August
August · June · July
United States · 1991–2020
August leads for comfortable weather in Belle Plaine: typically 26.2°C by day, 13.6°C at night, with 93 mm of rain. Based on measured 1991–2020 NOAA station history.
August · June · July
July · August · June
September · May · June
The weakest month is January, scoring 5 against August’s 78 — days reach only -4.4°C, 28° 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 | -4.4°C | -14.2°C | 33 mm | 6.4 | 9 h 09 | 5 | Strong coverage |
| February | -2°C | -13°C | 27 mm | 4.9 | 10 h 21 | 5 | Strong coverage |
| March | 4.6°C | -6.7°C | 46 mm | 6.8 | 11 h 46 | 5 | Strong coverage |
| April | 12.3°C | 0°C | 77 mm | 8.2 | 13 h 24 | 24 | Strong coverage |
| May | 19.6°C | 6.8°C | 96 mm | 10 | 14 h 47 | 56 | Strong coverage |
| June | 24.9°C | 12.5°C | 110 mm | 10.3 | 15 h 33 | 75 | Strong coverage |
| July | 27.3°C | 14.6°C | 99 mm | 9.1 | 15 h 15 | 74 | Strong coverage |
| August | 26.2°C | 13.6°C | 93 mm | 8.1 | 14 h 03 | 78 | Strong coverage |
| September | 21.9°C | 8.9°C | 92 mm | 8 | 12 h 28 | 70 | Strong coverage |
| October | 14.1°C | 2.4°C | 77 mm | 7.5 | 10 h 53 | 35 | Strong coverage |
| November | 5.7°C | -3.8°C | 52 mm | 6 | 9 h 30 | 5 | Strong coverage |
| December | -1.4°C | -10.1°C | 40 mm | 7 | 8 h 49 | 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 | 11.7°C26 Jan 1944 | -37.2°C27 Jan 1935 | 46 mm9 Jan 2026 | 103 mm1929 · driest 3 mm in 1981 | 109 |
| February | 21.7°C28 Feb 2024 | -39.4°C11 Feb 1899 | 45 mm21 Feb 1937 | 82 mm1937 · driest 2 mm in 1969 | 108 |
| March | 27.8°C18 Mar 2012 | -33.3°C1 Mar 1962 | 49 mm7 Mar 1973 | 120 mm2025 · driest 2 mm in 1978 | 110 |
| April | 33.9°C22 Apr 1980 | -16.7°C3 Apr 1899 | 70 mm25 Apr 1994 | 224 mm2026 · driest 9 mm in 1946 | 109 |
| May | 35.0°C2 May 1959 | -7.2°C1 May 1956 | 94 mm30 May 1942 | 233 mm1973 · driest 10 mm in 1947 | 110 |
| June | 38.3°C2 Jun 1934 | -2.2°C1 Jun 1897 | 78 mm15 Jun 2017 | 242 mm1968 · driest 23 mm in 1988 | 110 |
| July | 42.8°C12 Jul 1936 | 0.6°C4 Jul 1972 | 89 mm8 Jul 1925 | 247 mm2010 · driest 11 mm in 1937 | 109 |
| August | 40.0°C21 Aug 1955 | 0.0°C29 Aug 1934 | 86 mm21 Aug 1926 | 269 mm1995 · driest 8 mm in 1969 | 108 |
| September | 37.8°C9 Sep 1933 | -6.7°C23 Sep 1974 | 108 mm11 Sep 1900 | 245 mm1965 · driest 11 mm in 1976 | 109 |
| October | 31.1°C1 Oct 1976 | -14.4°C30 Oct 1925 | 97 mm3 Oct 1900 | 255 mm1900 · driest 1 mm in 1952 | 110 |
| November | 23.9°C2 Nov 1933 | -25.6°C30 Nov 1929 | 63 mm21 Nov 1992 | 154 mm1934 · driest 0 mm in 1976 | 108 |
| December | 16.7°C6 Dec 2001 | -32.2°C11 Dec 1977 | 49 mm14 Dec 2015 | 126 mm2015 · driest 0 mm in 1943 | 109 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 30 | <1 | 8 |
| February | 0 | 0 | 28 | <1 | 5 |
| March | <1 | 0 | 27 | 1 | 4 |
| April | 1 | <1 | 16 | 3 | 2 |
| May | 6 | 2 | 3 | 3 | 0 |
| June | 16 | 5 | 0 | 4 | 0 |
| July | 24 | 8 | 0 | 3 | 0 |
| August | 21 | 5 | 0 | 3 | 0 |
| September | 10 | 1 | <1 | 3 | 0 |
| October | 2 | <1 | 12 | 3 | <1 |
| November | 0 | 0 | 24 | 2 | 2 |
| December | 0 | 0 | 30 | 1 | 6 |
The best month has moved. On the 1961–1990 numbers the strongest month here was June (scoring 80); on 2011–2025 it is August (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 | 0% | 20% | 3% | 17% | -6.9–-0.8°C |
| February | 0% | 19% | 3% | 13% | -5.5–1.6°C |
| March | 1% | 21% | 5% | 21% | 1.3–7.8°C |
| April | 13% | 26% | 9% | 29% | 9.8–16.0°C |
| May | 40% | 29% | 10% | 33% | 17.5–23.7°C |
| June | 63% | 31% | 12% | 41% | 23.5–27.8°C |
| July | 73% | 27% | 10% | 29% | 26.2–30.3°C |
| August | 73% | 25% | 10% | 26% | 24.8–28.6°C |
| September | 51% | 26% | 10% | 29% | 19.9–24.5°C |
| October | 20% | 22% | 7% | 20% | 11.8–18.4°C |
| November | 1% | 21% | 6% | 18% | 2.4–9.2°C |
| December | 0% | 21% | 3% | 19% | -4.4–1.7°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