September
September · May · October
United States · 1991–2020
September leads for comfortable weather in White City: typically 26.9°C by day, 13.5°C at night, with 77 mm of rain. Based on measured 1991–2020 NOAA station history.
September · May · October
June · July · August
October · April · May
The weakest month is January, scoring 5 against September’s 79 — days reach only 4.5°C, 19° below the 24°C the score treats as ideal, and nights drop to -8°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 | 4.5°C | -8°C | 21 mm | 3.2 | 9 h 43 | 5 | Strong coverage |
| February | 7.2°C | -6°C | 31 mm | 3.5 | 10 h 41 | 6 | Strong coverage |
| March | 13.3°C | -0.4°C | 57 mm | 5.7 | 11 h 50 | 31 | Strong coverage |
| April | 18.8°C | 5.1°C | 84 mm | 6.9 | 13 h 09 | 55 | Strong coverage |
| May | 23.8°C | 11.5°C | 123 mm | 8.6 | 14 h 16 | 76 | Strong coverage |
| June | 29.5°C | 17.2°C | 114 mm | 7.3 | 14 h 52 | 63 | Strong coverage |
| July | 32.3°C | 19.8°C | 109 mm | 7.5 | 14 h 38 | 49 | Strong coverage |
| August | 31.4°C | 18.6°C | 111 mm | 7 | 13 h 41 | 55 | Strong coverage |
| September | 26.9°C | 13.5°C | 77 mm | 5.8 | 12 h 23 | 79 | Strong coverage |
| October | 20.3°C | 6°C | 60 mm | 5.3 | 11 h 07 | 66 | Strong coverage |
| November | 12.4°C | -0.7°C | 40 mm | 3.9 | 10 h 00 | 32 | Strong coverage |
| December | 5.8°C | -6.2°C | 31 mm | 3.7 | 9 h 28 | 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 | 25.6°C10 Jan 1990 | -30.0°C16 Jan 2024 | 33 mm16 Jan 2017 | 119 mm1949 · driest 0 mm in 2012 | 100 |
| February | 27.8°C29 Feb 1972 | -27.2°C1 Feb 1979 | 65 mm21 Feb 1997 | 104 mm1997 · driest 0 mm in 2006 | 97 |
| March | 35.6°C22 Mar 2026 | -22.8°C4 Mar 1978 | 55 mm29 Mar 2017 | 232 mm1973 · driest 1 mm in 1966 | 98 |
| April | 36.1°C12 Apr 1996 | -13.3°C3 Apr 1975 | 95 mm27 Apr 2009 | 235 mm1944 · driest 13 mm in 1992 | 100 |
| May | 37.2°C31 May 1934 | -3.3°C3 May 1976 | 149 mm11 May 1929 | 303 mm1995 · driest 25 mm in 1966 | 97 |
| June | 43.9°C27 Jun 1980 | 3.3°C6 Jun 1998 | 127 mm10 Jun 1965 | 413 mm1965 · driest 0 mm in 1933 | 98 |
| July | 43.9°C10 Jul 1980 | 6.7°C5 Jul 1972 | 140 mm11 Jul 1951 | 333 mm1951 · driest 0 mm in 1940 | 100 |
| August | 44.4°C9 Aug 1936 | 6.7°C30 Aug 2009 | 107 mm31 Aug 2003 | 282 mm2005 · driest 6 mm in 1934 | 98 |
| September | 42.8°C3 Sep 2000 | -2.2°C22 Sep 1995 | 137 mm28 Sep 1945 | 282 mm1962 · driest 1 mm in 1956 | 98 |
| October | 35.6°C4 Oct 2006 | -11.7°C31 Oct 1993 | 164 mm7 Oct 1967 | 268 mm1941 · driest 0 mm in 1952 | 99 |
| November | 30.6°C8 Nov 1980 | -20.0°C13 Nov 1940 | 91 mm3 Nov 1938 | 174 mm1931 · driest 0 mm in 1989 | 99 |
| December | 23.9°C6 Dec 1939 | -30.6°C22 Dec 1989 | 88 mm11 Dec 2007 | 129 mm2007 · driest 0 mm in 1976 | 100 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 29 | <1 | 2 |
| February | 0 | 0 | 24 | <1 | 2 |
| March | 2 | 0 | 18 | 2 | <1 |
| April | 6 | <1 | 6 | 3 | <1 |
| May | 15 | 4 | <1 | 4 | 0 |
| June | 26 | 15 | 0 | 4 | 0 |
| July | 30 | 23 | 0 | 3 | 0 |
| August | 29 | 20 | 0 | 3 | 0 |
| September | 20 | 10 | <1 | 2 | 0 |
| October | 8 | 2 | 5 | 2 | <1 |
| November | <1 | 0 | 18 | <1 | <1 |
| December | 0 | 0 | 28 | <1 | 2 |
The best month has moved. On the 1961–1990 numbers the strongest month here was May (scoring 79); on 2011–2025 it is September (81). Both are scored the same way, from the same station — only the climate underneath changed.
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | <1% | 11% | 2% | 6% | 0.0–8.5°C |
| February | 6% | 13% | 3% | 8% | 3.0–12.3°C |
| March | 21% | 19% | 7% | 16% | 9.4–17.3°C |
| April | 44% | 23% | 8% | 25% | 16.6–22.4°C |
| May | 61% | 29% | 11% | 33% | 21.9–26.7°C |
| June | 73% | 26% | 13% | 29% | 27.5–32.0°C |
| July | 78% | 22% | 9% | 22% | 30.7–35.6°C |
| August | 78% | 22% | 9% | 23% | 29.5–35.1°C |
| September | 76% | 20% | 9% | 18% | 24.6–30.8°C |
| October | 56% | 17% | 7% | 14% | 18.3–24.0°C |
| November | 14% | 14% | 4% | 9% | 9.2–15.6°C |
| December | 1% | 12% | 3% | 7% | 2.8–9.5°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