September
September · August · June
United States · 1991–2020
September leads for comfortable weather in Colburn: typically 23.6°C by day, 10.9°C at night, with 89 mm of rain. Based on measured 1991–2020 NOAA station history.
September · August · June
July · August · June
September · May · October
The weakest month is January, scoring 5 against September’s 80 — days reach only -0.4°C, 24° 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 | -0.4°C | -9.4°C | 66 mm | 8.8 | 9 h 28 | 5 | Strong coverage |
| February | 1.8°C | -8°C | 63 mm | 7.9 | 10 h 32 | 5 | Strong coverage |
| March | 7.9°C | -3.1°C | 65 mm | 8.4 | 11 h 48 | 5 | Strong coverage |
| April | 15°C | 2.6°C | 97 mm | 9.8 | 13 h 16 | 33 | Strong coverage |
| May | 21.3°C | 8.8°C | 114 mm | 10.6 | 14 h 30 | 62 | Strong coverage |
| June | 26.1°C | 14.4°C | 114 mm | 9.8 | 15 h 10 | 75 | Strong coverage |
| July | 27.9°C | 16.2°C | 118 mm | 8.1 | 14 h 54 | 69 | Strong coverage |
| August | 26.8°C | 15°C | 105 mm | 8.3 | 13 h 50 | 76 | Strong coverage |
| September | 23.6°C | 10.9°C | 89 mm | 7.4 | 12 h 25 | 80 | Strong coverage |
| October | 16.9°C | 4.9°C | 89 mm | 8.3 | 11 h 01 | 46 | Strong coverage |
| November | 8.8°C | -0.9°C | 74 mm | 9 | 9 h 47 | 10 | Strong coverage |
| December | 2.6°C | -5.6°C | 67 mm | 8.7 | 9 h 11 | 5 | Strong coverage |
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 17.8°C5 Jan 1997 | -30.0°C19 Jan 1994 | 78 mm7 Jan 2008 | 159 mm2005 · driest 15 mm in 1994 | 36 |
| February | 22.2°C26 Feb 2000 | -28.9°C1 Feb 2019 | 79 mm20 Feb 2018 | 199 mm2018 · driest 6 mm in 1994 | 37 |
| March | 28.9°C22 Mar 2012 | -21.1°C6 Mar 2015 | 51 mm12 Mar 2006 | 146 mm2009 · driest 14 mm in 2015 | 37 |
| April | 30.0°C26 Apr 1990 | -9.4°C8 Apr 1996 | 45 mm22 Apr 1996 | 214 mm2011 · driest 13 mm in 2004 | 37 |
| May | 33.9°C28 May 2012 | -3.9°C10 May 2020 | 67 mm10 May 1996 | 201 mm1996 · driest 17 mm in 2007 | 37 |
| June | 36.1°C29 Jun 2012 | 1.7°C5 Jun 1990 | 79 mm8 Jun 1993 | 224 mm1994 · driest 22 mm in 1991 | 37 |
| July | 37.8°C15 Jul 2012 | 5.0°C6 Jul 2001 | 160 mm18 Jul 1996 | 269 mm2006 · driest 41 mm in 2013 | 36 |
| August | 35.6°C16 Aug 2009 | 4.4°C30 Aug 2009 | 173 mm16 Aug 2016 | 256 mm2016 · driest 25 mm in 2010 | 35 |
| September | 34.4°C11 Sep 2013 | -1.1°C28 Sep 1991 | 97 mm28 Sep 2019 | 261 mm2008 · driest 25 mm in 1995 | 35 |
| October | 30.6°C9 Oct 2007 | -5.0°C31 Oct 2020 | 88 mm25 Oct 2021 | 244 mm2021 · driest 18 mm in 2010 | 36 |
| November | 25.6°C2 Nov 2016 | -15.6°C27 Nov 1991 | 59 mm2 Nov 1992 | 148 mm2003 · driest 16 mm in 2012 | 35 |
| December | 20.6°C6 Dec 2001 | -28.3°C20 Dec 2016 | 50 mm29 Dec 1990 | 142 mm1990 · driest 10 mm in 1994 | 37 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 28 | 2 | 8 |
| February | 0 | 0 | 25 | 2 | 6 |
| March | <1 | 0 | 22 | 2 | 3 |
| April | 2 | 0 | 10 | 4 | <1 |
| May | 9 | 2 | <1 | 4 | 0 |
| June | 19 | 7 | 0 | 4 | 0 |
| July | 25 | 9 | 0 | 3 | 0 |
| August | 24 | 5 | 0 | 3 | 0 |
| September | 13 | 3 | <1 | 3 | 0 |
| October | 3 | <1 | 5 | 3 | <1 |
| November | 0 | 0 | 18 | 2 | 2 |
| December | 0 | 0 | 25 | 2 | 5 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 0% | 29% | 7% | 33% | -3.0–2.9°C |
| February | <1% | 27% | 6% | 32% | -1.7–5.4°C |
| March | 5% | 29% | 8% | 37% | 5.3–11.8°C |
| April | 17% | 34% | 12% | 45% | 12.6–17.4°C |
| May | 42% | 33% | 13% | 42% | 19.2–24.5°C |
| June | 64% | 32% | 13% | 38% | 24.4–27.6°C |
| July | 73% | 27% | 11% | 31% | 26.2–29.6°C |
| August | 73% | 26% | 10% | 26% | 25.2–28.1°C |
| September | 63% | 24% | 9% | 27% | 21.8–25.7°C |
| October | 26% | 27% | 10% | 32% | 15.3–19.2°C |
| November | 4% | 29% | 8% | 36% | 5.4–12.2°C |
| December | 0% | 29% | 7% | 34% | -0.4–6.1°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