September
September · May · June
United States · 1991–2020
September leads for comfortable weather in Birdtown: typically 26.8°C by day, 11.4°C at night, with 100 mm of rain. Based on measured 1991–2020 NOAA station history.
September · May · June
August · July · June
October · April · May
The weakest month is January, scoring 5 against September’s 71 — days reach only 9.3°C, 15° below the 24°C the score treats as ideal, and nights drop to -4.6°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 | 9.3°C | -4.6°C | 137 mm | 9.2 | 10 h 00 | 5 | Strong coverage |
| February | 11.7°C | -3.2°C | 123 mm | 9 | 10 h 51 | 9 | Strong coverage |
| March | 16.1°C | -0.1°C | 129 mm | 10.4 | 11 h 52 | 27 | Strong coverage |
| April | 21.3°C | 4.3°C | 116 mm | 8.8 | 13 h 02 | 55 | Strong coverage |
| May | 25°C | 9.3°C | 108 mm | 9.7 | 14 h 01 | 70 | Strong coverage |
| June | 28°C | 13.6°C | 117 mm | 10.6 | 14 h 32 | 66 | Strong coverage |
| July | 29.5°C | 15.7°C | 126 mm | 12.2 | 14 h 20 | 60 | Strong coverage |
| August | 29.1°C | 14.9°C | 113 mm | 10.3 | 13 h 30 | 66 | Strong coverage |
| September | 26.8°C | 11.4°C | 100 mm | 7.7 | 12 h 21 | 71 | Strong coverage |
| October | 21.7°C | 4.8°C | 75 mm | 6.1 | 11 h 14 | 66 | Strong coverage |
| November | 16°C | -0.8°C | 101 mm | 7.6 | 10 h 15 | 32 | Strong coverage |
| December | 10.8°C | -2.9°C | 133 mm | 9.2 | 9 h 46 | 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 | 23.9°C31 Jan 2002 | -30.6°C21 Jan 1985 | 127 mm31 Jan 2010 | 317 mm1998 · driest 10 mm in 2026 | 68 |
| February | 26.7°C24 Feb 1996 | -22.2°C26 Feb 1967 | 102 mm4 Feb 2022 | 287 mm2019 · driest 13 mm in 1978 | 67 |
| March | 29.4°C31 Mar 1985 | -20.0°C3 Mar 1980 | 128 mm17 Mar 1990 | 387 mm1963 · driest 9 mm in 2026 | 66 |
| April | 32.8°C28 Apr 1986 | -10.0°C1 Apr 1987 | 84 mm5 Apr 1977 | 238 mm1998 · driest 6 mm in 1976 | 66 |
| May | 38.9°C22 May 1996 | -5.6°C4 May 1988 | 81 mm28 May 1973 | 263 mm1984 · driest 2 mm in 2019 | 67 |
| June | 35.0°C30 Jun 2012 | 0.0°C1 Jun 1972 | 84 mm27 Jun 1994 | 290 mm1994 · driest 25 mm in 2022 | 66 |
| July | 36.7°C9 Jul 1993 | 4.4°C2 Jul 1988 | 94 mm13 Jul 1984 | 250 mm1984 · driest 3 mm in 2006 | 65 |
| August | 37.8°C22 Aug 1983 | 3.3°C29 Aug 2011 | 90 mm9 Aug 1991 | 301 mm1991 · driest 13 mm in 1987 | 64 |
| September | 35.6°C7 Sep 1998 | -5.0°C24 Sep 1999 | 98 mm17 Sep 2004 | 239 mm2004 · driest 5 mm in 2007 | 64 |
| October | 32.2°C4 Oct 1998 | -8.3°C22 Oct 1987 | 90 mm5 Oct 1972 | 228 mm1972 · driest 0 mm in 1963 | 65 |
| November | 28.9°C4 Nov 2003 | -13.9°C25 Nov 1970 | 100 mm19 Nov 2003 | 208 mm1986 · driest 2 mm in 2006 | 67 |
| December | 24.4°C22 Dec 1967 | -22.2°C25 Dec 1983 | 104 mm12 Dec 1961 | 319 mm1961 · driest 8 mm in 1965 | 67 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 23 | 4 | 1 |
| February | <1 | 0 | 20 | 4 | 1 |
| March | 2 | 0 | 16 | 4 | <1 |
| April | 9 | <1 | 6 | 4 | 0 |
| May | 19 | 3 | 1 | 3 | 0 |
| June | 25 | 9 | 0 | 4 | 0 |
| July | 28 | 15 | 0 | 4 | 0 |
| August | 28 | 13 | 0 | 4 | 0 |
| September | 22 | 6 | <1 | 4 | 0 |
| October | 9 | <1 | 7 | 2 | 0 |
| November | <1 | 0 | 18 | 3 | <1 |
| December | 0 | 0 | 22 | 4 | <1 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 1% | 32% | 14% | 41% | 6.1–11.6°C |
| February | 5% | 33% | 16% | 47% | 8.0–14.7°C |
| March | 22% | 34% | 15% | 44% | 12.9–18.6°C |
| April | 46% | 31% | 13% | 39% | 18.3–23.0°C |
| May | 58% | 34% | 14% | 45% | 22.6–26.5°C |
| June | 65% | 34% | 13% | 49% | 26.0–29.2°C |
| July | 60% | 40% | 15% | 52% | 27.8–30.8°C |
| August | 65% | 35% | 12% | 43% | 27.1–30.8°C |
| September | 72% | 27% | 11% | 26% | 24.7–28.3°C |
| October | 57% | 22% | 9% | 24% | 19.7–23.3°C |
| November | 21% | 27% | 11% | 32% | 13.3–18.8°C |
| December | 3% | 31% | 15% | 39% | 7.8–13.8°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