Illinois frost advisories
There are no frost advisories in Illinois right now. The last one was issued on November 7, 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 Illinois
None right now. Other active alerts in Illinois: none.
Frost Advisories in Illinois by year
Illinois averaged 20.4 frost advisories per year from 2016 to 2025, and has had 18 so far in 2026. The most recent was issued on November 7, 2026.
Counties with the most frost advisories
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.
More Illinois alerts
- Tornado Warnings
- Tornado Watches
- Severe Thunderstorm Warnings
- Flash Flood Warnings
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- Flood Watches
- Winter Storm Warnings
- Winter Storm Watches
- Winter Weather Advisories
- Cold Weather Advisories
- Freeze Warnings
- Heat Advisories
- Extreme Heat Warnings
- High Wind Warnings
- Wind Advisories
- Red Flag Warnings
- Dense Fog Advisories
- All Illinois alerts