 46 | 52 | Strong coverage |
| June | 24.4°C | 11.6°C | 114 mm | 10.6 | 15 h 31 | 75 | Strong coverage |
| July | 26.8°C | 13.6°C | 96 mm | 9.3 | 15 h 13 | 74 | Strong coverage |
| August | 25.6°C | 12.7°C | 102 mm | 8.4 | 14 h 02 | 76 | Strong coverage |
| September | 21.5°C | 8.2°C | 97 mm | 9.3 | 12 h 28 | 65 | Strong coverage |
| October | 13.7°C | 1.8°C | 78 mm | 8.5 | 10 h 54 | 31 | Strong coverage |
| November | 5.2°C | -4.5°C | 53 mm | 6.8 | 9 h 32 | 5 | Strong coverage |
| December | -1.9°C | -10.8°C | 41 mm | 6.9 | 8 h 51 | 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 | 11.7°C19 Jan 1996 | -40.6°C17 Jan 1982 | 40 mm9 Jan 2026 | 80 mm1980 · driest 1 mm in 1981 | 77 |
| February | 21.1°C28 Feb 2024 | -38.9°C3 Feb 1996 | 42 mm22 Feb 1981 | 93 mm1971 · driest 0 mm in 1964 | 77 |
| March | 26.1°C22 Mar 2012 | -36.1°C1 Mar 1962 | 58 mm16 Mar 2016 | 133 mm2016 · driest 3 mm in 1960 | 74 |
| April | 31.7°C22 Apr 1980 | -16.7°C7 Apr 1982 | 55 mm30 Apr 1984 | 146 mm1954 · driest 14 mm in 1989 | 74 |
| May | 34.4°C28 May 2018 | -9.4°C15 May 1980 | 80 mm22 May 1970 | 227 mm1970 · driest 21 mm in 1949 | 76 |
| June | 36.7°C30 Jun 1963 | -3.3°C16 Jun 1980 | 68 mm27 Jun 2021 | 215 mm1969 · driest 21 mm in 1991 | 76 |
| July | 39.4°C14 Jul 1995 | 1.7°C1 Jul 1988 | 80 mm15 Jul 2010 | 246 mm2010 · driest 27 mm in 1962 | 77 |
| August | 37.8°C24 Aug 1948 | -3.3°C20 Aug 1986 | 169 mm9 Aug 1995 | 381 mm1995 · driest 31 mm in 1976 | 76 |
| September | 37.8°C4 Sep 2023 | -7.2°C24 Sep 1989 | 79 mm23 Sep 2010 | 239 mm2010 · driest 5 mm in 1979 | 78 |
| October | 32.2°C2 Oct 1976 | -13.9°C8 Oct 1989 | 74 mm25 Oct 2023 | 183 mm2023 · driest 2 mm in 1952 | 78 |
| November | 22.8°C1 Nov 1990 | -25.6°C25 Nov 1950 | 51 mm1 Nov 1985 | 142 mm1991 · driest 0 mm in 1976 | 78 |
| December | 18.3°C3 Dec 1994 | -37.2°C21 Dec 1989 | 47 mm14 Dec 2015 | 125 mm2015 · driest 7 mm in 1993 | 79 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 31 | <1 | 7 |
| February | 0 | 0 | 27 | <1 | 5 |
| March | <1 | 0 | 27 | 1 | 4 |
| April | 1 | 0 | 18 | 3 | 2 |
| May | 6 | <1 | 3 | 3 | <1 |
| June | 14 | 3 | 0 | 4 | 0 |
| July | 21 | 6 | 0 | 3 | 0 |
| August | 19 | 4 | 0 | 3 | 0 |
| September | 9 | 1 | 2 | 3 | 0 |
| October | 1 | 0 | 13 | 3 | <1 |
| November | 0 | 0 | 24 | 2 | 4 |
| December | 0 | 0 | 30 | 1 | 7 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 0% | 18% | 2% | 14% | -7.8–-1.9°C |
| February | 0% | 17% | 3% | 14% | -4.6–1.4°C |
| March | 1% | 22% | 5% | 23% | 0.7–7.7°C |
| April | 12% | 29% | 9% | 36% | 9.3–15.8°C |
| May | 39% | 31% | 11% | 38% | 17.3–23.2°C |
| June | 61% | 34% | 12% | 42% | 22.8–27.0°C |
| July | 70% | 29% | 10% | 34% | 25.4–29.7°C |
| August | 70% | 28% | 11% | 32% | 24.2–28.2°C |
| September | 48% | 30% | 10% | 38% | 19.3–23.5°C |
| October | 17% | 25% | 7% | 28% | 11.7–18.2°C |
| November | 1% | 23% | 6% | 22% | 1.9–9.0°C |
| December | 0% | 22% | 4% | 20% | -5.2–0.9°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