Updated October 2026
Willow River State Park: Weather by Month and When to Go
Willow River State Park is a state park in Wisconsin. Average highs range from 27°F in January to 85°F in July.
Average highs sit between 60°F and 80°F in April through May and September through October. They run above 80°F in June through August and below 60°F in November through March. The figures are NOAA climate normals for 1991–2020, measured at a weather station 5.5 miles from the park.
Warmest average high
85°F
July
Coldest average low
9°F
January
Most precipitation
5.4 in
June
Longest days
15.4 h
June
Willow River State Park weather by month
| Month | Average high | Average low | Precipitation | Daylight |
|---|---|---|---|---|
| January | 27°F | 9°F | 1.0 in | 8.9 h |
| February | 32°F | 14°F | 0.9 in | 10.2 h |
| March | 45°F | 25°F | 1.5 in | 11.6 h |
| April | 60°F | 38°F | 3.1 in | 13.3 h |
| May | 73°F | 50°F | 4.2 in | 14.7 h |
| June | 81°F | 60°F | 5.4 in | 15.4 h |
| July | 85°F | 64°F | 4.5 in | 15.1 h |
| August | 84°F | 62°F | 5.3 in | 13.9 h |
| September | 76°F | 55°F | 3.2 in | 12.3 h |
| October | 62°F | 42°F | 3.2 in | 10.7 h |
| November | 45°F | 28°F | 1.7 in | 9.3 h |
| December | 32°F | 16°F | 1.2 in | 8.6 h |
Temperature and precipitation figures are NOAA climate normals for 1991–2020 from station USC00218037, the nearest station with a complete set of temperature normals, 5.5 miles from the park. Conditions in the park can differ from the station's, most of all where the two sit at different elevations. Daylight is calculated for the park's latitude at the middle of each month.
What the averages show
- Temperature. July is the warmest month, with an average high of 85°F and an average low of 64°F. January is the coldest month, with an average low of 9°F and an average high of 27°F.
- Precipitation. June is the wettest month, averaging 5.4 inches of precipitation, and February is the driest, at 0.9 inches. An average year brings about 35.2 inches in total.
- Snowfall. The station has no snowfall normal, so snowfall is left out of the table. That is a gap in the station's record, not a sign that it never snows here.
- Daylight. Days run from about 8.6 hours of daylight in December to 15.4 hours in June.
Camping, trails, maps and fees
Whether Willow River State Park has camping or cabins, where its trails run, when it opens and what it charges are all published by the agency that runs the park. Its official page is the place to check before a trip.
Official Willow River State Park page
For the forecast rather than the averages, the National Weather Service issues a point forecast for the park's location.
National Weather Service forecast for Willow River State Park
Where to stay near Willow River State Park
Hotels, cabins and vacation rentals near Willow River State Park, with live availability and prices.
Top-rated places to stay near Willow River State Park
Prices for Oct 16–18, 4 adults. Change dates on the map below.
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Frequently Asked Questions
July is the warmest month, with an average high of 85°F and an average low of 64°F. January is the coldest month, with an average low of 9°F and an average high of 27°F. These are NOAA 1991–2020 climate normals from a weather station 5.5 miles from the park.
Average highs sit between 60°F and 80°F in April through May and September through October. They run above 80°F in June through August and below 60°F in November through March.
June is the wettest month, averaging 5.4 inches of precipitation, and February is the driest, at 0.9 inches. An average year brings about 35.2 inches in total. The station has no snowfall normal, so no snowfall figure is available.
Days run from about 8.6 hours of daylight in December to 15.4 hours in June. The hours are calculated for the park's latitude.
Nearest National Park Service sites
- Mississippi National River & Recreation Area21 miles away
- Saint Croix National Scenic Riverway50 miles away
- Effigy Mounds National Monument153 miles away
Nearby state parks
- Afton State Park12 miles away · Minnesota
- Interstate State Park26 miles away · Minnesota
- Fort Snelling State Park27 miles away · Minnesota
- Whitewater State Park74 miles away · Minnesota
Distances are measured in a straight line from the park, so the drive is longer.
Sources: NOAA NCEI U.S. Climate Normals 1991–2020; USGS Protected Areas Database for location; the official Wisconsin state park listing for the park's name.