September
September · June · August
United States · 1991–2020
September leads for comfortable weather in Sheboygan: typically 22.4°C by day, 12.2°C at night, with 64 mm of rain. Based on measured 1991–2020 NOAA station history.
September · June · August
July · August · September
September · May · October
The weakest month is January, scoring 5 against September’s 81 — days reach only -0.6°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 | Sea | Daylight | Comfort | Coverage |
|---|---|---|---|---|---|---|---|---|
| January | -0.6°C | -9.6°C | 51 mm | 8.7 | 3.2°C | 9 h 15 | 5 | Good coverage |
| February | 0.9°C | -7.8°C | 44 mm | 6.2 | 2.3°C | 10 h 25 | 5 | Good coverage |
| March | 5.6°C | -3.5°C | 49 mm | 7.7 | 2.2°C | 11 h 47 | 5 | Good coverage |
| April | 11.8°C | 1.9°C | 84 mm | 9.4 | 3.1°C | 13 h 22 | 23 | Good coverage |
| May | 17.5°C | 7.1°C | 90 mm | 10.2 | 5.2°C | 14 h 42 | 50 | Good coverage |
| June | 23.8°C | 12.9°C | 103 mm | 9.6 | 11.1°C | 15 h 26 | 80 | Good coverage |
| July | 27.4°C | 16.4°C | 86 mm | 8.3 | 18.4°C | 15 h 08 | 74 | Good coverage |
| August | 26.6°C | 16.5°C | 93 mm | 7.8 | 20.6°C | 13 h 59 | 76 | Good coverage |
| September | 22.4°C | 12.2°C | 64 mm | 8.1 | 18.5°C | 12 h 27 | 81 | Good coverage |
| October | 15.6°C | 5.5°C | 67 mm | 7.5 | 12.6°C | 10 h 56 | 47 | Good coverage |
| November | 7.9°C | -0.6°C | 63 mm | 7.1 | 7.5°C | 9 h 36 | 11 | Good coverage |
| December | 2°C | -6.4°C | 43 mm | 7.1 | 4.8°C | 8 h 56 | 5 | Good coverage |
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 16.7°C26 Jan 1944 | -32.2°C17 Jan 1982 | 42 mm31 Jan 1947 | 97 mm1916 · driest 1 mm in 1981 | 105 |
| February | 17.2°C23 Feb 1984 | -31.7°C2 Feb 1996 | 68 mm21 Feb 1937 | 176 mm2008 · driest 0 mm in 1947 | 108 |
| March | 27.8°C26 Mar 2007 | -24.4°C1 Mar 1962 | 66 mm31 Mar 1998 | 159 mm1976 · driest 3 mm in 1910 | 108 |
| April | 33.3°C22 Apr 1980 | -12.2°C1 Apr 1923 | 54 mm11 Apr 2001 | 191 mm1929 · driest 9 mm in 1946 | 109 |
| May | 34.4°C30 May 1939 | -5.0°C1 May 1914 | 107 mm30 May 1989 | 278 mm2004 · driest 14 mm in 1981 | 108 |
| June | 38.9°C21 Jun 1933 | 1.1°C4 Jun 1945 | 123 mm14 Jun 1926 | 278 mm2008 · driest 9 mm in 1964 | 108 |
| July | 42.2°C14 Jul 1995 | 6.1°C4 Jul 1927 | 112 mm31 Jul 2003 | 204 mm1952 · driest 8 mm in 1939 | 109 |
| August | 41.7°C25 Aug 1948 | 2.8°C30 Aug 1915 | 275 mm6 Aug 1998 | 338 mm1998 · driest 4 mm in 1969 | 109 |
| September | 38.3°C14 Sep 1939 | -2.2°C24 Sep 1950 | 132 mm11 Sep 1986 | 335 mm1986 · driest 3 mm in 1979 | 108 |
| October | 32.2°C6 Oct 1963 | -10.0°C30 Oct 1925 | 69 mm3 Oct 1900 | 193 mm1951 · driest 1 mm in 1924 | 107 |
| November | 26.1°C2 Nov 1950 | -20.6°C29 Nov 1976 | 93 mm4 Nov 2003 | 174 mm1934 · driest 4 mm in 1904 | 108 |
| December | 18.3°C3 Dec 1998 | -29.4°C24 Dec 1983 | 68 mm27 Dec 1942 | 129 mm1971 · driest 3 mm in 1960 | 108 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 28 | 2 | 7 |
| February | 0 | 0 | 25 | 1 | 5 |
| March | <1 | 0 | 23 | 2 | 3 |
| April | 1 | <1 | 8 | 3 | 1 |
| May | 3 | <1 | <1 | 3 | 0 |
| June | 12 | 4 | 0 | 3 | 0 |
| July | 21 | 8 | 0 | 3 | 0 |
| August | 20 | 6 | 0 | 3 | 0 |
| September | 9 | 2 | 0 | 2 | 0 |
| October | 2 | <1 | 3 | 2 | 0 |
| November | 0 | 0 | 16 | 2 | 2 |
| December | 0 | 0 | 25 | 1 | 5 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 0% | 22% | 4% | 19% | -5.7–1.6°C |
| February | 0% | 20% | 4% | 16% | -4.2–3.1°C |
| March | 1% | 22% | 6% | 22% | 1.8–7.8°C |
| April | 7% | 27% | 8% | 32% | 8.5–13.8°C |
| May | 25% | 28% | 9% | 32% | 14.8–19.9°C |
| June | 55% | 29% | 9% | 32% | 21.1–25.8°C |
| July | 74% | 24% | 8% | 23% | 25.0–29.1°C |
| August | 74% | 24% | 9% | 22% | 24.0–28.3°C |
| September | 53% | 26% | 10% | 28% | 20.2–24.0°C |
| October | 16% | 23% | 7% | 24% | 13.1–17.7°C |
| November | 1% | 22% | 6% | 20% | 4.8–10.0°C |
| December | 0% | 21% | 5% | 20% | -3.2–3.9°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