September
September · June · August
United States · 1991–2020
September leads for comfortable weather in Brush Lake (historical): typically 24.8°C by day, 12°C at night, with 85 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 81 — days reach only 1.5°C, 22° 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 | 1.5°C | -7°C | 80 mm | 9.8 | 9 h 36 | 5 | Strong coverage |
| February | 3.7°C | -5.6°C | 60 mm | 7.7 | 10 h 37 | 5 | Strong coverage |
| March | 9°C | -1.5°C | 78 mm | 8.8 | 11 h 49 | 10 | Strong coverage |
| April | 16.3°C | 4.2°C | 112 mm | 10.8 | 13 h 13 | 37 | Strong coverage |
| May | 22°C | 10.1°C | 128 mm | 11.9 | 14 h 23 | 63 | Strong coverage |
| June | 27.1°C | 15.3°C | 109 mm | 10 | 15 h 01 | 73 | Strong coverage |
| July | 29.2°C | 17.1°C | 137 mm | 8.9 | 14 h 46 | 59 | Strong coverage |
| August | 28.4°C | 16°C | 91 mm | 7.5 | 13 h 45 | 72 | Strong coverage |
| September | 24.8°C | 12°C | 85 mm | 7.3 | 12 h 24 | 81 | Strong coverage |
| October | 17.8°C | 5.8°C | 72 mm | 7.9 | 11 h 04 | 53 | Strong coverage |
| November | 10.2°C | 0.5°C | 80 mm | 8.3 | 9 h 54 | 17 | Strong coverage |
| December | 3.9°C | -4°C | 83 mm | 9.1 | 9 h 19 | 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 | 23.3°C21 Jan 1906 | -32.2°C20 Jan 1985 | 88 mm21 Jan 1959 | 311 mm1937 · driest 13 mm in 1944 | 130 |
| February | 23.3°C25 Feb 2017 | -30.0°C13 Feb 1899 | 64 mm26 Feb 1929 | 154 mm2019 · driest 3 mm in 1987 | 130 |
| March | 30.0°C25 Mar 1929 | -23.9°C1 Mar 1967 | 79 mm25 Mar 1913 | 267 mm1913 · driest 1 mm in 1910 | 130 |
| April | 34.4°C24 Apr 1925 | -11.7°C1 Apr 1923 | 69 mm7 Apr 2000 | 242 mm2002 · driest 15 mm in 1962 | 131 |
| May | 38.3°C27 May 1911 | -4.4°C10 May 1906 | 97 mm19 May 2020 | 241 mm2011 · driest 24 mm in 1939 | 130 |
| June | 38.3°C28 Jun 1934 | 1.7°C5 Jun 1954 | 95 mm20 Jun 1973 | 241 mm1939 · driest 25 mm in 1936 | 130 |
| July | 43.3°C14 Jul 1936 | 5.0°C20 Jul 1947 | 111 mm20 Jul 1946 | 346 mm1992 · driest 11 mm in 1982 | 128 |
| August | 38.9°C5 Aug 1918 | 2.2°C29 Aug 1965 | 95 mm30 Aug 2003 | 216 mm1926 · driest 1 mm in 1996 | 128 |
| September | 38.3°C3 Sep 1913 | -2.2°C21 Sep 1956 | 91 mm9 Sep 1990 | 224 mm1926 · driest 5 mm in 1963 | 129 |
| October | 32.2°C3 Oct 2019 | -10.0°C29 Oct 1925 | 89 mm7 Oct 1911 | 192 mm1911 · driest 3 mm in 1963 | 129 |
| November | 26.1°C1 Nov 1950 | -23.3°C30 Nov 1958 | 68 mm30 Nov 1927 | 256 mm1985 · driest 4 mm in 1904 | 129 |
| December | 22.2°C4 Dec 1982 | -30.0°C22 Dec 1989 | 59 mm22 Dec 2013 | 177 mm1990 · driest 9 mm in 1958 | 129 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 25 | 2 | 2 |
| February | 0 | 0 | 24 | 2 | 1 |
| March | <1 | 0 | 19 | 3 | <1 |
| April | 2 | 0 | 6 | 4 | <1 |
| May | 10 | 3 | <1 | 4 | 0 |
| June | 21 | 9 | 0 | 4 | 0 |
| July | 28 | 14 | 0 | 4 | 0 |
| August | 27 | 10 | 0 | 3 | 0 |
| September | 15 | 5 | 0 | 3 | 0 |
| October | 4 | <1 | 4 | 2 | <1 |
| November | <1 | 0 | 15 | 3 | <1 |
| December | 0 | 0 | 24 | 3 | 1 |
The best month has moved. On the 1961–1990 numbers the strongest month here was September (scoring 84); on 2011–2025 it is June (83). 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% | 31% | 8% | 33% | -1.9–5.5°C |
| February | <1% | 28% | 7% | 27% | -0.5–7.1°C |
| March | 6% | 33% | 11% | 36% | 5.9–13.6°C |
| April | 20% | 36% | 12% | 45% | 13.6–19.1°C |
| May | 44% | 37% | 14% | 45% | 19.2–25.2°C |
| June | 64% | 33% | 13% | 37% | 25.1–29.2°C |
| July | 69% | 31% | 14% | 29% | 27.5–31.5°C |
| August | 72% | 27% | 11% | 25% | 26.5–30.3°C |
| September | 65% | 25% | 10% | 20% | 22.7–27.3°C |
| October | 33% | 26% | 8% | 24% | 15.8–20.8°C |
| November | 5% | 29% | 9% | 31% | 7.4–13.1°C |
| December | <1% | 30% | 8% | 31% | 0.4–6.7°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