California frost advisories
There are no frost advisories in California right now. The last one was issued on November 6, 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
Active frost advisories in California
None right now. Other active alerts in California: 19 (see the California alerts page).
Frost Advisories in California by year
California averaged 87.1 frost advisories per year from 2016 to 2025, and has had 46 so far in 2026. The most recent was issued on November 6, 2026.
Counties with the most frost advisories
| County | 2016–2025 |
|---|---|
| Mendocino County | 325 |
| Humboldt County | 250 |
| Del Norte County | 146 |
| Lake County | 145 |
| Trinity County | 119 |
| Ventura County | 90 |
| Santa Barbara County | 89 |
| San Luis Obispo County | 88 |
| Riverside County | 56 |
| Monterey County | 55 |
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.