September
September · May · October
United States · 1991–2020
September leads for comfortable weather in West York: typically 27.4°C by day, 13.2°C at night, with 88 mm of rain. Based on measured 1991–2020 NOAA station history.
September · May · October
August · July · June
October · April · September
The weakest month is January, scoring 5 against September’s 76 — days reach only 4.3°C, 20° 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 | 4.3°C | -5°C | 86 mm | 7.5 | 9 h 42 | 5 | Strong coverage |
| February | 6.9°C | -3.4°C | 63 mm | 6.3 | 10 h 40 | 5 | Strong coverage |
| March | 13.2°C | 1.5°C | 85 mm | 8.1 | 11 h 50 | 29 | Strong coverage |
| April | 20°C | 7°C | 129 mm | 9.6 | 13 h 10 | 53 | Strong coverage |
| May | 24.9°C | 12.8°C | 125 mm | 10.2 | 14 h 18 | 74 | Strong coverage |
| June | 29.6°C | 17.6°C | 129 mm | 9.1 | 14 h 54 | 58 | Strong coverage |
| July | 31°C | 19°C | 101 mm | 7.7 | 14 h 40 | 56 | Strong coverage |
| August | 30.6°C | 17.8°C | 85 mm | 6.4 | 13 h 42 | 63 | Strong coverage |
| September | 27.4°C | 13.2°C | 88 mm | 5.8 | 12 h 24 | 76 | Strong coverage |
| October | 20.8°C | 7.3°C | 94 mm | 6.8 | 11 h 06 | 64 | Strong coverage |
| November | 12.4°C | 1.4°C | 91 mm | 7.4 | 9 h 58 | 25 | Strong coverage |
| December | 6.4°C | -2.6°C | 77 mm | 8.4 | 9 h 26 | 5 | Strong coverage |
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 23.9°C24 Jan 1943 | -29.4°C20 Jan 1985 | 92 mm30 Jan 1916 | 305 mm1950 · driest 5 mm in 1905 | 126 |
| February | 25.0°C29 Feb 1972 | -32.8°C13 Feb 1899 | 69 mm7 Feb 1999 | 193 mm1950 · driest 2 mm in 1947 | 124 |
| March | 31.7°C6 Mar 1983 | -24.4°C6 Mar 1960 | 121 mm5 Mar 1897 | 291 mm1898 · driest 5 mm in 1910 | 124 |
| April | 35.0°C21 Apr 1987 | -7.8°C1 Apr 2001 | 103 mm17 Apr 2006 | 315 mm2011 · driest 24 mm in 1915 | 122 |
| May | 36.7°C20 May 1987 | -2.2°C1 May 1903 | 102 mm8 May 1996 | 285 mm1927 · driest 13 mm in 1903 | 123 |
| June | 42.2°C26 Jun 1954 | 2.2°C7 Jun 1988 | 121 mm7 Jun 2008 | 260 mm1945 · driest 11 mm in 2012 | 125 |
| July | 45.6°C14 Jul 1954 | 5.6°C2 Jul 1924 | 155 mm11 Jul 1958 | 319 mm1958 · driest 1 mm in 1930 | 123 |
| August | 42.2°C8 Aug 1930 | 5.0°C30 Aug 1946 | 125 mm29 Aug 1951 | 253 mm1906 · driest 0 mm in 1897 | 122 |
| September | 41.7°C2 Sep 1953 | -3.3°C26 Sep 1928 | 111 mm10 Sep 2000 | 293 mm1911 · driest 3 mm in 1995 | 123 |
| October | 35.0°C2 Oct 1953 | -8.9°C21 Oct 1952 | 88 mm18 Oct 1905 | 278 mm1919 · driest 3 mm in 1904 | 123 |
| November | 28.9°C1 Nov 1950 | -17.8°C30 Nov 1929 | 104 mm14 Nov 1993 | 290 mm1985 · driest 11 mm in 1999 | 124 |
| December | 23.3°C2 Dec 1982 | -28.9°C28 Dec 1924 | 100 mm3 Dec 1982 | 242 mm1918 · driest 5 mm in 1989 | 125 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 24 | 3 | 3 |
| February | 0 | 0 | 20 | 2 | 2 |
| March | 2 | 0 | 13 | 3 | <1 |
| April | 6 | <1 | 3 | 5 | 0 |
| May | 17 | 5 | 0 | 4 | 0 |
| June | 27 | 15 | 0 | 4 | 0 |
| July | 30 | 21 | 0 | 3 | 0 |
| August | 30 | 19 | 0 | 3 | 0 |
| September | 21 | 9 | <1 | 3 | 0 |
| October | 8 | 2 | 3 | 3 | 0 |
| November | <1 | 0 | 13 | 3 | <1 |
| December | 0 | 0 | 21 | 3 | 2 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | <1% | 24% | 8% | 25% | 0.4–7.3°C |
| February | 2% | 23% | 8% | 24% | 1.8–9.9°C |
| March | 13% | 28% | 11% | 33% | 8.2–16.0°C |
| April | 34% | 31% | 12% | 39% | 16.6–21.9°C |
| May | 60% | 30% | 12% | 37% | 22.1–27.8°C |
| June | 71% | 29% | 12% | 31% | 27.4–32.1°C |
| July | 77% | 23% | 10% | 22% | 29.7–34.4°C |
| August | 79% | 21% | 9% | 20% | 28.8–33.3°C |
| September | 75% | 21% | 9% | 19% | 24.9–30.5°C |
| October | 49% | 20% | 9% | 20% | 18.3–23.9°C |
| November | 11% | 25% | 10% | 24% | 9.2–15.1°C |
| December | <1% | 24% | 9% | 25% | 2.3–9.2°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