September
September · May · October
United States · 1991–2020
September leads for comfortable weather in Bethel: typically 28.4°C by day, 16°C at night, with 98 mm of rain. Based on measured 1991–2020 NOAA station history.
September · May · October
July · June · August
October · April · November
The weakest month is January, scoring 5 against September’s 73 — days reach only 7.9°C, 16° 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 | 7.9°C | -1.9°C | 102 mm | 7.6 | 9 h 59 | 5 | Good coverage |
| February | 9.6°C | -0.2°C | 119 mm | 7.3 | 10 h 50 | 9 | Good coverage |
| March | 15.6°C | 4.5°C | 135 mm | 9.4 | 11 h 51 | 34 | Good coverage |
| April | 21.4°C | 9.7°C | 128 mm | 8.8 | 13 h 03 | 64 | Good coverage |
| May | 25.8°C | 14.9°C | 151 mm | 9.6 | 14 h 02 | 72 | Good coverage |
| June | 30.2°C | 19.6°C | 103 mm | 6.6 | 14 h 34 | 58 | Good coverage |
| July | 31.2°C | 21.1°C | 93 mm | 6.5 | 14 h 21 | 54 | Good coverage |
| August | 31.2°C | 19.9°C | 99 mm | 6.3 | 13 h 30 | 56 | Good coverage |
| September | 28.4°C | 16°C | 98 mm | 5.3 | 12 h 22 | 73 | Good coverage |
| October | 22.3°C | 9.7°C | 105 mm | 7 | 11 h 13 | 71 | Good coverage |
| November | 15.6°C | 4°C | 123 mm | 7.5 | 10 h 14 | 36 | Good coverage |
| December | 10°C | 0.4°C | 142 mm | 8.5 | 9 h 45 | 8 | Good coverage |
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 23.3°C4 Jan 2004 | -17.8°C17 Jan 2018 | 83 mm3 Jan 2023 | 200 mm2013 · driest 29 mm in 2026 | 23 |
| February | 25.0°C24 Feb 2012 | -14.4°C10 Feb 2011 | 80 mm15 Feb 2023 | 371 mm2018 · driest 36 mm in 2002 | 22 |
| March | 30.6°C23 Mar 2026 | -16.7°C6 Mar 2015 | 86 mm10 Mar 2016 | 328 mm2016 · driest 43 mm in 2025 | 21 |
| April | 32.8°C19 Apr 2006 | -5.0°C1 Apr 2019 | 102 mm6 Apr 2025 | 314 mm2025 · driest 19 mm in 2012 | 22 |
| May | 33.3°C16 May 2018 | 2.2°C24 May 2017 | 290 mm1 May 2010 | 431 mm2010 · driest 15 mm in 2005 | 22 |
| June | 38.9°C30 Jun 2012 | 10.0°C8 Jun 2016 | 75 mm18 Jun 2011 | 268 mm2014 · driest 18 mm in 2002 | 22 |
| July | 38.9°C7 Jul 2012 | 11.7°C26 Jul 2019 | 115 mm31 Jul 2009 | 234 mm2009 · driest 40 mm in 2011 | 22 |
| August | 40.0°C17 Aug 2007 | 8.9°C14 Aug 2004 | 102 mm29 Aug 2017 | 220 mm2023 · driest 3 mm in 2007 | 21 |
| September | 36.7°C2 Sep 2011 | 4.4°C29 Sep 2003 | 119 mm19 Sep 2011 | 251 mm2018 · driest 4 mm in 2010 | 21 |
| October | 34.4°C3 Oct 2019 | -2.8°C29 Oct 2017 | 110 mm12 Oct 2004 | 245 mm2019 · driest 6 mm in 2005 | 22 |
| November | 29.4°C1 Nov 2016 | -10.0°C13 Nov 2019 | 130 mm29 Nov 2001 | 328 mm2001 · driest 31 mm in 2009 | 23 |
| December | 24.4°C25 Dec 2025 | -19.4°C23 Dec 2022 | 118 mm5 Dec 2011 | 231 mm2008 · driest 38 mm in 2025 | 23 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 21 | 4 | 1 |
| February | <1 | 0 | 16 | 3 | <1 |
| March | 2 | 0 | 8 | 4 | <1 |
| April | 10 | <1 | <1 | 4 | 0 |
| May | 20 | 6 | 0 | 5 | 0 |
| June | 29 | 18 | 0 | 4 | 0 |
| July | 30 | 23 | 0 | 3 | 0 |
| August | 31 | 21 | 0 | 3 | 0 |
| September | 25 | 12 | 0 | 3 | 0 |
| October | 12 | 2 | <1 | 3 | 0 |
| November | 2 | 0 | 8 | 4 | <1 |
| December | 0 | 0 | 16 | 5 | <1 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 3% | 25% | 14% | 28% | 5.1–11.5°C |
| February | 6% | 26% | 13% | 29% | 6.7–14.8°C |
| March | 24% | 29% | 14% | 31% | 13.4–21.0°C |
| April | 47% | 30% | 14% | 36% | 19.7–23.7°C |
| May | 61% | 32% | 15% | 38% | 24.0–28.4°C |
| June | 77% | 23% | 11% | 20% | 28.9–31.4°C |
| July | 79% | 22% | 10% | 20% | 29.6–32.6°C |
| August | 80% | 21% | 10% | 20% | 29.3–32.7°C |
| September | 82% | 18% | 9% | 16% | 27.0–30.4°C |
| October | 56% | 22% | 10% | 23% | 20.5–24.9°C |
| November | 19% | 25% | 11% | 24% | 12.1–17.9°C |
| December | 4% | 27% | 14% | 28% | 7.8–12.5°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