September
September · June · May
United States · 1991–2020
September leads for comfortable weather in Longmeadow: typically 24.3°C by day, 12.1°C at night, with 111 mm of rain. Based on measured 1991–2020 NOAA station history.
September · June · May
July · August · June
May · September · October
The weakest month is January, scoring 5 against September’s 79 — 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 | 83 mm | 8.4 | 9 h 26 | 5 | Strong coverage |
| February | 3.6°C | -6.3°C | 79 mm | 8 | 10 h 30 | 5 | Strong coverage |
| March | 8.6°C | -2.1°C | 97 mm | 8.9 | 11 h 48 | 5 | Strong coverage |
| April | 15.9°C | 3.6°C | 98 mm | 9 | 13 h 17 | 38 | Strong coverage |
| May | 22.1°C | 9.1°C | 96 mm | 9.5 | 14 h 32 | 69 | Strong coverage |
| June | 26.7°C | 14.3°C | 109 mm | 9.3 | 15 h 13 | 74 | Strong coverage |
| July | 29.6°C | 17.5°C | 106 mm | 8.7 | 14 h 57 | 62 | Strong coverage |
| August | 28.6°C | 16.5°C | 107 mm | 8.2 | 13 h 52 | 67 | Strong coverage |
| September | 24.3°C | 12.1°C | 111 mm | 7.1 | 12 h 26 | 79 | Strong coverage |
| October | 17.6°C | 5.8°C | 115 mm | 8.3 | 11 h | 46 | Strong coverage |
| November | 10.9°C | 0.6°C | 89 mm | 7.6 | 9 h 45 | 19 | Strong coverage |
| December | 4.8°C | -4.1°C | 104 mm | 9.2 | 9 h 08 | 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 | 22.2°C6 Jan 2007 | -32.2°C22 Jan 1961 | 62 mm24 Jan 2019 | 244 mm1978 · driest 10 mm in 1981 | 78 |
| February | 25.0°C21 Feb 2018 | -29.4°C2 Feb 1961 | 64 mm13 Feb 2008 | 226 mm2008 · driest 11 mm in 1987 | 78 |
| March | 31.7°C31 Mar 1998 | -22.2°C4 Mar 1950 | 64 mm31 Mar 1987 | 240 mm1953 · driest 7 mm in 1981 | 78 |
| April | 35.6°C14 Apr 2023 | -12.8°C1 Apr 1970 | 82 mm15 Apr 2007 | 251 mm1983 · driest 28 mm in 1999 | 78 |
| May | 37.2°C26 May 2010 | -2.2°C4 May 1985 | 122 mm24 May 1989 | 305 mm1989 · driest 19 mm in 1959 | 78 |
| June | 38.3°C26 Jun 1952 | 2.8°C6 Jun 1964 | 149 mm5 Jun 1982 | 346 mm1982 · driest 7 mm in 1949 | 78 |
| July | 39.4°C22 Jul 2011 | 6.7°C2 Jul 1962 | 84 mm15 Jul 2005 | 354 mm2023 · driest 25 mm in 2001 | 78 |
| August | 38.9°C9 Aug 2001 | 2.2°C31 Aug 1965 | 196 mm19 Aug 1955 | 556 mm1955 · driest 14 mm in 1981 | 77 |
| September | 38.3°C2 Sep 1953 | -2.8°C30 Sep 1951 | 145 mm16 Sep 1999 | 309 mm2023 · driest 17 mm in 2024 | 77 |
| October | 32.8°C7 Oct 1963 | -8.3°C18 Oct 1978 | 134 mm14 Oct 2005 | 415 mm2005 · driest 9 mm in 1963 | 77 |
| November | 28.9°C1 Nov 2024 | -17.2°C24 Nov 1989 | 85 mm22 Nov 1952 | 217 mm1972 · driest 10 mm in 2012 | 77 |
| December | 24.4°C7 Dec 1998 | -25.6°C26 Dec 1980 | 85 mm12 Dec 2010 | 212 mm1969 · driest 20 mm in 1955 | 77 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 27 | 3 | 6 |
| February | 0 | 0 | 25 | 3 | 6 |
| March | <1 | 0 | 21 | 4 | 4 |
| April | 3 | <1 | 7 | 3 | <1 |
| May | 10 | 3 | <1 | 3 | 0 |
| June | 21 | 8 | 0 | 4 | 0 |
| July | 28 | 16 | 0 | 3 | 0 |
| August | 27 | 12 | 0 | 4 | 0 |
| September | 14 | 3 | <1 | 4 | 0 |
| October | 3 | <1 | 4 | 4 | <1 |
| November | <1 | 0 | 15 | 3 | <1 |
| December | 0 | 0 | 25 | 4 | 4 |
The best month has moved. On the 1961–1990 numbers the strongest month here was September (scoring 84); on 2011–2025 it is June (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 | 0% | 28% | 10% | 33% | -2.0–4.6°C |
| February | <1% | 28% | 9% | 32% | 0.4–6.6°C |
| March | 4% | 29% | 11% | 35% | 5.5–11.6°C |
| April | 21% | 30% | 10% | 38% | 13.6–17.8°C |
| May | 53% | 31% | 10% | 38% | 19.6–24.7°C |
| June | 68% | 30% | 10% | 34% | 24.9–28.5°C |
| July | 73% | 27% | 11% | 28% | 27.6–31.4°C |
| August | 74% | 26% | 10% | 24% | 26.8–29.9°C |
| September | 65% | 24% | 11% | 23% | 22.3–25.7°C |
| October | 28% | 24% | 10% | 24% | 15.5–19.9°C |
| November | 4% | 27% | 11% | 30% | 8.3–13.3°C |
| December | <1% | 30% | 11% | 37% | 0.9–7.4°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