September
September · May · October
United States · 1991–2020
September leads for comfortable weather in Lindbloom Park (historical): typically 27.4°C by day, 14.1°C at night, with 84 mm of rain. Based on measured 1991–2020 NOAA station history.
September · May · October
July · August · June
October · April · November
The weakest month is January, scoring 5 against September’s 78 — days reach only 5°C, 19° below the 24°C the score treats as ideal, and nights drop to -6.9°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 | 5°C | -6.9°C | 20 mm | 3.3 | 9 h 42 | 5 | Good coverage |
| February | 7.3°C | -5°C | 31 mm | 3.8 | 10 h 40 | 8 | Good coverage |
| March | 13.9°C | 0.8°C | 57 mm | 6.7 | 11 h 50 | 35 | Good coverage |
| April | 19.8°C | 6.3°C | 99 mm | 8.3 | 13 h 10 | 57 | Good coverage |
| May | 24.8°C | 12.3°C | 122 mm | 9.3 | 14 h 17 | 75 | Good coverage |
| June | 30°C | 17.9°C | 126 mm | 8.7 | 14 h 53 | 57 | Good coverage |
| July | 32.6°C | 20.4°C | 97 mm | 6.7 | 14 h 39 | 50 | Good coverage |
| August | 31.9°C | 19.1°C | 118 mm | 7.1 | 13 h 41 | 51 | Good coverage |
| September | 27.4°C | 14.1°C | 84 mm | 6.1 | 12 h 24 | 78 | Good coverage |
| October | 20.2°C | 7°C | 82 mm | 6.7 | 11 h 06 | 63 | Good coverage |
| November | 13.6°C | 0.6°C | 41 mm | 3.9 | 9 h 59 | 38 | Good coverage |
| December | 6.5°C | -5.1°C | 35 mm | 3.4 | 9 h 27 | 6 | Good coverage |
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 26.1°C28 Jan 2015 | -24.9°C6 Jan 2014 | 31 mm3 Jan 1949 | 113 mm1949 · driest 0 mm in 2012 | 48 |
| February | 27.2°C26 Feb 2024 | -29.3°C16 Feb 2021 | 36 mm3 Feb 2012 | 77 mm2001 · driest 0 mm in 2006 | 49 |
| March | 35.0°C21 Mar 2026 | -22.2°C12 Mar 1998 | 60 mm4 Mar 2004 | 203 mm1961 · driest 5 mm in 1955 | 48 |
| April | 35.0°C25 Apr 2012 | -8.8°C8 Apr 2007 | 97 mm1 Apr 1967 | 233 mm1999 · driest 17 mm in 1963 | 49 |
| May | 36.1°C21 May 1956 | -2.2°C3 May 2005 | 164 mm6 May 2007 | 273 mm2015 · driest 16 mm in 1966 | 49 |
| June | 41.7°C28 Jun 2012 | 4.4°C6 Jun 1998 | 127 mm13 Jun 1965 | 398 mm1965 · driest 9 mm in 2023 | 49 |
| July | 43.9°C13 Jul 1954 | 9.4°C3 Jul 2014 | 118 mm10 Jul 1957 | 359 mm1968 · driest 12 mm in 1999 | 48 |
| August | 44.4°C2 Aug 2011 | 8.3°C31 Aug 2009 | 112 mm23 Aug 2004 | 260 mm2019 · driest 18 mm in 1969 | 48 |
| September | 42.8°C2 Sep 2000 | 1.7°C29 Sep 2003 | 93 mm3 Sep 2021 | 205 mm1970 · driest 17 mm in 1954 | 48 |
| October | 35.6°C10 Oct 1963 | -7.7°C19 Oct 2022 | 121 mm7 Oct 1958 | 177 mm1998 · driest 0 mm in 2024 | 48 |
| November | 28.9°C8 Nov 2006 | -16.0°C12 Nov 2019 | 103 mm1 Nov 1998 | 186 mm1998 · driest 0 mm in 1954 | 48 |
| December | 24.4°C15 Dec 2021 | -24.3°C18 Dec 2016 | 56 mm24 Dec 2023 | 94 mm2023 · driest 2 mm in 2010 | 47 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) |
|---|---|---|---|---|
| January | 0 | 0 | 28 | <1 |
| February | <1 | 0 | 23 | 1 |
| March | 2 | <1 | 15 | 2 |
| April | 7 | <1 | 5 | 3 |
| May | 16 | 6 | <1 | 4 |
| June | 27 | 16 | 0 | 4 |
| July | 30 | 23 | 0 | 3 |
| August | 29 | 21 | 0 | 4 |
| September | 21 | 10 | 0 | 3 |
| October | 7 | 2 | 4 | 2 |
| November | 1 | 0 | 15 | 1 |
| December | 0 | 0 | 27 | 1 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 1% | 12% | 2% | 6% | 0.1–7.2°C |
| February | 5% | 14% | 3% | 9% | 2.7–11.7°C |
| March | 19% | 21% | 6% | 20% | 8.8–17.3°C |
| April | 39% | 26% | 10% | 25% | 16.7–22.1°C |
| May | 58% | 29% | 12% | 35% | 21.9–26.5°C |
| June | 70% | 29% | 13% | 37% | 27.1–32.2°C |
| July | 77% | 23% | 10% | 19% | 29.5–34.6°C |
| August | 79% | 21% | 10% | 20% | 29.0–33.9°C |
| September | 75% | 21% | 9% | 19% | 24.2–30.0°C |
| October | 48% | 19% | 7% | 19% | 17.4–23.1°C |
| November | 17% | 13% | 4% | 9% | 9.7–15.8°C |
| December | 2% | 13% | 3% | 7% | 3.6–9.5°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