September
September · May · August
United States · 1991–2020
September leads for comfortable weather in Bethany: typically 26.2°C by day, 12°C at night, with 100 mm of rain. Based on measured 1991–2020 NOAA station history.
September · May · August
July · August · June
October · April · May
The weakest month is January, scoring 5 against September’s 75 — days reach only 1.6°C, 22° below the 24°C the score treats as ideal, and nights drop to -9.9°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 | 1.6°C | -9.9°C | 24 mm | 4.2 | 9 h 32 | 5 | Good coverage |
| February | 3.7°C | -8.6°C | 32 mm | 4.6 | 10 h 34 | 5 | Good coverage |
| March | 12°C | -1.9°C | 47 mm | 6.3 | 11 h 49 | 25 | Good coverage |
| April | 18.3°C | 3.7°C | 79 mm | 7.3 | 13 h 14 | 51 | Good coverage |
| May | 23.3°C | 10°C | 124 mm | 9.6 | 14 h 26 | 70 | Good coverage |
| June | 28.7°C | 16.2°C | 130 mm | 9.2 | 15 h 05 | 64 | Good coverage |
| July | 30.8°C | 18.3°C | 88 mm | 6.3 | 14 h 50 | 61 | Good coverage |
| August | 29.7°C | 16.7°C | 87 mm | 7.4 | 13 h 48 | 67 | Good coverage |
| September | 26.2°C | 12°C | 100 mm | 6.2 | 12 h 25 | 75 | Good coverage |
| October | 18.5°C | 4.3°C | 64 mm | 5.9 | 11 h 02 | 56 | Good coverage |
| November | 11.3°C | -2.5°C | 32 mm | 3.7 | 9 h 51 | 26 | Good coverage |
| December | 3.7°C | -8.1°C | 45 mm | 4.7 | 9 h 15 | 5 | Good coverage |
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 21.5°C8 Jan 2003 | -29.8°C14 Jan 2024 | 32 mm25 Jan 2021 | 51 mm2024 · driest 3 mm in 2025 | 24 |
| February | 27.5°C26 Feb 2024 | -32.8°C15 Feb 2021 | 47 mm24 Feb 2007 | 75 mm2012 · driest 1 mm in 2022 | 25 |
| March | 36.5°C21 Mar 2026 | -23.9°C4 Mar 2019 | 75 mm14 Mar 2021 | 127 mm2021 · driest 5 mm in 2014 | 25 |
| April | 34.7°C15 Apr 2002 | -13.8°C7 Apr 2018 | 70 mm14 Apr 2012 | 127 mm2014 · driest 17 mm in 2018 | 25 |
| May | 37.3°C26 May 2018 | -3.6°C3 May 2004 | 100 mm6 May 2015 | 250 mm2015 · driest 10 mm in 2023 | 25 |
| June | 38.6°C13 Jun 2022 | 4.6°C1 Jun 2012 | 77 mm18 Jun 2016 | 278 mm2010 · driest 0 mm in 2002 | 25 |
| July | 39.8°C19 Jul 2006 | 7.0°C15 Jul 2014 | 106 mm25 Jul 2005 | 193 mm2010 · driest 0 mm in 2002 | 25 |
| August | 39.8°C18 Aug 2003 | 4.7°C31 Aug 2009 | 85 mm26 Aug 2023 | 203 mm2011 · driest 10 mm in 2022 | 24 |
| September | 38.3°C4 Sep 2012 | -1.1°C29 Sep 2003 | 127 mm30 Sep 2014 | 230 mm2014 · driest 4 mm in 2024 | 24 |
| October | 36.5°C5 Oct 2024 | -9.8°C18 Oct 2022 | 70 mm24 Oct 2021 | 157 mm2017 · driest 4 mm in 2010 | 24 |
| November | 28.4°C8 Nov 2006 | -17.1°C18 Nov 2018 | 55 mm12 Nov 2010 | 96 mm2024 · driest 1 mm in 2006 | 24 |
| December | 23.5°C15 Dec 2021 | -26.9°C27 Dec 2017 | 58 mm28 Dec 2019 | 132 mm2015 · driest 1 mm in 2002 | 24 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) |
|---|---|---|---|---|
| January | 0 | 0 | 30 | <1 |
| February | 0 | 0 | 26 | 1 |
| March | 2 | <1 | 20 | 2 |
| April | 5 | 1 | 9 | 2 |
| May | 13 | 4 | <1 | 4 |
| June | 25 | 12 | 0 | 4 |
| July | 29 | 18 | 0 | 2 |
| August | 28 | 14 | 0 | 3 |
| September | 19 | 7 | <1 | 3 |
| October | 6 | 1 | 8 | 2 |
| November | <1 | 0 | 21 | <1 |
| December | 0 | 0 | 29 | 1 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | <1% | 14% | 2% | 6% | -1.6–4.3°C |
| February | 3% | 15% | 3% | 10% | -0.7–9.8°C |
| March | 20% | 20% | 6% | 21% | 8.8–16.3°C |
| April | 37% | 24% | 8% | 25% | 15.6–20.5°C |
| May | 55% | 31% | 12% | 39% | 21.3–25.9°C |
| June | 70% | 29% | 13% | 38% | 27.4–30.7°C |
| July | 77% | 23% | 9% | 20% | 29.4–32.6°C |
| August | 77% | 23% | 8% | 22% | 28.0–31.6°C |
| September | 77% | 19% | 9% | 16% | 24.4–28.8°C |
| October | 42% | 18% | 6% | 13% | 15.7–21.9°C |
| November | 12% | 12% | 4% | 9% | 8.9–14.3°C |
| December | <1% | 15% | 4% | 14% | 1.2–7.3°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