Sheboygan, Wisconsin climate: Normal weather by month, frost dates and records
Sheboygan's normal year runs from 12°F January nights to 80°F July afternoons, with 29.4 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 7.3°C, January lows of −11°C, July highs of 27°C, 747 mm of precipitation a year.
- NOAA stationSheboygan County Mem Airport
- Station IDUSW00004841
- Location43.77°N 87.85°W
- Elevation746 ft (227 m)
- Population49,624
On October 22, the normal high in Sheboygan is 55°F and the normal low 37°F, and the chance of measurable rain or snow is 35%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Sheboygan.
- Jan 27° 12°
- Feb 30° 14°
- Mar 41° 24°
- Apr 53° 34°
- May 65° 44°
- Jun 75° 54°
- Jul 80° 58°
- Aug 78° 57°
- Sep 71° 50°
- Oct 58° 39°
- Nov 44° 28°
- Dec 33° 18°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like in Sheboygan each month?
July is the warmest month, with normal highs of 80°F; January the coldest, with normal lows of 12°F. The most precipitation falls in June (3.77 in), the least in February (0.96 in).
Each month has its own page with the day-by-day normals, the month's records and its recent years:
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 27°F | 12°F | 19.4°F | 1.10 | 7 | <1 | 30 | 9 h 20 min |
| February | 30°F | 14°F | 22.1°F | 0.96 | 8 | <1 | 27 | 10 h 30 min |
| March | 41°F | 24°F | 32.1°F | 1.65 | 10 | <1 | 25 | 11 h 50 min |
| April | 53°F | 34°F | 43.0°F | 3.30 | 12 | <1 | 13 | 13 h 20 min |
| May | 65°F | 44°F | 54.2°F | 3.35 | 13 | <1 | 2 | 14 h 40 min |
| June | 75°F | 54°F | 64.5°F | 3.77 | 12 | 1 | <1 | 15 h 30 min |
| July | 80°F | 58°F | 69.3°F | 3.42 | 12 | 3 | <1 | 15 h 10 min |
| August | 78°F | 57°F | 67.7°F | 3.06 | 12 | 1 | <1 | 14 h |
| September | 71°F | 50°F | 60.4°F | 2.70 | 11 | <1 | <1 | 12 h 30 min |
| October | 58°F | 39°F | 48.5°F | 2.76 | 12 | <1 | 8 | 11 h 10 min |
| November | 44°F | 28°F | 36.3°F | 1.96 | 9 | <1 | 20 | 9 h 40 min |
| December | 33°F | 18°F | 25.5°F | 1.38 | 8 | <1 | 28 | 9 h |
| Year (annual) | 55°F | 36°F | 45.2°F | 29.41 | 125 | 6 | 151 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | −3°C | −11°C | −7.0°C | 28 mm |
| February | −1°C | −10°C | −5.5°C | 24 mm |
| March | 5°C | −5°C | 0.1°C | 42 mm |
| April | 11°C | 1°C | 6.1°C | 84 mm |
| May | 18°C | 6°C | 12.3°C | 85 mm |
| June | 24°C | 12°C | 18.1°C | 96 mm |
| July | 27°C | 15°C | 20.7°C | 87 mm |
| August | 26°C | 14°C | 19.8°C | 78 mm |
| September | 22°C | 10°C | 15.8°C | 69 mm |
| October | 15°C | 4°C | 9.2°C | 70 mm |
| November | 7°C | −2°C | 2.4°C | 50 mm |
| December | 0°C | −8°C | −3.6°C | 35 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Plymouth (7 miles away), gets 45 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USW00004841; annual normals. Wet days: 0.01 inch or more; 90°F days and freezing nights: NOAA's day counts. Daylight: sunrise to sunset on the 15th, computed from the latitude.
When is the best weather to visit Sheboygan?
Normal highs sit between 65°F and 85°F in June, July, August and September. Of those, September has the fewest days with rain (11).
