Wisconsin frost advisories
There are no frost advisories in Wisconsin right now. The last one was issued on October 17, 2026.
Lows in the mid 30s will allow frost to form and may harm sensitive plants.
Updated from the National Weather Service · lists refresh hourly; the live map loads current alerts directly from the NWS
Map data: NWS, OpenFreeMap, OpenStreetMap
Active frost advisories in Wisconsin
None right now. Other active alerts in Wisconsin: none.
Frost Advisories in Wisconsin by year
Wisconsin averaged 31.2 frost advisories per year from 2016 to 2025, and has had 52 so far in 2026. The most recent was issued on October 17, 2026.
Counties with the most frost advisories
| County | 2016–2025 |
|---|---|
| Marinette County | 55 |
| Oconto County | 54 |
| Forest County | 52 |
| Vilas County | 51 |
| Oneida County | 51 |
| Lincoln County | 50 |
| Florence County | 49 |
| Iron County | 47 |
| Price County | 46 |
| Ashland County | 44 |
What a frost advisory means
Frost can form on clear, calm nights even when the air temperature stays a few degrees above freezing, typically with lows of 33 to 36°F. Frost advisories are issued during the growing season.
More about frost advisories and the national map →
What to do
- Cover tender plants with sheets or buckets overnight.