September
September · June · August
United States · 1991–2020
September leads for comfortable weather in Sigourney: typically 24.6°C by day, 11.2°C at night, with 85 mm of rain. Based on measured 1991–2020 NOAA station history.
September · June · August
July · August · June
October · September · May
The weakest month is January, scoring 5 against September’s 81 — days reach only -1.2°C, 25° 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 | -1.2°C | -11°C | 29 mm | 4.6 | 9 h 30 | 5 | Strong coverage |
| February | 1.4°C | -9.2°C | 38 mm | 5.4 | 10 h 33 | 5 | Strong coverage |
| March | 8.6°C | -3°C | 60 mm | 6.5 | 11 h 48 | 10 | Strong coverage |
| April | 15.9°C | 3.1°C | 93 mm | 8.5 | 13 h 15 | 39 | Strong coverage |
| May | 21.7°C | 9.8°C | 128 mm | 10.8 | 14 h 29 | 63 | Strong coverage |
| June | 26.9°C | 15.3°C | 135 mm | 10.1 | 15 h 09 | 69 | Strong coverage |
| July | 29.2°C | 17.4°C | 98 mm | 6.9 | 14 h 53 | 66 | Strong coverage |
| August | 28.2°C | 16.1°C | 120 mm | 8 | 13 h 50 | 68 | Strong coverage |
| September | 24.6°C | 11.2°C | 85 mm | 6.6 | 12 h 25 | 81 | Strong coverage |
| October | 17.5°C | 4.6°C | 69 mm | 6.7 | 11 h 01 | 52 | Strong coverage |
| November | 9°C | -2°C | 57 mm | 5.3 | 9 h 48 | 15 | Strong coverage |
| December | 1.9°C | -7.6°C | 40 mm | 5 | 9 h 12 | 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 | 21.1°C31 Jan 1989 | -35.6°C31 Jan 2019 | 43 mm20 Jan 1904 | 108 mm2024 · driest 0 mm in 2016 | 130 |
| February | 25.0°C23 Feb 2017 | -34.4°C13 Feb 1905 | 42 mm14 Feb 1911 | 125 mm1911 · driest 0 mm in 1970 | 130 |
| March | 32.8°C22 Mar 2026 | -28.9°C1 Mar 1962 | 57 mm19 Mar 1982 | 156 mm1982 · driest 1 mm in 1965 | 129 |
| April | 33.9°C30 Apr 1965 | -13.9°C6 Apr 1982 | 125 mm18 Apr 2013 | 228 mm2013 · driest 3 mm in 2018 | 127 |
| May | 41.1°C31 May 1934 | -4.4°C4 May 1907 | 92 mm10 May 1996 | 301 mm1996 · driest 12 mm in 1992 | 129 |
| June | 40.6°C26 Jun 1934 | 1.7°C12 Jun 1903 | 136 mm12 Jun 1946 | 295 mm2010 · driest 14 mm in 1988 | 128 |
| July | 45.0°C22 Jul 1901 | 7.2°C10 Jul 1945 | 98 mm26 Jul 1992 | 350 mm1992 · driest 5 mm in 1975 | 129 |
| August | 43.9°C8 Aug 1934 | 3.9°C30 Aug 1915 | 121 mm30 Aug 1965 | 303 mm2009 · driest 6 mm in 2020 | 129 |
| September | 39.4°C6 Sep 1899 | -8.9°C22 Sep 1913 | 89 mm10 Sep 1992 | 306 mm1965 · driest 0 mm in 2017 | 130 |
| October | 35.0°C4 Oct 1938 | -15.6°C30 Oct 1925 | 69 mm6 Oct 2018 | 213 mm1941 · driest 0 mm in 1964 | 128 |
| November | 27.2°C2 Nov 1938 | -22.8°C26 Nov 1898 | 66 mm16 Nov 1961 | 198 mm1961 · driest 0 mm in 1904 | 127 |
| December | 23.3°C16 Dec 2021 | -34.4°C28 Dec 1924 | 59 mm14 Dec 2015 | 114 mm2015 · driest 1 mm in 1958 | 126 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 30 | <1 | 4 |
| February | 0 | 0 | 26 | 1 | 4 |
| March | <1 | 0 | 22 | 2 | 2 |
| April | 3 | <1 | 8 | 3 | <1 |
| May | 10 | 1 | <1 | 4 | 0 |
| June | 22 | 7 | 0 | 4 | 0 |
| July | 27 | 13 | 0 | 3 | 0 |
| August | 26 | 10 | 0 | 3 | 0 |
| September | 15 | 5 | <1 | 3 | 0 |
| October | 4 | <1 | 6 | 2 | <1 |
| November | <1 | 0 | 19 | 2 | <1 |
| December | 0 | 0 | 28 | 1 | 3 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 0% | 14% | 3% | 8% | -5.0–3.2°C |
| February | <1% | 16% | 3% | 12% | -2.8–5.8°C |
| March | 8% | 22% | 6% | 22% | 4.5–12.9°C |
| April | 25% | 28% | 9% | 35% | 13.8–19.6°C |
| May | 51% | 32% | 12% | 40% | 19.9–25.9°C |
| June | 67% | 31% | 12% | 36% | 25.3–30.2°C |
| July | 76% | 24% | 10% | 24% | 28.0–32.9°C |
| August | 76% | 24% | 10% | 23% | 26.9–31.8°C |
| September | 67% | 24% | 10% | 25% | 22.7–27.6°C |
| October | 38% | 20% | 7% | 20% | 15.7–22.0°C |
| November | 7% | 18% | 6% | 14% | 6.1–12.9°C |
| December | <1% | 16% | 4% | 12% | -1.9–5.4°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