That is a measurement, not a recommendation: it counts the months whose normal afternoon high sits between 65°F and 85°F, where a light layer is enough by day.
Source: NOAA NCEI 1991-2020 monthly normals, station USW00004841.
When is the last frost in Sheboygan?
In Sheboygan, the last spring frost (32°F) comes after May 5 in half of years and after May 21 in one year in ten; the first autumn frost comes before October 8 in half of years and before September 26 in one year in ten.
Frost-free in half of yearsFrost in 1 to 9 years out of 10Frost most years
- Last spring frost, half of years after
- May 51 year in 10 after May 21; 9 in 10 after April 22
- First autumn frost, half of years before
- October 81 year in 10 before September 26; 9 in 10 before October 23
NOAA puts the median frost-free season at 154 days, and the season without a hard freeze (28°F) at 180 days.
A hard freeze (28°F) comes after April 23 in half of springs and before October 21 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Sheboygan in zone 6a in ZIP code 53081. By the map's own method, the average of each year's coldest night over 1991-2020, Sheboygan's NOAA station is in zone 5b: the coldest night of a typical year reaches −12°F (23 complete years); the map interpolates between stations and terrain, so the station and the ZIP area can differ by half a zone.
Frost dates for every NOAA station in Wisconsin · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USW00004841; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026; the station zone: ACIS daily lows, 1991-2020. A 10% date means one year in ten has a frost after it in spring or before it in autumn.
How hot and how cold does it get in Sheboygan?
In a normal year in Sheboygan, 6 days a year reach 90°F, 151 nights fall to 32°F or colder and 125 days bring measurable precipitation.
- Days at 90°F or more
- 6a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 151a normal year
- Days that stay below freezing
- 62high of 32°F or less
- Days with 0.01 inch of precipitation
- 125a normal year
The highest temperature in this station's record (since 1996) is 102°F, on July 5, 2012; the lowest is −23°F, on January 31, 2019.
The wettest calendar year on that record is 2008, with 35.39 in.
Source: NOAA NCEI 1991-2020 annual normals, station USW00004841; records: ACIS (NOAA Regional Climate Centers), station USW00004841. Records use complete months only; a month missing more than three days is left out.
How sunny is Sheboygan?
Over a year 70% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Sheboygan, 3.7 kWh per square metre a day. July is the sunniest month (80%) and December the cloudiest (53%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 54% | 1.4 |
| February | 60% | 2.3 |
| March | 66% | 3.5 |
| April | 68% | 4.6 |
| May | 70% | 5.4 |
| June | 75% | 6.0 |
| July | 80% | 6.1 |
| August | 79% | 5.2 |
| September | 77% | 4.2 |
| October | 67% | 2.6 |
| November | 62% | 1.7 |
| December | 53% | 1.2 |
Source: NASA POWER solar climatology, 2001-2020 (CERES SYN1deg). Satellite-based, for the 1-degree cell (about 100 km across) around the station, so it describes the area rather than the airport.
How much heating and cooling does Sheboygan need?
A normal year in Sheboygan brings 7,571 heating degree days, 41% more than the median U.S. place (5,373), and 407 cooling degree days, 55% fewer than the median (908). Eight months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 2,210 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,415 | 0 |
| February | 1,201 | 0 |
| March | 1,019 | 0 |
| April | 659 | 0 |
| May | 348 | 13 |
| June | 93 | 78 |
| July | 26 | 157 |
| August | 34 | 118 |
| September | 175 | 37 |
| October | 514 | 3 |
| November | 861 | 0 |
| December | 1,226 | 0 |
| Year (annual) | 7,571 | 407 |
Source: NOAA NCEI 1991-2020 monthly normals, station USW00004841. A degree day is one degree of a day's mean temperature below 65°F (heating) or above it (cooling); utilities use them to estimate energy use.
Has Sheboygan been warmer than normal lately?
