Kewaunee, Wisconsin climate: Normal weather by month, frost dates and records
Kewaunee's normal year runs from 12°F January nights to 76°F July afternoons, with 31.1 inches of precipitation and 48 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 6.8°C, January lows of −11°C, July highs of 25°C, 789 mm of precipitation a year.
- NOAA stationKewaunee
- Station IDUSC00474195
- Location44.46°N 87.50°W
- Elevation593 ft (181 m)
- Population2,808
On October 23, the normal high in Kewaunee is 52°F and the normal low 38°F, and the chance of measurable rain or snow is 29%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Kewaunee.
- Jan 26° 12°
- Feb 29° 14°
- Mar 38° 23°
- Apr 48° 34°
- May 60° 44°
- Jun 70° 54°
- Jul 76° 60°
- Aug 75° 60°
- Sep 68° 52°
- Oct 55° 41°
- Nov 43° 30°
- Dec 32° 19°
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 Kewaunee each month?
July is the warmest month, with normal highs of 76°F; January the coldest, with normal lows of 12°F. The most precipitation falls in June (3.77 in), the least in February (1.05 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 26°F | 12°F | 19.3°F | 1.48 | 13.5 | 9 | <1 | 30 | 9 h 10 min |
| February | 29°F | 14°F | 21.3°F | 1.05 | 12.6 | 7 | <1 | 27 | 10 h 30 min |
| March | 38°F | 23°F | 30.4°F | 1.66 | 6.2 | 7 | <1 | 25 | 11 h 50 min |
| April | 48°F | 34°F | 41.3°F | 2.98 | 2.4 | 9 | <1 | 12 | 13 h 30 min |
| May | 60°F | 44°F | 52.0°F | 3.30 | 0.0 | 10 | <1 | 1 | 14 h 50 min |
| June | 70°F | 54°F | 62.3°F | 3.77 | 0.0 | 9 | <1 | <1 | 15 h 30 min |
| July | 76°F | 60°F | 68.2°F | 3.60 | 0.0 | 9 | 1 | <1 | 15 h 10 min |
| August | 75°F | 60°F | 67.6°F | 3.42 | 0.0 | 9 | 1 | <1 | 14 h 10 min |
| September | 68°F | 52°F | 60.1°F | 3.10 | 0.0 | 8 | <1 | <1 | 12 h 40 min |
| October | 55°F | 41°F | 48.2°F | 2.91 | 0.2 | 9 | <1 | 5 | 11 h |
| November | 43°F | 30°F | 36.2°F | 2.17 | 2.2 | 9 | <1 | 19 | 9 h 40 min |
| December | 32°F | 19°F | 25.4°F | 1.64 | 11.0 | 8 | <1 | 28 | 8 h 50 min |
| Year (annual) | 52°F | 37°F | 44.3°F | 31.08 | 48.1 | 102 | 2 | 145 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | −3°C | −11°C | −7.1°C | 38 mm | 34 cm |
| February | −2°C | −10°C | −5.9°C | 27 mm | 32 cm |
| March | 3°C | −5°C | −0.9°C | 42 mm | 16 cm |
| April | 9°C | 1°C | 5.2°C | 76 mm | 6 cm |
| May | 15°C | 7°C | 11.1°C | 84 mm | 0 cm |
| June | 21°C | 12°C | 16.8°C | 96 mm | 0 cm |
| July | 25°C | 16°C | 20.1°C | 91 mm | 0 cm |
| August | 24°C | 15°C | 19.8°C | 87 mm | 0 cm |
| September | 20°C | 11°C | 15.6°C | 79 mm | 0 cm |
| October | 13°C | 5°C | 9.0°C | 74 mm | 1 cm |
| November | 6°C | −1°C | 2.3°C | 55 mm | 6 cm |
| December | 0°C | −7°C | −3.7°C | 42 mm | 28 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00474195; 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 Kewaunee?
Normal highs sit between 65°F and 85°F in June, July, August and September. Of those, September has the fewest days with rain (8).
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 USC00474195.
When is the last frost in Kewaunee?
In Kewaunee, the last spring frost (32°F) comes after May 1 in half of years and after May 17 in one year in ten; the first autumn frost comes before October 18 in half of years and before October 2 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 11 year in 10 after May 17; 9 in 10 after April 16
- First autumn frost, half of years before
- October 181 year in 10 before October 2; 9 in 10 before November 1
NOAA puts the median frost-free season at 168 days, and the season without a hard freeze (28°F) at 195 days.
A hard freeze (28°F) comes after April 18 in half of springs and before October 31 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Kewaunee in zone 5b in ZIP code 54216, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Kewaunee's NOAA station is in zone 6a: the coldest night of a typical year reaches −9°F (21 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 USC00474195; 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 Kewaunee?
