September
September · August · May
United States · 1991–2020
September leads for comfortable weather in Summitville: typically 25.2°C by day, 11.2°C at night, with 89 mm of rain. Based on measured 1991–2020 NOAA station history.
September · August · May
July · August · June
October · May · September
The weakest month is January, scoring 5 against September’s 78 — days reach only 1°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 | 1°C | -8°C | 84 mm | 9 | 9 h 35 | 5 | Good coverage |
| February | 3.6°C | -6.1°C | 55 mm | 6 | 10 h 36 | 5 | Good coverage |
| March | 10.1°C | -1.5°C | 70 mm | 8 | 11 h 49 | 15 | Good coverage |
| April | 17°C | 4°C | 108 mm | 9.4 | 13 h 13 | 41 | Good coverage |
| May | 22.7°C | 10.3°C | 116 mm | 11 | 14 h 23 | 69 | Good coverage |
| June | 27.4°C | 15.6°C | 122 mm | 9.9 | 15 h 02 | 69 | Good coverage |
| July | 29.2°C | 17.1°C | 105 mm | 8.6 | 14 h 47 | 64 | Good coverage |
| August | 28.5°C | 15.7°C | 88 mm | 6.9 | 13 h 46 | 73 | Good coverage |
| September | 25.2°C | 11.2°C | 89 mm | 7.1 | 12 h 25 | 78 | Good coverage |
| October | 18.3°C | 5.2°C | 75 mm | 7.1 | 11 h 04 | 54 | Good coverage |
| November | 10.5°C | -0.1°C | 93 mm | 8 | 9 h 53 | 16 | Good coverage |
| December | 3.4°C | -5.4°C | 77 mm | 8.6 | 9 h 18 | 5 | Good coverage |
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 20.6°C26 Jan 1950 | -31.1°C19 Jan 1994 | 153 mm10 Jan 1987 | 262 mm2005 · driest 13 mm in 1981 | 62 |
| February | 23.3°C25 Feb 2000 | -30.6°C10 Feb 1982 | 63 mm27 Feb 1997 | 144 mm1997 · driest 11 mm in 1978 | 62 |
| March | 28.9°C21 Mar 2012 | -23.3°C6 Mar 1960 | 59 mm4 Mar 1953 | 153 mm1982 · driest 6 mm in 1981 | 63 |
| April | 31.1°C19 Apr 1977 | -11.1°C6 Apr 1982 | 103 mm19 Apr 2013 | 274 mm2013 · driest 24 mm in 1962 | 63 |
| May | 34.4°C28 May 2012 | -3.3°C1 May 1963 | 71 mm25 May 1989 | 201 mm2003 · driest 22 mm in 1988 | 63 |
| June | 37.2°C22 Jun 1988 | 2.2°C2 Jun 1956 | 130 mm28 Jun 1957 | 306 mm2010 · driest 16 mm in 1988 | 66 |
| July | 39.4°C15 Jul 1954 | 6.1°C25 Jul 1992 | 108 mm5 Jul 2003 | 299 mm1992 · driest 19 mm in 1968 | 66 |
| August | 37.2°C21 Aug 1983 | 2.8°C17 Aug 1992 | 101 mm7 Aug 1980 | 193 mm1977 · driest 9 mm in 1996 | 65 |
| September | 38.3°C6 Sep 1954 | -2.2°C29 Sep 1951 | 127 mm1 Sep 1989 | 281 mm1989 · driest 3 mm in 1954 | 66 |
| October | 33.3°C8 Oct 2007 | -8.3°C30 Oct 1965 | 71 mm1 Oct 1977 | 175 mm2001 · driest 0 mm in 2008 | 65 |
| November | 28.3°C1 Nov 1950 | -20.6°C30 Nov 1958 | 89 mm11 Nov 1983 | 248 mm1985 · driest 3 mm in 1976 | 62 |
| December | 22.2°C6 Dec 1998 | -28.9°C22 Dec 1989 | 89 mm3 Dec 1967 | 219 mm1967 · driest 6 mm in 1958 | 62 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 26 | 2 | 4 |
| February | 0 | 0 | 23 | 2 | 3 |
| March | <1 | 0 | 20 | 2 | <1 |
| April | 3 | <1 | 7 | 4 | 0 |
| May | 12 | 3 | <1 | 4 | 0 |
| June | 22 | 9 | 0 | 4 | 0 |
| July | 27 | 13 | 0 | 3 | 0 |
| August | 26 | 11 | 0 | 3 | 0 |
| September | 16 | 5 | <1 | 2 | 0 |
| October | 5 | <1 | 6 | 3 | 0 |
| November | <1 | 0 | 16 | 3 | <1 |
| December | 0 | 0 | 25 | 3 | 2 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 0% | 26% | 7% | 27% | -2.8–4.2°C |
| February | <1% | 23% | 7% | 24% | -0.1–6.6°C |
| March | 6% | 29% | 8% | 36% | 5.8–12.0°C |
| April | 20% | 34% | 11% | 45% | 13.6–18.8°C |
| May | 49% | 32% | 12% | 40% | 19.6–26.0°C |
| June | 68% | 30% | 13% | 35% | 25.4–29.3°C |
| July | 73% | 27% | 11% | 28% | 27.8–31.8°C |
| August | 76% | 23% | 9% | 20% | 26.9–30.2°C |
| September | 67% | 23% | 9% | 22% | 22.9–27.3°C |
| October | 33% | 23% | 8% | 25% | 15.9–20.7°C |
| November | 6% | 29% | 9% | 30% | 7.1–13.2°C |
| December | <1% | 29% | 8% | 34% | -0.7–6.6°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