2025 averaged 46.0°F, 0.8°F above the 1991-2020 normal of 45.2°F. 5 of the 5 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 48.2°F | +3.0°F | 27.77 |
| 2022 | 46.1°F | +0.9°F | 27.32 |
| 2023 | 48.9°F | +3.7°F | 27.95 |
| 2024 | 48.9°F | +3.7°F | 33.87 |
| 2025 | 46.0°F | +0.8°F | 25.06 |
Source: observed years: ACIS, station USW00004841. A year counts only with all twelve months complete.
How does Sheboygan's climate compare?
Sheboygan is warmer than 87 of the other 164 places with their own NOAA record in Wisconsin, and wetter than 4. Across the 7,247 U.S. stations with normals, its annual mean of 45.2°F is warmer than 20%.
In the Köppen classification computed from these normals, Sheboygan is Dfb: continental, no dry season, warm summer. What the classes mean.
Places with the most similar year elsewhere
Measured month by month on the normal high, low and precipitation, among places of 20,000 or more people in other states:
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers. Similarity: the root-mean-square difference of the 36 monthly figures, precipitation weighted so an inch counts like 6°F.
Which places near Sheboygan share this climate record?
4 places have no NOAA station with 1991-2020 normals of their own, and this station is the nearest full record. A place's own climate can differ from these figures, by several degrees where it sits much higher or lower than the station, nearer the coast, or inside a large city's heat; for the larger places the next nearest records are named with their yearly mean, so the spread around them is visible, and places of 50,000 or more have their own page with NOAA's gridded normals.
- Sheboygan Falls, WI8,656 people · 3 mi SE
- Howards Grove, WI3,208 people · 4 mi N
- Kohler, WI2,274 people · 4 mi SE
- Cleveland, WI1,581 people · 11 mi NE
Source: Census Bureau 2024 Gazetteer (place centers) and Vintage 2024 population estimates. Distance and direction from the station to each place's center.
What do Sheboygan's other NOAA stations record?
2 more NOAA stations keep 1991-2020 normals in or near Sheboygan. This page uses Sheboygan County Mem Airport; the others differ by site and elevation:
| Station | From this station | Elevation | Year | Jan low | Jul high | Precip. | Snow | Last frost |
|---|---|---|---|---|---|---|---|---|
| Sheboygan Wastewater Treatment Plant USC00471605 | 8 mi SE | 603 ft | 45.0°F | 13°F | 77°F | 34.3 | – | May 2 |
| Sheboygan station USC00477725 | 7 mi E | 648 ft | 47.6°F | 15°F | 82°F | 34.7 | – | April 25 |
Source: NOAA NCEI 1991-2020 normals for each station. Last frost: the median last spring date of 32°F.
Questions about Sheboygan's climate
What is the coldest month in Sheboygan?
January, with a normal high of 27°F and a normal low of 12°F. The warmest is July (80°F by day, 58°F at night).
Does it snow in Sheboygan?
Yes. NOAA publishes no 1991-2020 snowfall normal for Sheboygan's NOAA station; the nearest record that keeps one, Plymouth (7 miles away), records 45 inches of snow in a normal year.
What is the rainiest month in Sheboygan?
June, with 3.77 in of precipitation in a normal year; the driest is February with 0.96 in.
What plant hardiness zone is Sheboygan in?
The USDA's 2023 map puts Sheboygan in zone 6a in ZIP code 53081. By the same method at Sheboygan's NOAA station, the coldest night of a typical year reaches −12°F (23 years, 1991-2020): zone 5b.
How late can frost come in Sheboygan?
In half of years the last 32°F night comes after May 5; in one year in ten it comes after May 21. Waiting until May 21 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Sheboygan in OctoberThis month day by day, its records and recent years
- Wisconsin climateThe statewide normals and every place in the state
- Plymouth, WI7 miles from this station, 45.7°F a year
- Hingham, WI9 miles from this station, 45.9°F a year
- Belgium, WI17 miles from this station, 45.1°F a year
- Chilton, WI24 miles from this station, 45.7°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made