Denmark, Wisconsin climate: Normal weather by month, frost dates and records
Denmark's normal year runs from 10°F January nights to 80°F July afternoons, with 30.1 inches of precipitation and 53 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 7.1°C, January lows of −12°C, July highs of 27°C, 764 mm of precipitation a year.
- NOAA stationDenmark Wastewater Treatment Plant
- Station IDUSC00472055
- Location44.35°N 87.81°W
- Elevation811 ft (247 m)
- From the centerunder 1 mile
- Population2,892
On October 14, the normal high in Denmark is 58°F and the normal low 40°F, and the chance of measurable rain or snow is 39%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Denmark.
- Jan 25° 10°
- Feb 28° 12°
- Mar 39° 22°
- Apr 52° 33°
- May 66° 44°
- Jun 75° 54°
- Jul 80° 59°
- Aug 78° 58°
- Sep 71° 51°
- Oct 57° 39°
- Nov 43° 28°
- Dec 31° 17°
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 Denmark each month?
July is the warmest month, with normal highs of 80°F; January the coldest, with normal lows of 10°F. The most precipitation falls in June (3.89 in), the least in February (0.99 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 25°F | 10°F | 17.5°F | 1.33 | 12.1 | 10 | <1 | 30 | 9 h 10 min |
| February | 28°F | 12°F | 20.2°F | 0.99 | 12.3 | 9 | <1 | 28 | 10 h 30 min |
| March | 39°F | 22°F | 30.5°F | 1.54 | 6.5 | 8 | <1 | 26 | 11 h 50 min |
| April | 52°F | 33°F | 42.6°F | 2.97 | 4.3 | 11 | <1 | 15 | 13 h 20 min |
| May | 66°F | 44°F | 55.0°F | 3.21 | 0.0 | 11 | <1 | 2 | 14 h 40 min |
| June | 75°F | 54°F | 64.7°F | 3.89 | 0.0 | 12 | 1 | <1 | 15 h 30 min |
| July | 80°F | 59°F | 69.5°F | 3.24 | 0.0 | 11 | 2 | <1 | 15 h 10 min |
| August | 78°F | 58°F | 68.0°F | 3.49 | 0.0 | 10 | 1 | <1 | 14 h 10 min |
| September | 71°F | 51°F | 60.8°F | 3.04 | 0.0 | 11 | 1 | <1 | 12 h 40 min |
| October | 57°F | 39°F | 48.2°F | 2.68 | 0.5 | 12 | <1 | 7 | 11 h |
| November | 43°F | 28°F | 35.3°F | 2.06 | 1.5 | 9 | <1 | 20 | 9 h 40 min |
| December | 31°F | 17°F | 23.8°F | 1.63 | 15.3 | 11 | <1 | 29 | 8 h 50 min |
| Year (annual) | 54°F | 36°F | 44.7°F | 30.07 | 52.5 | 125 | 4 | 156 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | −4°C | −12°C | −8.1°C | 34 mm | 31 cm |
| February | −2°C | −11°C | −6.6°C | 25 mm | 31 cm |
| March | 4°C | −6°C | −0.8°C | 39 mm | 17 cm |
| April | 11°C | 0°C | 5.9°C | 75 mm | 11 cm |
| May | 19°C | 7°C | 12.8°C | 82 mm | 0 cm |
| June | 24°C | 12°C | 18.2°C | 99 mm | 0 cm |
| July | 27°C | 15°C | 20.8°C | 82 mm | 0 cm |
| August | 26°C | 14°C | 20.0°C | 89 mm | 0 cm |
| September | 22°C | 10°C | 16.0°C | 77 mm | 0 cm |
| October | 14°C | 4°C | 9.0°C | 68 mm | 1 cm |
| November | 6°C | −2°C | 1.8°C | 52 mm | 4 cm |
| December | −1°C | −8°C | −4.6°C | 41 mm | 39 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00472055; 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 Denmark?
Normal highs sit between 65°F and 85°F in May, June, July, August and September. Of those, August has the fewest days with rain (10).
