September
September · May · October
United States · 1991–2020
September leads for comfortable weather in Bert (historical): typically 27.3°C by day, 14.6°C at night, with 118 mm of rain. Based on measured 1991–2020 NOAA station history.
September · May · October
July · June · August
October · April · May
The weakest month is January, scoring 5 against September’s 73 — days reach only 10.6°C, 13° below the 24°C the score treats as ideal, and nights drop to -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 | 10.6°C | -2°C | 145 mm | 9.5 | 10 h 04 | 5 | Strong coverage |
| February | 12.8°C | -1°C | 131 mm | 8.5 | 10 h 53 | 16 | Strong coverage |
| March | 16.9°C | 2.7°C | 139 mm | 9.7 | 11 h 52 | 34 | Strong coverage |
| April | 21.9°C | 6.4°C | 121 mm | 8.6 | 13 h 00 | 61 | Strong coverage |
| May | 25.7°C | 11.5°C | 110 mm | 8.8 | 13 h 57 | 72 | Strong coverage |
| June | 29.3°C | 16.5°C | 131 mm | 10.3 | 14 h 27 | 60 | Strong coverage |
| July | 31.1°C | 18.6°C | 125 mm | 9.5 | 14 h 16 | 52 | Strong coverage |
| August | 30.3°C | 18.2°C | 149 mm | 10.2 | 13 h 27 | 51 | Strong coverage |
| September | 27.3°C | 14.6°C | 118 mm | 7.5 | 12 h 21 | 73 | Strong coverage |
| October | 22.1°C | 7.6°C | 110 mm | 6.4 | 11 h 15 | 67 | Strong coverage |
| November | 16.5°C | 1.5°C | 124 mm | 7.8 | 10 h 18 | 34 | Strong coverage |
| December | 11.9°C | -0.9°C | 144 mm | 9.7 | 9 h 51 | 10 | Strong coverage |
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 24.4°C29 Jan 2002 | -16.7°C19 Jan 1994 | 118 mm27 Jan 1996 | 283 mm1998 · driest 55 mm in 2005 | 35 |
| February | 26.1°C5 Feb 2025 | -17.2°C5 Feb 1996 | 97 mm4 Feb 1998 | 343 mm2020 · driest 26 mm in 2017 | 35 |
| March | 30.0°C28 Mar 2026 | -13.3°C15 Mar 1993 | 82 mm2 Mar 2007 | 320 mm2011 · driest 41 mm in 2016 | 35 |
| April | 31.7°C6 Apr 2010 | -6.1°C3 Apr 1992 | 83 mm25 Apr 2010 | 270 mm1998 · driest 32 mm in 1992 | 34 |
| May | 33.9°C19 May 1996 | -2.8°C2 May 1999 | 72 mm15 May 2014 | 299 mm2018 · driest 26 mm in 2000 | 34 |
| June | 39.4°C30 Jun 2012 | 6.1°C14 Jun 1995 | 151 mm26 Jun 2004 | 327 mm2004 · driest 21 mm in 2007 | 35 |
| July | 38.9°C2 Jul 2012 | 10.6°C3 Jul 2008 | 119 mm2 Jul 2003 | 321 mm2005 · driest 45 mm in 1998 | 35 |
| August | 36.7°C18 Aug 1999 | 9.4°C29 Aug 1992 | 107 mm18 Aug 2021 | 301 mm2005 · driest 27 mm in 1997 | 33 |
| September | 35.6°C10 Sep 2019 | 2.8°C29 Sep 2003 | 159 mm21 Sep 2009 | 435 mm2004 · driest 5 mm in 2019 | 33 |
| October | 35.0°C1 Oct 2019 | -5.0°C29 Oct 2001 | 172 mm11 Oct 2020 | 301 mm2020 · driest 1 mm in 2000 | 34 |
| November | 28.9°C2 Nov 2003 | -10.6°C23 Nov 2008 | 94 mm19 Nov 2003 | 280 mm2015 · driest 18 mm in 2012 | 35 |
| December | 25.0°C6 Dec 1998 | -16.1°C24 Dec 2022 | 99 mm17 Dec 1992 | 314 mm2018 · driest 48 mm in 2025 | 35 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) |
|---|---|---|---|---|
| January | 0 | 0 | 17 | 5 |
| February | <1 | 0 | 15 | 4 |
| March | 2 | 0 | 9 | 4 |
| April | 10 | <1 | 3 | 4 |
| May | 20 | 4 | <1 | 4 |
| June | 27 | 15 | 0 | 4 |
| July | 30 | 23 | 0 | 4 |
| August | 29 | 19 | 0 | 4 |
| September | 23 | 9 | 0 | 3 |
| October | 10 | <1 | 2 | 3 |
| November | 1 | 0 | 12 | 4 |
| December | 0 | 0 | 16 | 5 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 4% | 30% | 15% | 37% | 8.1–12.9°C |
| February | 9% | 32% | 15% | 39% | 10.2–15.9°C |
| March | 28% | 31% | 14% | 36% | 14.7–20.4°C |
| April | 54% | 28% | 13% | 34% | 20.3–24.1°C |
| May | 66% | 29% | 12% | 36% | 23.9–27.5°C |
| June | 65% | 34% | 14% | 44% | 27.3–31.3°C |
| July | 67% | 33% | 13% | 41% | 29.5–32.5°C |
| August | 66% | 34% | 14% | 40% | 28.7–31.6°C |
| September | 74% | 25% | 11% | 27% | 25.8–29.7°C |
| October | 62% | 20% | 9% | 24% | 20.3–24.0°C |
| November | 23% | 25% | 12% | 25% | 13.7–19.3°C |
| December | 5% | 31% | 15% | 38% | 9.6–14.5°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