September
September · May · October
United States · 1991–2020
September leads for comfortable weather in Betsy Layne: typically 26.6°C by day, 13.6°C at night, with 84 mm of rain. Based on measured 1991–2020 NOAA station history.
September · May · October
August · July · June
October · April · May
The weakest month is January, scoring 5 against September’s 78 — days reach only 6.8°C, 17° below the 24°C the score treats as ideal, and nights drop to -4.6°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 | 6.8°C | -4.6°C | 91 mm | 8.4 | 9 h 50 | 5 | Strong coverage |
| February | 9.3°C | -3.2°C | 86 mm | 8.6 | 10 h 45 | 7 | Strong coverage |
| March | 14.6°C | 0.1°C | 114 mm | 10.5 | 11 h 50 | 24 | Strong coverage |
| April | 20.9°C | 5.3°C | 97 mm | 9.3 | 13 h 07 | 58 | Strong coverage |
| May | 24.6°C | 11.3°C | 113 mm | 10.5 | 14 h 10 | 74 | Strong coverage |
| June | 28.5°C | 16.4°C | 128 mm | 10.3 | 14 h 44 | 63 | Strong coverage |
| July | 30.2°C | 18.6°C | 127 mm | 9.4 | 14 h 31 | 55 | Strong coverage |
| August | 29.9°C | 17.8°C | 93 mm | 7.5 | 13 h 36 | 63 | Strong coverage |
| September | 26.6°C | 13.6°C | 84 mm | 7 | 12 h 23 | 78 | Strong coverage |
| October | 20.9°C | 6.7°C | 81 mm | 7.3 | 11 h 09 | 64 | Strong coverage |
| November | 14.7°C | 0.5°C | 75 mm | 7.4 | 10 h 06 | 34 | Strong coverage |
| December | 8.9°C | -2.6°C | 97 mm | 9.5 | 9 h 35 | 5 | Strong coverage |
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 26.7°C22 Jan 1999 | -32.2°C18 Jan 1994 | 76 mm14 Jan 2003 | 173 mm1999 · driest 16 mm in 1981 | 50 |
| February | 28.3°C23 Feb 1996 | -27.2°C21 Feb 2015 | 86 mm17 Feb 2023 | 235 mm2003 · driest 11 mm in 2002 | 51 |
| March | 32.2°C23 Mar 2026 | -20.0°C3 Mar 1980 | 98 mm1 Mar 2021 | 273 mm1994 · driest 32 mm in 1990 | 48 |
| April | 33.9°C27 Apr 1986 | -6.7°C5 Apr 2004 | 72 mm4 Apr 2025 | 198 mm2011 · driest 14 mm in 1985 | 48 |
| May | 34.4°C19 May 1996 | -1.1°C5 May 1973 | 62 mm15 May 1972 | 206 mm1996 · driest 22 mm in 1977 | 51 |
| June | 38.9°C30 Jun 2012 | 2.2°C11 Jun 1972 | 75 mm4 Jun 1993 | 202 mm1998 · driest 0 mm in 1980 | 50 |
| July | 40.6°C8 Jul 1988 | 7.8°C6 Jul 1972 | 70 mm5 Jul 2000 | 385 mm2022 · driest 29 mm in 1995 | 53 |
| August | 40.6°C17 Aug 1988 | 6.1°C28 Aug 1986 | 94 mm24 Aug 1999 | 220 mm1978 · driest 24 mm in 2007 | 49 |
| September | 37.2°C8 Sep 2007 | 1.7°C30 Sep 1993 | 79 mm12 Sep 1975 | 233 mm2018 · driest 1 mm in 2019 | 50 |
| October | 35.0°C4 Oct 2019 | -6.1°C27 Oct 1997 | 61 mm16 Oct 1989 | 182 mm2002 · driest 5 mm in 2024 | 49 |
| November | 30.6°C3 Nov 1987 | -11.1°C20 Nov 2014 | 130 mm28 Nov 1973 | 217 mm1973 · driest 19 mm in 2012 | 50 |
| December | 27.8°C3 Dec 1982 | -23.3°C22 Dec 1989 | 56 mm2 Dec 1991 | 248 mm1990 · driest 24 mm in 1981 | 49 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | <1 | 0 | 20 | 3 | 2 |
| February | <1 | 0 | 18 | 3 | 2 |
| March | 3 | <1 | 14 | 4 | 1 |
| April | 10 | 2 | 5 | 4 | 0 |
| May | 17 | 5 | <1 | 4 | 0 |
| June | 26 | 12 | 0 | 4 | 0 |
| July | 30 | 19 | 0 | 4 | 0 |
| August | 29 | 17 | 0 | 3 | 0 |
| September | 20 | 8 | 0 | 3 | 0 |
| October | 9 | 1 | 3 | 3 | 0 |
| November | 2 | 0 | 13 | 3 | <1 |
| December | <1 | 0 | 19 | 3 | 1 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 2% | 29% | 10% | 35% | 3.2–10.0°C |
| February | 6% | 31% | 11% | 37% | 4.7–12.8°C |
| March | 19% | 33% | 13% | 43% | 12.0–18.1°C |
| April | 43% | 30% | 12% | 38% | 18.8–23.7°C |
| May | 56% | 33% | 13% | 42% | 22.4–27.5°C |
| June | 67% | 31% | 13% | 37% | 26.6–30.8°C |
| July | 69% | 31% | 15% | 36% | 28.6–32.7°C |
| August | 75% | 25% | 10% | 24% | 27.9–32.6°C |
| September | 72% | 23% | 10% | 23% | 24.8–28.7°C |
| October | 50% | 21% | 8% | 21% | 18.6–22.8°C |
| November | 19% | 26% | 9% | 28% | 11.5–17.7°C |
| December | 4% | 29% | 10% | 36% | 5.7–12.5°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