September
September · June · August
United States · 1991–2020
September leads for comfortable weather in Lees Corner: typically 25.6°C by day, 10.1°C at night, with 46 mm of rain. Based on measured 1991–2020 NOAA station history.
September · June · August
August · July · June
September · May · October
The weakest month is January, scoring 5 against September’s 83 — days reach only -1.4°C, 25° below the 24°C the score treats as ideal, and nights drop to -14.2°C.
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 | -1.4°C | -14.2°C | 9 mm | 2.1 | 9 h 13 | 5 | Strong coverage |
| February | 1.3°C | -12.4°C | 12 mm | 2.8 | 10 h 23 | 5 | Strong coverage |
| March | 7.9°C | -6.4°C | 18 mm | 2.8 | 11 h 47 | 8 | Strong coverage |
| April | 15°C | 0.1°C | 46 mm | 4.9 | 13 h 23 | 40 | Strong coverage |
| May | 21.5°C | 7.3°C | 81 mm | 7.9 | 14 h 44 | 67 | Strong coverage |
| June | 26.7°C | 13.4°C | 95 mm | 8.2 | 15 h 28 | 75 | Strong coverage |
| July | 30.7°C | 16.7°C | 71 mm | 7.3 | 15 h 11 | 66 | Strong coverage |
| August | 30°C | 15.6°C | 67 mm | 6.2 | 14 h 00 | 72 | Strong coverage |
| September | 25.6°C | 10.1°C | 46 mm | 4.8 | 12 h 27 | 83 | Strong coverage |
| October | 17.3°C | 2.3°C | 41 mm | 4.1 | 10 h 55 | 53 | Strong coverage |
| November | 8.2°C | -4.8°C | 9 mm | 2 | 9 h 34 | 12 | Good coverage |
| December | 0.7°C | -11.1°C | 9 mm | 1.8 | 8 h 54 | 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 | 18.3°C25 Jan 1981 | -35.0°C6 Jan 1988 | 25 mm8 Jan 1975 | 34 mm2011 · driest 0 mm in 1995 | 51 |
| February | 22.2°C22 Feb 2000 | -38.3°C9 Feb 1994 | 29 mm22 Feb 2011 | 36 mm2011 · driest 0 mm in 2002 | 52 |
| March | 30.6°C26 Mar 2026 | -29.4°C7 Mar 1996 | 47 mm4 Mar 1985 | 73 mm1977 · driest 0 mm in 1994 | 53 |
| April | 35.6°C22 Apr 1980 | -15.6°C3 Apr 1975 | 59 mm28 Apr 2025 | 127 mm2001 · driest 0 mm in 2011 | 53 |
| May | 36.1°C21 May 2009 | -6.1°C2 May 2005 | 69 mm5 May 1999 | 179 mm1982 · driest 11 mm in 1989 | 55 |
| June | 43.3°C25 Jun 1988 | 1.1°C5 Jun 1998 | 70 mm21 Jun 2024 | 185 mm1998 · driest 3 mm in 2012 | 55 |
| July | 44.4°C16 Jul 2006 | 7.2°C3 Jul 2024 | 62 mm7 Jul 2020 | 166 mm2019 · driest 7 mm in 2007 | 54 |
| August | 43.3°C17 Aug 1988 | 5.0°C31 Aug 1974 | 181 mm30 Aug 1999 | 193 mm1999 · driest 0 mm in 2016 | 51 |
| September | 40.0°C6 Sep 2002 | -4.4°C30 Sep 1974 | 51 mm19 Sep 1996 | 150 mm1986 · driest 1 mm in 1979 | 50 |
| October | 35.6°C12 Oct 2015 | -14.4°C27 Oct 2020 | 83 mm13 Oct 2023 | 193 mm1998 · driest 0 mm in 2010 | 50 |
| November | 29.4°C9 Nov 1999 | -22.2°C27 Nov 1985 | 30 mm2 Nov 1972 | 34 mm2025 · driest 0 mm in 1990 | 48 |
| December | 20.6°C8 Dec 2023 | -33.9°C31 Dec 1990 | 15 mm4 Dec 2013 | 32 mm2023 · driest 0 mm in 1991 | 47 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 25 | <1 | 2 |
| February | 0 | 0 | 23 | <1 | 2 |
| March | <1 | 0 | 23 | <1 | 1 |
| April | 2 | <1 | 12 | 1 | <1 |
| May | 9 | 2 | 2 | 2 | 0 |
| June | 20 | 8 | 0 | 3 | 0 |
| July | 28 | 18 | 0 | 2 | 0 |
| August | 26 | 16 | 0 | 2 | 0 |
| September | 16 | 7 | <1 | 2 | 0 |
| October | 4 | 1 | 8 | 1 | <1 |
| November | <1 | 0 | 21 | <1 | <1 |
| December | 0 | 0 | 24 | <1 | 1 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 0% | 6% | <1% | 1% | -6.1–2.4°C |
| February | <1% | 7% | <1% | 2% | -4.4–7.8°C |
| March | 8% | 10% | 2% | 6% | 2.7–12.7°C |
| April | 24% | 18% | 5% | 15% | 12.1–18.2°C |
| May | 51% | 25% | 8% | 28% | 19.1–24.7°C |
| June | 70% | 26% | 9% | 28% | 24.4–29.6°C |
| July | 76% | 23% | 7% | 22% | 28.9–34.0°C |
| August | 78% | 21% | 6% | 16% | 27.9–32.4°C |
| September | 73% | 15% | 5% | 10% | 23.3–28.4°C |
| October | 35% | 13% | 3% | 7% | 14.1–20.0°C |
| November | 7% | 6% | <1% | <1% | 4.0–12.3°C |
| December | <1% | 6% | <1% | 2% | -4.1–5.1°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