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Will it freeze in Red Bluff in the next 7 nights?
No overnight lows at or below 32°F are forecast in Red Bluff during the next 7 nights in the available NWS frost forecast.
Tonight: forecast low 46°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 46°F Above 36°F · Mostly Clear
- Fri, Nov 6 45°F Above 36°F · Clear
- Sat, Nov 7 45°F Above 36°F · Mostly Clear
- Sun, Nov 8 46°F Above 36°F · Partly Cloudy
- Mon, Nov 9 46°F Above 36°F · Mostly Clear
- Tue, Nov 10 47°F Above 36°F · Partly Cloudy then Slight Chance Light Rain
- Wed, Nov 11 46°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 Red Bluff
The median first fall hard-freeze date (28°F) is December 15, from NOAA’s 1991–2020 Climate Normals at Red Bluff Municipal Airport. 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 | Mar 1 · Mar 30 · Apr 19 | Nov 1 · Nov 15 · Nov 30 | 231 days |
| 32°F freeze | Jan 17 · Feb 22 · Mar 30 | Nov 12 · Nov 29 · Dec 18 | 281 days |
| 28°F hard freeze | Dec 18 · Jan 13 · Feb 21 | Nov 28 · Dec 15 · Jan 12 | 336 days |
Average high temperature by month
1991–2020 normals at Red Bluff Municipal Airport
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 Red Bluff, CA come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Red Bluff Municipal Airport (station USW00024216, elevation 353 ft), 1.6 mi from Red Bluff. 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 Red Bluff
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Corning, CA | 17 mi | Feb 25 | Dec 2 |
| Anderson, CA | 19 mi | Mar 3 | Nov 21 |
| Redding, CA | 28 mi | Mar 3 | Nov 21 |
| Orland, CA | 30 mi | Feb 25 | Dec 2 |
| Shasta Lake, CA | 35 mi | Feb 8 | Dec 28 |
| Chico, CA | 37 mi | Mar 4 | Nov 17 |
| Paradise, CA | 44 mi | Feb 7 | Dec 18 |
| Willows, CA | 45 mi | Feb 21 | Dec 6 |
| Oroville, CA | 59 mi | Jan 30 | Dec 13 |
| Gridley, CA | 63 mi | Jan 29 | Dec 7 |
Frequently asked questions
When is the last frost in Red Bluff?
On average, the last spring frost (32°F) in Red Bluff is around February 22. In about 1 year in 10 it comes after March 30, and in 9 years in 10 it comes after January 17.
When is the first frost in Red Bluff?
The first fall frost (32°F) usually arrives around November 29. There’s a 10% chance of a freeze by November 12 and a 90% chance by December 18.
Can it frost in Red Bluff 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 March 30.
What growing zone is Red Bluff?
Red Bluff is in USDA Plant Hardiness Zone 9a (average annual extreme minimum temperature 20 to 25°F), based on the 2023 USDA map for ZIP code 96078. See growing zones in California.
More: all California frost dates · California growing zones · frost vs. freeze