September
September · August · June
United States · 1991–2020
September leads for comfortable weather in Ackworth: typically 24.9°C by day, 11.3°C at night, with 96 mm of rain. Based on measured 1991–2020 NOAA station history.
September · August · June
July · August · June
October · September · May
The weakest month is January, scoring 5 against September’s 79 — days reach only -0.5°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 | -0.5°C | -11.2°C | 23 mm | 3.9 | 9 h 29 | 5 | Strong coverage |
| February | 2.1°C | -9.1°C | 35 mm | 5.3 | 10 h 33 | 5 | Strong coverage |
| March | 9.4°C | -2.6°C | 51 mm | 6 | 11 h 48 | 15 | Strong coverage |
| April | 16.3°C | 3.4°C | 102 mm | 8.3 | 13 h 16 | 39 | Strong coverage |
| May | 21.9°C | 10°C | 141 mm | 10.6 | 14 h 29 | 62 | Strong coverage |
| June | 27.1°C | 15.6°C | 143 mm | 9.8 | 15 h 09 | 68 | Strong coverage |
| July | 29.3°C | 17.8°C | 108 mm | 7.4 | 14 h 53 | 63 | Strong coverage |
| August | 28.4°C | 16.4°C | 97 mm | 7.7 | 13 h 50 | 70 | Strong coverage |
| September | 24.9°C | 11.3°C | 96 mm | 6.6 | 12 h 25 | 79 | Strong coverage |
| October | 17.8°C | 4.6°C | 71 mm | 6.2 | 11 h 01 | 53 | Strong coverage |
| November | 9.4°C | -2.2°C | 47 mm | 4.9 | 9 h 48 | 17 | Strong coverage |
| December | 2.3°C | -8°C | 36 mm | 4.7 | 9 h 12 | 5 | Strong coverage |
What has changed
Each bar compares the 2011–2025 daytime average for that month against the same month in 1961–1990, measured at the same station. Months where the older record is too thin to compare are left blank.
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 21.1°C9 Jan 2003 | -36.1°C31 Jan 2019 | 61 mm12 Jan 1960 | 97 mm1960 · driest 0 mm in 1981 | 128 |
| February | 26.1°C24 Feb 1930 | -37.2°C3 Feb 1996 | 48 mm17 Feb 1911 | 117 mm1911 · driest 1 mm in 1931 | 129 |
| March | 31.7°C29 Mar 1895 | -28.9°C1 Mar 1962 | 52 mm15 Mar 1945 | 154 mm2009 · driest 0 mm in 1994 | 129 |
| April | 33.3°C10 Apr 1930 | -18.9°C6 Apr 1982 | 87 mm18 Apr 2013 | 221 mm1991 · driest 4 mm in 1985 | 128 |
| May | 41.1°C30 May 1934 | -6.1°C1 May 1909 | 86 mm11 May 1912 | 283 mm1996 · driest 12 mm in 1939 | 129 |
| June | 40.6°C26 Jun 1934 | 2.2°C4 Jun 1945 | 144 mm5 Jun 1947 | 428 mm2010 · driest 4 mm in 1911 | 129 |
| July | 44.4°C19 Jul 1934 | 4.4°C31 Jul 1971 | 143 mm29 Jul 2015 | 281 mm2008 · driest 1 mm in 1975 | 128 |
| August | 45.0°C8 Aug 1934 | 3.3°C31 Aug 1967 | 226 mm26 Aug 1977 | 377 mm1977 · driest 0 mm in 1947 | 128 |
| September | 40.0°C8 Sep 1947 | -5.0°C29 Sep 1899 | 173 mm2 Sep 1909 | 311 mm1941 · driest 7 mm in 2002 | 127 |
| October | 35.0°C2 Oct 1953 | -15.6°C30 Oct 1925 | 100 mm11 Oct 1973 | 206 mm1941 · driest 0 mm in 1952 | 126 |
| November | 27.8°C1 Nov 1938 | -23.9°C28 Nov 1896 | 107 mm17 Nov 1952 | 167 mm1931 · driest 1 mm in 1904 | 127 |
| December | 21.1°C6 Dec 1939 | -32.2°C23 Dec 1989 | 67 mm17 Dec 1895 | 121 mm2015 · driest 0 mm in 1986 | 128 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 30 | <1 | 4 |
| February | 0 | 0 | 25 | 1 | 4 |
| March | <1 | 0 | 21 | 2 | 2 |
| April | 3 | <1 | 9 | 3 | <1 |
| May | 11 | 2 | <1 | 5 | <1 |
| June | 22 | 8 | 0 | 4 | 0 |
| July | 28 | 13 | 0 | 3 | 0 |
| August | 26 | 11 | 0 | 3 | 0 |
| September | 16 | 5 | <1 | 3 | 0 |
| October | 5 | <1 | 7 | 2 | <1 |
| November | <1 | 0 | 20 | 1 | <1 |
| December | 0 | 0 | 28 | 1 | 3 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | <1% | 14% | 3% | 8% | -5.2–3.7°C |
| February | <1% | 16% | 3% | 11% | -2.8–6.3°C |
| March | 9% | 20% | 5% | 18% | 4.7–13.1°C |
| April | 27% | 27% | 9% | 33% | 13.7–20.0°C |
| May | 51% | 31% | 12% | 39% | 20.2–25.8°C |
| June | 68% | 30% | 13% | 34% | 25.1–30.1°C |
| July | 78% | 22% | 10% | 21% | 28.2–33.5°C |
| August | 77% | 23% | 10% | 23% | 27.3–31.8°C |
| September | 67% | 23% | 10% | 24% | 22.8–28.2°C |
| October | 40% | 20% | 7% | 19% | 15.9–22.1°C |
| November | 7% | 16% | 5% | 11% | 6.2–12.9°C |
| December | <1% | 15% | 3% | 11% | -1.7–5.7°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