September
September · May · June
United States · 1991–2020
September leads for comfortable weather in Vermont: typically 25.3°C by day, 12.6°C at night, with 99 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 80 — days reach only 0.8°C, 23° 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 | 0.8°C | -8.5°C | 52 mm | 4.9 | 9 h 35 | 5 | Strong coverage |
| February | 3.9°C | -6.1°C | 54 mm | 4.9 | 10 h 36 | 5 | Strong coverage |
| March | 10.3°C | -0.7°C | 62 mm | 6.2 | 11 h 49 | 20 | Strong coverage |
| April | 17.4°C | 5.4°C | 96 mm | 8.2 | 13 h 13 | 48 | Strong coverage |
| May | 22.8°C | 11.2°C | 125 mm | 8.5 | 14 h 23 | 72 | Strong coverage |
| June | 27.6°C | 16.5°C | 125 mm | 8.2 | 15 h 02 | 68 | Strong coverage |
| July | 29.5°C | 18.3°C | 99 mm | 6.2 | 14 h 46 | 64 | Good coverage |
| August | 29.1°C | 17.3°C | 94 mm | 6 | 13 h 46 | 68 | Good coverage |
| September | 25.3°C | 12.6°C | 99 mm | 5.8 | 12 h 24 | 80 | Strong coverage |
| October | 18.9°C | 6.5°C | 81 mm | 6.2 | 11 h 04 | 58 | Strong coverage |
| November | 10.8°C | 0.3°C | 71 mm | 5.8 | 9 h 53 | 22 | Strong coverage |
| December | 3.6°C | -5.3°C | 50 mm | 5 | 9 h 19 | 5 | Strong coverage |
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 23.3°C23 Jan 1909 | -29.4°C12 Jan 1918 | 89 mm19 Jan 1907 | 157 mm1965 · driest 1 mm in 1919 | 121 |
| February | 25.6°C10 Feb 1932 | -32.2°C13 Feb 1905 | 63 mm21 Feb 1997 | 106 mm1997 · driest 3 mm in 1917 | 122 |
| March | 32.2°C21 Mar 1907 | -23.9°C5 Mar 1960 | 81 mm4 Mar 1964 | 265 mm1973 · driest 3 mm in 1910 | 121 |
| April | 35.0°C28 Apr 1894 | -12.8°C5 Apr 1920 | 79 mm21 Apr 1973 | 231 mm1893 · driest 9 mm in 1932 | 119 |
| May | 40.6°C31 May 1934 | -6.1°C18 May 2002 | 126 mm20 May 1984 | 348 mm1996 · driest 7 mm in 1934 | 118 |
| June | 40.0°C27 Jun 1934 | 3.9°C12 Jun 1903 | 105 mm20 Jun 1990 | 349 mm2015 · driest 10 mm in 2016 | 117 |
| July | 45.0°C15 Jul 1936 | 5.6°C14 Jul 2007 | 132 mm18 Jul 2003 | 287 mm1981 · driest 7 mm in 1936 | 116 |
| August | 43.9°C8 Aug 1934 | 5.0°C29 Aug 1934 | 149 mm23 Aug 2001 | 218 mm1940 · driest 0 mm in 1909 | 116 |
| September | 39.4°C1 Sep 1913 | -3.3°C28 Sep 1942 | 177 mm10 Sep 2014 | 372 mm1911 · driest 0 mm in 1956 | 117 |
| October | 33.9°C7 Oct 1939 | -15.6°C30 Oct 1925 | 132 mm4 Oct 1991 | 275 mm1991 · driest 4 mm in 1964 | 120 |
| November | 28.9°C1 Nov 1950 | -22.2°C30 Nov 1964 | 67 mm18 Nov 1985 | 263 mm1985 · driest 0 mm in 1914 | 121 |
| December | 24.4°C3 Dec 1970 | -30.0°C28 Dec 1924 | 79 mm21 Dec 1949 | 184 mm2015 · driest 3 mm in 1919 | 121 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 27 | 2 | 2 |
| February | 0 | 0 | 24 | 2 | 1 |
| March | 1 | 0 | 18 | 2 | <1 |
| April | 4 | <1 | 4 | 4 | 0 |
| May | 12 | 2 | <1 | 4 | 0 |
| June | 23 | 9 | 0 | 4 | 0 |
| July | 28 | 14 | 0 | 3 | 0 |
| August | 27 | 12 | 0 | 2 | 0 |
| September | 16 | 6 | 0 | 3 | 0 |
| October | 6 | <1 | 3 | 3 | 0 |
| November | <1 | 0 | 15 | 3 | <1 |
| December | 0 | 0 | 25 | 2 | 1 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | <1% | 17% | 4% | 12% | -2.3–5.4°C |
| February | 1% | 18% | 5% | 13% | -0.5–8.1°C |
| March | 11% | 23% | 8% | 23% | 6.6–14.6°C |
| April | 28% | 28% | 12% | 34% | 14.9–21.1°C |
| May | 57% | 29% | 12% | 35% | 20.7–26.4°C |
| June | 71% | 27% | 12% | 29% | 26.0–30.9°C |
| July | 79% | 21% | 10% | 18% | 28.6–33.4°C |
| August | 79% | 20% | 10% | 17% | 27.7–32.2°C |
| September | 70% | 22% | 11% | 19% | 23.6–28.7°C |
| October | 44% | 19% | 8% | 18% | 17.1–22.0°C |
| November | 9% | 20% | 7% | 16% | 8.1–13.8°C |
| December | <1% | 18% | 6% | 14% | 0.1–6.8°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