August
August · June · July
United States · 1991–2020
August leads for comfortable weather in Shullsburg: typically 26.9°C by day, 14.3°C at night, with 104 mm of rain. Based on measured 1991–2020 NOAA station history.
August · June · July
July · August · June
May · September · October
The weakest month is January, scoring 5 against August’s 76 — days reach only -2.6°C, 27° 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 | -2.6°C | -12.7°C | 30 mm | 5.2 | 9 h 22 | 5 | Good coverage |
| February | 0°C | -10.7°C | 37 mm | 5.5 | 10 h 29 | 5 | Good coverage |
| March | 6.8°C | -4.6°C | 51 mm | 5.8 | 11 h 48 | 5 | Good coverage |
| April | 13.9°C | 1.4°C | 101 mm | 8.4 | 13 h 19 | 28 | Good coverage |
| May | 21.1°C | 8.2°C | 105 mm | 10 | 14 h 35 | 62 | Good coverage |
| June | 26.1°C | 13.8°C | 143 mm | 9.1 | 15 h 17 | 70 | Good coverage |
| July | 28.1°C | 15.8°C | 111 mm | 7.5 | 15 h 01 | 70 | Good coverage |
| August | 26.9°C | 14.3°C | 104 mm | 6.6 | 13 h 54 | 76 | Good coverage |
| September | 23.1°C | 9.5°C | 125 mm | 7.9 | 12 h 26 | 70 | Good coverage |
| October | 15.8°C | 3.1°C | 76 mm | 6.4 | 10 h 58 | 43 | Good coverage |
| November | 7.4°C | -3.3°C | 58 mm | 5.4 | 9 h 42 | 7 | Good coverage |
| December | 0.9°C | -8.5°C | 36 mm | 5.3 | 9 h 04 | 5 | Good 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 | 15.0°C31 Jan 1989 | -40.6°C30 Jan 1951 | 36 mm4 Jan 1971 | 76 mm1960 · driest 0 mm in 1912 | 110 |
| February | 22.2°C28 Feb 2024 | -39.4°C1 Feb 2019 | 51 mm16 Feb 1911 | 126 mm1911 · driest 0 mm in 1958 | 111 |
| March | 28.9°C29 Mar 1986 | -36.1°C1 Mar 1962 | 59 mm30 Mar 1998 | 129 mm1998 · driest 0 mm in 1999 | 110 |
| April | 33.9°C22 Apr 1980 | -18.3°C7 Apr 1982 | 97 mm29 Apr 1991 | 239 mm1999 · driest 17 mm in 1985 | 110 |
| May | 40.0°C31 May 1934 | -6.7°C1 May 1918 | 105 mm16 May 1999 | 312 mm1933 · driest 8 mm in 1992 | 112 |
| June | 40.0°C1 Jun 1934 | -1.1°C10 Jun 1913 | 184 mm29 Jun 1990 | 403 mm1969 · driest 0 mm in 1939 | 111 |
| July | 41.7°C13 Jul 1936 | 3.9°C26 Jul 1911 | 135 mm18 Jul 1977 | 239 mm1962 · driest 10 mm in 1967 | 112 |
| August | 38.9°C16 Aug 1988 | -1.7°C30 Aug 1915 | 125 mm2 Aug 1942 | 324 mm1928 · driest 6 mm in 1901 | 110 |
| September | 37.8°C6 Sep 1922 | -6.1°C29 Sep 1949 | 162 mm9 Sep 1927 | 328 mm2019 · driest 4 mm in 1940 | 110 |
| October | 32.8°C1 Oct 1976 | -18.9°C30 Oct 1925 | 69 mm22 Oct 2001 | 222 mm2018 · driest 0 mm in 1952 | 109 |
| November | 26.1°C1 Nov 1933 | -28.9°C30 Nov 1947 | 64 mm2 Nov 1971 | 213 mm1934 · driest 0 mm in 1910 | 109 |
| December | 21.7°C16 Dec 2021 | -36.1°C27 Dec 1950 | 48 mm2 Dec 1982 | 111 mm2015 · driest 0 mm in 1937 | 110 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 29 | <1 | 5 |
| February | 0 | 0 | 26 | <1 | 4 |
| March | <1 | 0 | 25 | 2 | 2 |
| April | 1 | <1 | 12 | 3 | <1 |
| May | 9 | 2 | 1 | 4 | <1 |
| June | 19 | 6 | 0 | 4 | 0 |
| July | 25 | 10 | 0 | 3 | 0 |
| August | 23 | 6 | 0 | 3 | 0 |
| September | 12 | 3 | <1 | 4 | 0 |
| October | 2 | <1 | 10 | 3 | <1 |
| November | 0 | 0 | 22 | 2 | 1 |
| December | 0 | 0 | 28 | 1 | 4 |
The best month has moved. On the 1961–1990 numbers the strongest month here was June (scoring 78); on 2011–2025 it is September (81). 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% | 17% | 3% | 13% | -6.9–1.1°C |
| February | <1% | 17% | 3% | 13% | -4.0–4.3°C |
| March | 4% | 21% | 6% | 22% | 3.1–10.3°C |
| April | 18% | 28% | 10% | 32% | 11.9–17.2°C |
| May | 46% | 30% | 11% | 37% | 18.3–24.2°C |
| June | 66% | 30% | 13% | 37% | 23.8–28.3°C |
| July | 76% | 24% | 10% | 23% | 26.7–31.4°C |
| August | 76% | 23% | 11% | 21% | 25.5–29.5°C |
| September | 58% | 25% | 11% | 27% | 20.8–25.6°C |
| October | 28% | 21% | 7% | 21% | 13.9–19.9°C |
| November | 3% | 19% | 6% | 15% | 3.9–10.6°C |
| December | 0% | 18% | 4% | 15% | -3.5–4.1°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