In a normal year in Kewaunee, 2 days a year reach 90°F, 145 nights fall to 32°F or colder and 102 days bring measurable precipitation.
- Days at 90°F or more
- 2a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 145a normal year
- Days that stay below freezing
- 62high of 32°F or less
- Days with 0.01 inch of precipitation
- 102a normal year
- Days with 1 inch of snow or more
- 17a normal year
The highest temperature in this station's record (since 1908) is 104°F, on July 30, 1916; the lowest is −29°F, on January 20, 1985.
The wettest calendar year on that record is 2019, with 41.31 in; the snowiest season is 2008–09, with 95.1 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00474195; records: ACIS (NOAA Regional Climate Centers), station USC00474195. Records use complete months only; a month missing more than three days is left out.
How sunny is Kewaunee?
Over a year 70% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Kewaunee, 3.6 kWh per square metre a day. July is the sunniest month (79%) and December the cloudiest (54%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 55% | 1.4 |
| February | 62% | 2.3 |
| March | 66% | 3.4 |
| April | 67% | 4.5 |
| May | 70% | 5.5 |
| June | 74% | 6.0 |
| July | 79% | 6.1 |
| August | 77% | 5.2 |
| September | 75% | 4.0 |
| October | 65% | 2.5 |
| November | 61% | 1.6 |
| December | 54% | 1.1 |
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 Kewaunee need?
A normal year in Kewaunee brings 7,816 heating degree days, 45% more than the median U.S. place (5,373), and 324 cooling degree days, 64% 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 2,010 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,418 | 0 |
| February | 1,224 | 0 |
| March | 1,071 | 0 |
| April | 711 | 0 |
| May | 409 | 4 |
| June | 129 | 48 |
| July | 31 | 132 |
| August | 32 | 111 |
| September | 176 | 29 |
| October | 523 | 1 |
| November | 866 | 0 |
| December | 1,228 | 0 |
| Year (annual) | 7,816 | 324 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00474195. 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 Kewaunee been warmer than normal lately?
2025 averaged 44.2°F, 0.1°F below the 1991-2020 normal of 44.3°F. 3 of the 5 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2021 | 46.0°F | +1.7°F | 30.16 | 25.1 |
| 2022 | 43.5°F | −0.8°F | 31.65 | 27.5 |
| 2023 | 46.5°F | +2.2°F | 26.90 | 33.6 |
| 2024 | 47.8°F | +3.5°F | 32.48 | 34.4 |
| 2025 | 44.2°F | −0.1°F | 27.69 | 47.3 |
Over 54 complete years from 1909 to 2025, the station's annual mean temperature rose at a fitted 2.6°F per century (+0.15°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00474195; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Kewaunee's climate compare?
Kewaunee is warmer than 60 of the other 164 places with their own NOAA record in Wisconsin, and wetter than 13. Across the 7,247 U.S. stations with normals, its annual mean of 44.3°F is warmer than 17%.
In the Köppen classification computed from these normals, Kewaunee 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 Kewaunee share this climate record?
3 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.
- Luxemburg, WI2,765 people · 11 mi NW
- Casco, WI683 people · 9 mi NW
- Dyckesville, WI300 people · 18 mi NW
Source: Census Bureau 2024 Gazetteer (place centers) and Vintage 2024 population estimates. Distance and direction from the station to each place's center.
Questions about Kewaunee's climate
What is the coldest month in Kewaunee?
January, with a normal high of 26°F and a normal low of 12°F. The warmest is July (76°F by day, 60°F at night).
Does it snow in Kewaunee?
Yes: 48 inches in a normal year, falling on 23 days with 0.1 inch or more, the most in January (13.5 inches).
What is the rainiest month in Kewaunee?
June, with 3.77 in of precipitation in a normal year; the driest is February with 1.05 in.
What plant hardiness zone is Kewaunee in?
The USDA's 2023 map puts Kewaunee in zone 5b in ZIP code 54216, the nearest ZIP area. By the same method at Kewaunee's NOAA station, the coldest night of a typical year reaches −9°F (21 years, 1991-2020): zone 6a.
How late can frost come in Kewaunee?
In half of years the last 32°F night comes after May 1; in one year in ten it comes after May 17. Waiting until May 17 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Wisconsin climateThe statewide normals and every place in the state
- Denmark, WI17 miles from this station, 44.7°F a year
- Forestville, WI17 miles from this station, 44.1°F a year
- Two Rivers, WI22 miles from this station, 44.3°F a year
- Manitowoc, WI27 miles from this station, 45.1°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made