September
September · May · October
United States · 1991–2020
September leads for comfortable weather in Springfield: typically 27°C by day, 14.8°C at night, with 109 mm of rain. Based on measured 1991–2020 NOAA station history.
September · May · October
July · August · June
October · April · May
The weakest month is January, scoring 5 against September’s 77 — days reach only 6.4°C, 18° below the 24°C the score treats as ideal, and nights drop to -4.5°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 | 6.4°C | -4.5°C | 65 mm | 6 | 9 h 52 | 5 | Strong coverage |
| February | 9.3°C | -2.5°C | 61 mm | 5.8 | 10 h 46 | 14 | Strong coverage |
| March | 14.5°C | 2.1°C | 89 mm | 8.5 | 11 h 51 | 33 | Strong coverage |
| April | 19.8°C | 7.3°C | 120 mm | 8.8 | 13 h 06 | 55 | Strong coverage |
| May | 24.2°C | 12.9°C | 141 mm | 10.1 | 14 h 08 | 74 | Strong coverage |
| June | 29.1°C | 17.9°C | 114 mm | 8.6 | 14 h 42 | 62 | Strong coverage |
| July | 31.6°C | 20.2°C | 98 mm | 7.1 | 14 h 29 | 53 | Strong coverage |
| August | 31.3°C | 19.4°C | 91 mm | 6.8 | 13 h 35 | 57 | Strong coverage |
| September | 27°C | 14.8°C | 109 mm | 6.1 | 12 h 22 | 77 | Strong coverage |
| October | 20.6°C | 8.3°C | 91 mm | 6.9 | 11 h 10 | 65 | Strong coverage |
| November | 13.7°C | 2.1°C | 91 mm | 6.6 | 10 h 07 | 32 | Strong coverage |
| December | 7.9°C | -2.6°C | 66 mm | 6 | 9 h 37 | 8 | 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 | 24.4°C24 Jan 1950 | -25.0°C19 Jan 1984 | 98 mm3 Jan 1950 | 172 mm1950 · driest 2 mm in 1943 | 86 |
| February | 28.9°C23 Feb 2017 | -27.2°C9 Feb 1979 | 79 mm9 Feb 1966 | 192 mm2018 · driest 2 mm in 2006 | 86 |
| March | 32.2°C21 Mar 2026 | -22.2°C7 Mar 1943 | 100 mm18 Mar 2008 | 239 mm2008 · driest 13 mm in 1956 | 86 |
| April | 33.9°C21 Apr 1963 | -7.8°C13 Apr 1957 | 110 mm29 Apr 2017 | 338 mm2025 · driest 4 mm in 1989 | 86 |
| May | 33.9°C16 May 1972 | -1.7°C6 May 1944 | 109 mm22 May 2020 | 410 mm1943 · driest 39 mm in 2005 | 86 |
| June | 38.3°C27 Jun 1954 | 5.6°C1 Jun 1966 | 122 mm9 Jun 1975 | 341 mm2008 · driest 6 mm in 1991 | 86 |
| July | 45.0°C14 Jul 1954 | 6.7°C21 Jul 1970 | 115 mm4 Jul 1983 | 476 mm1958 · driest 8 mm in 2012 | 86 |
| August | 42.2°C2 Aug 2011 | 6.7°C12 Aug 1967 | 86 mm15 Aug 1976 | 218 mm1982 · driest 5 mm in 2025 | 86 |
| September | 40.0°C4 Sep 1947 | -1.1°C27 Sep 1942 | 128 mm24 Sep 1993 | 444 mm1993 · driest 3 mm in 2004 | 86 |
| October | 33.9°C2 Oct 1976 | -7.8°C31 Oct 1993 | 139 mm21 Oct 1949 | 254 mm2009 · driest 11 mm in 1963 | 86 |
| November | 28.3°C8 Nov 2023 | -15.6°C17 Nov 1959 | 159 mm24 Nov 1987 | 311 mm1985 · driest 5 mm in 1989 | 86 |
| December | 25.0°C27 Dec 2025 | -26.7°C23 Dec 1989 | 153 mm26 Dec 2015 | 291 mm2015 · driest 3 mm in 1950 | 86 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 25 | 2 | 3 |
| February | <1 | 0 | 20 | 2 | 2 |
| March | 2 | 0 | 12 | 3 | 1 |
| April | 7 | <1 | 3 | 4 | <1 |
| May | 16 | 3 | <1 | 5 | 0 |
| June | 27 | 15 | 0 | 4 | 0 |
| July | 30 | 23 | 0 | 3 | 0 |
| August | 30 | 21 | 0 | 3 | 0 |
| September | 21 | 9 | 0 | 3 | 0 |
| October | 8 | 1 | 2 | 3 | <1 |
| November | <1 | 0 | 12 | 3 | <1 |
| December | 0 | 0 | 22 | 2 | 2 |
The best month has moved. On the 1961–1990 numbers the strongest month here was May (scoring 82); on 2011–2025 it is September (80). 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 | 2% | 19% | 5% | 15% | 2.9–9.2°C |
| February | 7% | 22% | 7% | 20% | 4.6–12.5°C |
| March | 20% | 27% | 10% | 31% | 10.4–17.1°C |
| April | 40% | 29% | 12% | 36% | 17.4–22.3°C |
| May | 59% | 31% | 14% | 40% | 22.1–26.1°C |
| June | 71% | 29% | 14% | 34% | 27.0–31.2°C |
| July | 78% | 22% | 9% | 19% | 29.5–33.8°C |
| August | 79% | 21% | 9% | 21% | 29.2–33.6°C |
| September | 73% | 22% | 10% | 22% | 24.5–29.4°C |
| October | 50% | 22% | 9% | 22% | 18.6–23.5°C |
| November | 16% | 21% | 9% | 19% | 10.5–15.9°C |
| December | 3% | 20% | 7% | 19% | 4.8–11.0°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