September
September · June · August
United States · 1991–2020
September leads for comfortable weather in Danforth: typically 25.5°C by day, 10.9°C at night, with 72 mm of rain. Based on measured 1991–2020 NOAA station history.
September · June · August
August · July · June
October · September · May
The weakest month is January, scoring 5 against September’s 79 — days reach only 0.6°C, 23° 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 | 0.6°C | -9.1°C | 78 mm | 7.1 | 9 h 33 | 5 | Good coverage |
| February | 3.7°C | -7°C | 62 mm | 6 | 10 h 34 | 5 | Good coverage |
| March | 10.3°C | -2.1°C | 81 mm | 7.9 | 11 h 49 | 13 | Good coverage |
| April | 17.6°C | 3.5°C | 108 mm | 10.2 | 13 h 14 | 42 | Good coverage |
| May | 23.4°C | 9.5°C | 126 mm | 11.2 | 14 h 26 | 68 | Good coverage |
| June | 28.2°C | 15.4°C | 104 mm | 9 | 15 h 05 | 70 | Good coverage |
| July | 30°C | 17.3°C | 128 mm | 8.1 | 14 h 50 | 58 | Good coverage |
| August | 28.9°C | 15.7°C | 104 mm | 7.8 | 13 h 48 | 69 | Good coverage |
| September | 25.5°C | 10.9°C | 72 mm | 6.3 | 12 h 25 | 79 | Good coverage |
| October | 18.8°C | 5.2°C | 92 mm | 7.9 | 11 h 02 | 53 | Good coverage |
| November | 10.5°C | -0.5°C | 87 mm | 7.9 | 9 h 51 | 16 | Good coverage |
| December | 3.1°C | -6.3°C | 83 mm | 8 | 9 h 15 | 5 | Good coverage |
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 19.4°C8 Jan 2008 | -31.7°C20 Jan 1985 | 105 mm8 Jan 2008 | 216 mm2005 · driest 1 mm in 1986 | 44 |
| February | 23.3°C26 Feb 2000 | -28.9°C3 Feb 1996 | 65 mm14 Feb 1990 | 162 mm1990 · driest 1 mm in 1994 | 44 |
| March | 31.7°C22 Mar 2012 | -20.0°C5 Mar 1978 | 76 mm23 Mar 2007 | 187 mm2007 · driest 4 mm in 1986 | 44 |
| April | 33.9°C26 Apr 1986 | -13.9°C7 Apr 1982 | 72 mm17 Apr 2006 | 188 mm1970 · driest 15 mm in 1971 | 44 |
| May | 37.2°C28 May 2012 | -3.9°C3 May 1971 | 113 mm13 May 1970 | 250 mm1996 · driest 29 mm in 2005 | 44 |
| June | 41.1°C25 Jun 1988 | 2.8°C11 Jun 1972 | 80 mm3 Jun 1980 | 235 mm1993 · driest 2 mm in 1988 | 44 |
| July | 41.7°C8 Jul 2012 | 5.6°C5 Jul 1972 | 97 mm10 Jul 1986 | 245 mm2006 · driest 19 mm in 2012 | 44 |
| August | 42.2°C16 Aug 1988 | 2.8°C27 Aug 1986 | 114 mm31 Aug 1989 | 230 mm1977 · driest 1 mm in 1986 | 44 |
| September | 38.3°C2 Sep 2011 | -3.3°C23 Sep 1995 | 77 mm14 Sep 1972 | 222 mm2008 · driest 1 mm in 1979 | 44 |
| October | 33.9°C10 Oct 2010 | -8.3°C24 Oct 1981 | 62 mm16 Oct 1993 | 206 mm2001 · driest 13 mm in 1971 | 44 |
| November | 26.7°C2 Nov 2000 | -17.8°C26 Nov 1977 | 52 mm18 Nov 2003 | 217 mm1985 · driest 11 mm in 1999 | 43 |
| December | 23.3°C4 Dec 2012 | -30.6°C24 Dec 1983 | 68 mm3 Dec 1982 | 166 mm2006 · driest 3 mm in 1976 | 44 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 28 | 2 | 5 |
| February | 0 | 0 | 26 | 2 | 3 |
| March | 1 | <1 | 21 | 3 | 2 |
| April | 4 | <1 | 8 | 4 | <1 |
| May | 13 | 5 | <1 | 4 | 0 |
| June | 24 | 12 | 0 | 3 | 0 |
| July | 29 | 16 | 0 | 4 | 0 |
| August | 27 | 13 | 0 | 3 | 0 |
| September | 17 | 6 | <1 | 2 | 0 |
| October | 6 | 1 | 4 | 3 | 0 |
| November | <1 | 0 | 17 | 4 | 1 |
| December | 0 | 0 | 27 | 3 | 4 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 0% | 22% | 5% | 24% | -4.4–4.5°C |
| February | <1% | 21% | 6% | 18% | -1.6–6.4°C |
| March | 7% | 26% | 9% | 31% | 6.5–13.1°C |
| April | 26% | 32% | 11% | 40% | 14.5–20.5°C |
| May | 53% | 34% | 12% | 42% | 20.8–27.0°C |
| June | 67% | 31% | 11% | 34% | 26.5–30.5°C |
| July | 75% | 25% | 11% | 24% | 28.2–33.0°C |
| August | 76% | 23% | 9% | 23% | 26.9–31.2°C |
| September | 69% | 23% | 8% | 23% | 23.5–28.1°C |
| October | 33% | 25% | 9% | 25% | 16.2–20.9°C |
| November | 6% | 26% | 9% | 25% | 6.7–12.8°C |
| December | <1% | 24% | 8% | 26% | -0.8–6.1°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