April
April · October · March
United States · 1991–2020
April leads for comfortable weather in Onalaska: typically 25.9°C by day, 12.5°C at night, with 104 mm of rain. Based on measured 1991–2020 NOAA station history.
April · October · March
May · September · July
March · November · February
The weakest month is January, scoring 39 against April’s 77 — days reach only 16.3°C, 8° below the 24°C the score treats as ideal, and nights drop to 3.1°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 | 16.3°C | 3.1°C | 116 mm | 6.2 | 10 h 21 | 39 | Strong coverage |
| February | 18.6°C | 5.3°C | 98 mm | 6.8 | 11 h 03 | 53 | Good coverage |
| March | 21.9°C | 8.8°C | 101 mm | 5.9 | 11 h 54 | 70 | Strong coverage |
| April | 25.9°C | 12.5°C | 104 mm | 5.5 | 12 h 53 | 77 | Strong coverage |
| May | 29.6°C | 17.6°C | 110 mm | 6 | 13 h 42 | 64 | Strong coverage |
| June | 33°C | 21.3°C | 130 mm | 6.8 | 14 h 08 | 42 | Good coverage |
| July | 34.6°C | 22.7°C | 84 mm | 5.4 | 13 h 58 | 42 | Strong coverage |
| August | 35.1°C | 22.2°C | 91 mm | 6.2 | 13 h 16 | 40 | Good coverage |
| September | 32°C | 18.6°C | 110 mm | 5.7 | 12 h 19 | 54 | Good coverage |
| October | 27°C | 13.2°C | 121 mm | 5.7 | 11 h 22 | 72 | Strong coverage |
| November | 21.4°C | 8°C | 123 mm | 5.9 | 10 h 33 | 64 | Good coverage |
| December | 17.1°C | 4.1°C | 113 mm | 6.9 | 10 h 10 | 43 | Good coverage |
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 30.0°C18 Jan 1952 | -15.0°C12 Jan 1962 | 109 mm9 Jan 2012 | 332 mm1974 · driest 12 mm in 2016 | 80 |
| February | 35.0°C16 Feb 2015 | -15.6°C2 Feb 1951 | 108 mm5 Feb 1945 | 197 mm2004 · driest 4 mm in 2007 | 80 |
| March | 35.0°C30 Mar 1946 | -7.8°C4 Mar 2002 | 187 mm29 Mar 2018 | 290 mm1990 · driest 11 mm in 1955 | 79 |
| April | 35.0°C2 Apr 1950 | -2.2°C4 Apr 1987 | 167 mm29 Apr 1953 | 261 mm1991 · driest 2 mm in 1965 | 79 |
| May | 37.8°C30 May 1996 | 3.3°C1 May 1965 | 151 mm21 May 1983 | 344 mm1983 · driest 6 mm in 1998 | 81 |
| June | 40.0°C25 Jun 2009 | 8.3°C1 Jun 1984 | 161 mm7 Jun 1981 | 409 mm1981 · driest 2 mm in 1948 | 79 |
| July | 43.9°C18 Jul 1980 | 10.6°C16 Jul 1967 | 163 mm30 Jul 1954 | 251 mm1979 · driest 6 mm in 1993 | 79 |
| August | 43.9°C6 Aug 1951 | 12.2°C29 Aug 1970 | 249 mm10 Aug 1957 | 283 mm1983 · driest 3 mm in 2012 | 79 |
| September | 43.9°C5 Sep 2000 | 2.2°C30 Sep 1967 | 213 mm15 Sep 2008 | 323 mm1958 · driest 12 mm in 1995 | 78 |
| October | 37.8°C1 Oct 1953 | -3.9°C31 Oct 1993 | 266 mm17 Oct 1994 | 515 mm2006 · driest 0 mm in 1952 | 80 |
| November | 32.8°C1 Nov 1947 | -8.3°C29 Nov 1976 | 259 mm24 Nov 1940 | 514 mm1940 · driest 13 mm in 1949 | 78 |
| December | 31.1°C31 Dec 1964 | -16.1°C23 Dec 1989 | 139 mm18 Dec 1995 | 265 mm1965 · driest 7 mm in 2015 | 78 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) |
|---|---|---|---|---|
| January | 2 | 0 | 11 | 3 |
| February | 4 | <1 | 6 | 3 |
| March | 10 | <1 | 2 | 3 |
| April | 19 | 3 | <1 | 3 |
| May | 27 | 16 | 0 | 3 |
| June | 28 | 25 | 0 | 3 |
| July | 29 | 28 | 0 | 2 |
| August | 29 | 28 | 0 | 3 |
| September | 28 | 23 | 0 | 3 |
| October | 21 | 9 | <1 | 3 |
| November | 9 | <1 | 4 | 3 |
| December | 2 | 0 | 10 | 3 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 25% | 25% | 11% | 27% | 12.3–18.7°C |
| February | 36% | 25% | 11% | 25% | 14.9–21.4°C |
| March | 57% | 21% | 9% | 18% | 19.4–24.3°C |
| April | 76% | 19% | 9% | 19% | 23.9–27.6°C |
| May | 79% | 21% | 12% | 21% | 28.2–30.8°C |
| June | 78% | 22% | 11% | 23% | 31.1–34.4°C |
| July | 79% | 21% | 9% | 21% | 32.8–36.0°C |
| August | 80% | 21% | 9% | 21% | 33.0–36.6°C |
| September | 79% | 21% | 9% | 20% | 30.0–33.6°C |
| October | 80% | 16% | 8% | 15% | 25.1–29.2°C |
| November | 52% | 22% | 11% | 21% | 18.9–23.6°C |
| December | 28% | 24% | 11% | 27% | 14.9–19.5°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