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Will it freeze in Willows in the next 7 nights?
No overnight lows at or below 32°F are forecast in Willows during the next 7 nights in the available NWS frost forecast.
Tonight: forecast low 45°F. Above 36°F.
NWS forecast period: Thu, Nov 5, 6:00 PM PST to Fri, Nov 6, 6:00 AM PST.
No nights at or below 36°F in the National Weather Service forecast for the next 7 nights.
- Tonight 45°F Above 36°F · Mostly Clear
- Fri, Nov 6 42°F Above 36°F · Clear
- Sat, Nov 7 44°F Above 36°F · Mostly Clear
- Sun, Nov 8 45°F Above 36°F · Partly Cloudy
- Mon, Nov 9 45°F Above 36°F · Mostly Clear
- Tue, Nov 10 46°F Above 36°F · Partly Cloudy
- Wed, Nov 11 45°F Above 36°F · Chance Light Rain
Overnight lows from the National Weather Service forecast for this location. This covers the available forecast window, not the first freeze of the whole season. Frost can form above 32°F on clear, calm nights.
Frost and freeze probabilities
Freeze dates shift from year to year. Spring percentages describe the chance of a freeze after the stated date; fall percentages describe the chance of a freeze by that date. The 10% spring date is the cautious one: a later freeze happens about 1 year in 10.
These dates describe historical probabilities, not this year’s forecast or the earliest and latest possible freezes. Different weather stations or probability thresholds can produce different published dates for the same city.
Average first hard freeze in Willows
The median first fall hard-freeze date (28°F) is December 18, from NOAA’s 1991–2020 Climate Normals at Willows 6 W. This is the 50% probability date, not a forecast for this year.
| Temperature | Last spring date 90% · 50% · 10% chance of a later freeze | First fall date 10% · 50% · 90% chance of an earlier freeze | Season |
|---|---|---|---|
| 36°F frost possible | Feb 25 · Apr 2 · Apr 25 | Nov 7 · Nov 23 · Dec 7 | 233 days |
| 32°F freeze | Jan 4 · Feb 21 · Apr 9 | Nov 16 · Dec 6 · Dec 29 | 289 days |
| 28°F hard freeze | Dec 14 · Jan 5 · Feb 24 | Nov 30 · Dec 18 · Jan 27 | 348 days |
Average high temperature by month
1991–2020 normals at Willows 6 W
Average low temperature by month
Months with lows near or below freezing carry frost risk
Where these frost dates come from
The frost dates for Willows, CA come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Willows 6 W (station USC00049699, elevation 234 ft), 5.7 mi from Willows. Local conditions (valleys, hilltops, distance to water, city heat) can shift frost dates by days or weeks. The hardiness zone is from the 2023 USDA Plant Hardiness Zone Map (USDA ARS and Oregon State University PRISM). See our methodology.
Frost dates near Willows
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Orland, CA | 16 mi | Feb 25 | Dec 2 |
| Colusa, CA | 24 mi | Feb 14 | Dec 1 |
| Williams, CA | 25 mi | Feb 14 | Dec 1 |
| Chico, CA | 26 mi | Mar 4 | Nov 17 |
| Corning, CA | 29 mi | Feb 25 | Dec 2 |
| Gridley, CA | 29 mi | Jan 29 | Dec 7 |
| Live Oak, CA | 33 mi | Jan 15 | Dec 12 |
| Oroville, CA | 34 mi | Jan 30 | Dec 13 |
| Paradise, CA | 35 mi | Feb 7 | Dec 18 |
| Yuba City, CA | 40 mi | Jan 15 | Dec 12 |
Frequently asked questions
When is the last frost in Willows?
On average, the last spring frost (32°F) in Willows is around February 21. In about 1 year in 10 it comes after April 9, and in 9 years in 10 it comes after January 4.
When is the first frost in Willows?
The first fall frost (32°F) usually arrives around December 6. There’s a 10% chance of a freeze by November 16 and a 90% chance by December 29.
Can it frost in Willows after the last frost date?
Yes. Frost can form on clear, calm nights even when the air stays above 32°F. Temperatures of 36°F or lower, cold enough for frost on exposed plants, have a 50% chance of occurring after April 2.
What growing zone is Willows?
Willows is in USDA Plant Hardiness Zone 9b (average annual extreme minimum temperature 25 to 30°F), based on the 2023 USDA map for ZIP code 95988. See growing zones in California.
More: all California frost dates · California growing zones · frost vs. freeze