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 USC00472055.
When is the last frost in Denmark?
In Denmark, the last spring frost (32°F) comes after May 6 in half of years and after May 20 in one year in ten; the first autumn frost comes before October 12 in half of years and before September 30 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 61 year in 10 after May 20; 9 in 10 after April 22
- First autumn frost, half of years before
- October 121 year in 10 before September 30; 9 in 10 before October 27
NOAA puts the median frost-free season at 158 days, and the season without a hard freeze (28°F) at 183 days.
A hard freeze (28°F) comes after April 23 in half of springs and before October 26 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Denmark in zone 5b in ZIP code 54208, the nearest ZIP area.
Frost dates for every NOAA station in Wisconsin · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00472055; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026. 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 Denmark?
In a normal year in Denmark, 4 days a year reach 90°F, 156 nights fall to 32°F or colder and 125 days bring measurable precipitation.
- Days at 90°F or more
- 4a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 156a normal year
- Days that stay below freezing
- 72high of 32°F or less
- Days with 0.01 inch of precipitation
- 125a normal year
- Days with 1 inch of snow or more
- 17a normal year
Source: NOAA NCEI 1991-2020 annual normals, station USC00472055.
How sunny is Denmark?
Over a year 70% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Denmark, 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 Denmark need?
A normal year in Denmark brings 7,789 heating degree days, 45% more than the median U.S. place (5,373), and 417 cooling degree days, 54% 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 2,259 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,472 | 0 |
| February | 1,254 | 0 |
| March | 1,070 | 0 |
| April | 672 | 0 |
| May | 323 | 15 |
| June | 82 | 73 |
| July | 21 | 158 |
| August | 32 | 125 |
| September | 172 | 44 |
| October | 523 | 2 |
| November | 891 | 0 |
| December | 1,277 | 0 |
| Year (annual) | 7,789 | 417 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00472055. 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 Denmark been warmer than normal lately?
2025 averaged 45.2°F, 0.5°F above the 1991-2020 normal of 44.7°F. 4 of the 5 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2021 | 46.8°F | +2.1°F | 29.52 | 31.9 |
| 2022 | 44.2°F | −0.5°F | 30.88 | 40.4 |
| 2023 | 47.1°F | +2.4°F | 26.45 | 57.9 |
| 2024 | 48.3°F | +3.6°F | 37.81 | 50.3 |
| 2025 | 45.2°F | +0.5°F | 28.35 | 47.9 |
Source: observed years: ACIS, station USC00472055. A year counts only with all twelve months complete.
How does Denmark's climate compare?
Denmark is warmer than 68 of the other 164 places with their own NOAA record in Wisconsin, and wetter than 6. Across the 7,247 U.S. stations with normals, its annual mean of 44.7°F is warmer than 18%.
In the Köppen classification computed from these normals, Denmark 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 Denmark share this climate record?
2 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.
- Maribel, WI339 people · 5 mi S
- Kellnersville, WI312 people · 9 mi S
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 Denmark's climate
What is the coldest month in Denmark?
January, with a normal high of 25°F and a normal low of 10°F. The warmest is July (80°F by day, 59°F at night).
Does it snow in Denmark?
Yes: 53 inches in a normal year, falling on 30 days with 0.1 inch or more, the most in December (15.3 inches).
What is the rainiest month in Denmark?
June, with 3.89 in of precipitation in a normal year; the driest is February with 0.99 in.
What plant hardiness zone is Denmark in?
The USDA's 2023 map puts Denmark in zone 5b in ZIP code 54208, the nearest ZIP area.
How late can frost come in Denmark?
In half of years the last 32°F night comes after May 6; in one year in ten it comes after May 20. Waiting until May 20 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Wisconsin climateThe statewide normals and every place in the state
- Kewaunee, WI17 miles from this station, 44.3°F a year
- Green Bay, WI18 miles from this station, 45.7°F a year
- Ashwaubenon, WI18 miles from this station, 45.1°F a year
- Brillion, WI19 miles from this station, 45.2°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made