September
September · August · June
United States · 1991–2020
September leads for comfortable weather in Ayresville: typically 24°C by day, 10.1°C at night, with 76 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 82 — days reach only -2.6°C, 27° 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 | -2.6°C | -12.2°C | 33 mm | 5.3 | 9 h 28 | 5 | Good coverage |
| February | 0.3°C | -9.3°C | 33 mm | 5.1 | 10 h 32 | 5 | Good coverage |
| March | 7.6°C | -3.6°C | 55 mm | 5.9 | 11 h 48 | 7 | Good coverage |
| April | 15.7°C | 2.8°C | 86 mm | 8.4 | 13 h 16 | 39 | Good coverage |
| May | 21.6°C | 9.1°C | 116 mm | 9.9 | 14 h 30 | 64 | Good coverage |
| June | 26.4°C | 14.8°C | 112 mm | 9.7 | 15 h 11 | 75 | Good coverage |
| July | 27.7°C | 16.3°C | 113 mm | 8 | 14 h 55 | 70 | Good coverage |
| August | 27.1°C | 15.1°C | 101 mm | 7.8 | 13 h 51 | 76 | Good coverage |
| September | 24°C | 10.1°C | 76 mm | 6.8 | 12 h 25 | 82 | Good coverage |
| October | 17°C | 3.7°C | 75 mm | 7 | 11 h 01 | 48 | Good coverage |
| November | 8°C | -2.5°C | 53 mm | 5.7 | 9 h 46 | 11 | Good coverage |
| December | 0.3°C | -8.9°C | 38 mm | 5.7 | 9 h 10 | 5 | Good coverage |
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 18.9°C31 Jan 1989 | -34.4°C22 Jan 1930 | 51 mm1 Jan 2001 | 106 mm1974 · driest 0 mm in 1902 | 110 |
| February | 21.7°C15 Feb 1921 | -34.4°C4 Feb 1996 | 64 mm9 Feb 2001 | 120 mm1911 · driest 0 mm in 1995 | 110 |
| March | 30.6°C29 Mar 1986 | -28.3°C19 Mar 1923 | 71 mm8 Mar 2009 | 144 mm1990 · driest 2 mm in 1918 | 110 |
| April | 34.4°C10 Apr 1930 | -12.8°C7 Apr 1982 | 79 mm29 Apr 1974 | 204 mm1973 · driest 12 mm in 1942 | 110 |
| May | 41.1°C31 May 1934 | -5.6°C3 May 2005 | 114 mm23 May 1907 | 287 mm1996 · driest 16 mm in 1992 | 110 |
| June | 40.6°C1 Jun 1934 | 2.8°C11 Jun 1972 | 167 mm26 Jun 1944 | 313 mm1924 · driest 12 mm in 1910 | 108 |
| July | 42.2°C13 Jul 1936 | 6.1°C14 Jul 1950 | 114 mm29 Jul 1970 | 325 mm1992 · driest 0 mm in 1947 | 110 |
| August | 40.6°C18 Aug 1936 | 2.2°C29 Aug 1927 | 126 mm11 Aug 1949 | 295 mm1977 · driest 0 mm in 1947 | 108 |
| September | 38.3°C9 Sep 1955 | -3.9°C28 Sep 1942 | 109 mm17 Sep 1970 | 258 mm1970 · driest 1 mm in 1947 | 110 |
| October | 33.9°C2 Oct 1953 | -16.7°C30 Oct 1925 | 85 mm10 Oct 1954 | 196 mm1960 · driest 0 mm in 1952 | 110 |
| November | 26.1°C1 Nov 1933 | -21.7°C29 Nov 1929 | 116 mm17 Nov 1952 | 156 mm1961 · driest 1 mm in 1914 | 109 |
| December | 21.1°C5 Dec 1998 | -31.7°C24 Dec 1983 | 80 mm15 Dec 1971 | 155 mm1971 · driest 0 mm in 1901 | 109 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 30 | <1 | 4 |
| February | 0 | 0 | 26 | <1 | 4 |
| March | <1 | 0 | 24 | 2 | 2 |
| April | 3 | <1 | 8 | 3 | <1 |
| May | 10 | 2 | <1 | 4 | <1 |
| June | 21 | 7 | 0 | 4 | 0 |
| July | 26 | 9 | 0 | 4 | 0 |
| August | 24 | 6 | 0 | 4 | 0 |
| September | 14 | 3 | <1 | 3 | 0 |
| October | 4 | <1 | 8 | 2 | <1 |
| November | <1 | 0 | 21 | 2 | <1 |
| December | 0 | 0 | 29 | <1 | 4 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 0% | 16% | 3% | 11% | -6.3–2.6°C |
| February | 0% | 17% | 4% | 12% | -3.0–4.6°C |
| March | 5% | 22% | 6% | 21% | 3.9–11.4°C |
| April | 23% | 26% | 11% | 30% | 13.1–18.9°C |
| May | 51% | 30% | 12% | 38% | 19.5–25.5°C |
| June | 69% | 28% | 13% | 32% | 24.6–29.8°C |
| July | 76% | 24% | 11% | 23% | 27.7–32.6°C |
| August | 77% | 23% | 11% | 23% | 26.0–31.0°C |
| September | 65% | 23% | 10% | 24% | 22.1–27.0°C |
| October | 35% | 20% | 7% | 20% | 15.2–20.8°C |
| November | 4% | 18% | 7% | 15% | 5.5–11.7°C |
| December | 0% | 17% | 4% | 12% | -3.3–4.7°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