September
September · May · October
United States · 1991–2020
September leads for comfortable weather in Redfield: typically 27.4°C by day, 14.6°C at night, with 108 mm of rain. Based on measured 1991–2020 NOAA station history.
September · May · October
August · July · June
October · April · March
The weakest month is January, scoring 5 against September’s 76 — days reach only 5.6°C, 18° below the 24°C the score treats as ideal, and nights drop to -5.4°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 | 5.6°C | -5.4°C | 35 mm | 4.6 | 9 h 48 | 5 | Strong coverage |
| February | 8.8°C | -3.3°C | 41 mm | 4.2 | 10 h 44 | 15 | Strong coverage |
| March | 14.4°C | 1.7°C | 66 mm | 6.1 | 11 h 50 | 37 | Strong coverage |
| April | 19.8°C | 7.2°C | 121 mm | 7.5 | 13 h 07 | 56 | Strong coverage |
| May | 24.7°C | 13.2°C | 151 mm | 9.2 | 14 h 11 | 73 | Strong coverage |
| June | 29.8°C | 18.5°C | 144 mm | 8 | 14 h 46 | 55 | Strong coverage |
| July | 32.5°C | 21°C | 119 mm | 6.7 | 14 h 32 | 46 | Strong coverage |
| August | 32.2°C | 20°C | 98 mm | 5.6 | 13 h 37 | 53 | Strong coverage |
| September | 27.4°C | 14.6°C | 108 mm | 5.2 | 12 h 23 | 76 | Strong coverage |
| October | 21.2°C | 8.1°C | 86 mm | 6.1 | 11 h 09 | 68 | Strong coverage |
| November | 13.9°C | 2.1°C | 70 mm | 5.2 | 10 h 05 | 37 | Strong coverage |
| December | 7.6°C | -3.2°C | 52 mm | 4.5 | 9 h 33 | 9 | 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 | 25.0°C24 Jan 1950 | -28.3°C12 Jan 1918 | 69 mm2 Jan 1897 | 167 mm1916 · driest 0 mm in 2015 | 124 |
| February | 28.9°C1 Feb 1911 | -31.1°C13 Feb 1905 | 86 mm14 Feb 2026 | 163 mm1911 · driest 0 mm in 2014 | 126 |
| March | 35.0°C21 Mar 1916 | -21.1°C12 Mar 1948 | 81 mm13 Mar 2021 | 302 mm1973 · driest 0 mm in 2016 | 126 |
| April | 36.1°C12 Apr 1972 | -8.9°C3 Apr 1936 | 182 mm28 Apr 2024 | 368 mm1994 · driest 7 mm in 1989 | 126 |
| May | 38.3°C31 May 1934 | -3.9°C4 May 1907 | 99 mm12 May 1955 | 361 mm1943 · driest 23 mm in 1941 | 126 |
| June | 41.7°C21 Jun 1918 | 5.0°C4 Jun 1946 | 161 mm25 Jun 1897 | 371 mm1977 · driest 6 mm in 1933 | 125 |
| July | 48.9°C14 Jul 1954 | 8.9°C3 Jul 1924 | 160 mm12 Jul 1924 | 326 mm1958 · driest 2 mm in 1970 | 124 |
| August | 45.0°C8 Aug 1946 | 5.6°C31 Aug 1915 | 145 mm5 Aug 2013 | 315 mm1927 · driest 0 mm in 2000 | 127 |
| September | 43.3°C7 Sep 1947 | -1.7°C30 Sep 1916 | 318 mm15 Sep 1998 | 400 mm1998 · driest 0 mm in 2017 | 125 |
| October | 37.2°C7 Oct 1963 | -8.3°C30 Oct 1917 | 218 mm3 Oct 1986 | 439 mm1986 · driest 2 mm in 1952 | 124 |
| November | 29.4°C1 Nov 1937 | -17.8°C17 Nov 1959 | 114 mm21 Nov 1979 | 223 mm2015 · driest 0 mm in 1965 | 125 |
| December | 26.1°C26 Dec 2025 | -27.8°C23 Dec 1989 | 77 mm15 Dec 1971 | 143 mm1982 · driest 0 mm in 2011 | 124 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 26 | 1 | 2 |
| February | <1 | 0 | 20 | 1 | <1 |
| March | 2 | <1 | 12 | 2 | <1 |
| April | 7 | <1 | 2 | 3 | <1 |
| May | 16 | 5 | 0 | 5 | 0 |
| June | 27 | 17 | 0 | 4 | 0 |
| July | 29 | 23 | 0 | 4 | 0 |
| August | 30 | 23 | 0 | 2 | 0 |
| September | 21 | 10 | 0 | 3 | 0 |
| October | 10 | 2 | 2 | 3 | 0 |
| November | <1 | 0 | 11 | 2 | <1 |
| December | 0 | 0 | 23 | 2 | <1 |
The best month has moved. On the 1961–1990 numbers the strongest month here was May (scoring 78); on 2011–2025 it is September (82). 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% | 15% | 4% | 11% | 2.0–9.6°C |
| February | 8% | 17% | 5% | 13% | 4.5–12.6°C |
| March | 24% | 21% | 8% | 20% | 10.9–18.2°C |
| April | 45% | 28% | 11% | 31% | 18.1–23.2°C |
| May | 61% | 32% | 15% | 40% | 23.1–27.6°C |
| June | 70% | 30% | 15% | 34% | 28.1–32.8°C |
| July | 78% | 22% | 10% | 20% | 30.9–36.1°C |
| August | 80% | 21% | 9% | 20% | 30.2–36.2°C |
| September | 75% | 22% | 11% | 21% | 26.1–31.4°C |
| October | 59% | 20% | 9% | 19% | 19.6–25.6°C |
| November | 21% | 17% | 7% | 14% | 11.1–17.2°C |
| December | 3% | 16% | 5% | 10% | 4.2–10.6°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