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Will it freeze in Oroville in the next 7 nights?
No overnight lows at or below 32°F are forecast in Oroville during the next 7 nights in the available NWS frost forecast.
Tonight: forecast low 47°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 47°F Above 36°F · Mostly Clear
- Fri, Nov 6 48°F Above 36°F · Clear
- Sat, Nov 7 50°F Above 36°F · Mostly Clear
- Sun, Nov 8 49°F Above 36°F · Partly Cloudy
- Mon, Nov 9 49°F Above 36°F · Mostly Clear
- Tue, Nov 10 50°F Above 36°F · Partly Cloudy then Slight Chance Light Rain
- Wed, Nov 11 50°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 Oroville
The median first fall hard-freeze date (28°F) is December 25, from NOAA’s 1991–2020 Climate Normals at Oroville. 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 3 · Mar 8 · Apr 17 | Nov 8 · Nov 27 · Dec 18 | 263 days |
| 32°F freeze | Dec 26 · Jan 30 · Mar 3 | Nov 21 · Dec 13 · Jan 11 | 321 days |
| 28°F hard freeze | Dec 14 · Jan 5 · Feb 4 | Dec 5 · Dec 25 · Jan 25 | 361 days |
Average high temperature by month
1991–2020 normals at Oroville
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 Oroville, CA come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Oroville (station USC00046521, elevation 171 ft), 1.6 mi from Oroville. 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 Oroville
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Gridley, CA | 12 mi | Jan 29 | Dec 7 |
| Live Oak, CA | 16 mi | Jan 15 | Dec 12 |
| Paradise, CA | 18 mi | Feb 7 | Dec 18 |
| Chico, CA | 23 mi | Mar 4 | Nov 17 |
| Marysville, CA | 24 mi | Jan 15 | Dec 12 |
| Yuba City, CA | 25 mi | Jan 15 | Dec 12 |
| Colusa, CA | 32 mi | Feb 14 | Dec 1 |
| Grass Valley, CA | 33 mi | Apr 10 | Nov 13 |
| Willows, CA | 34 mi | Feb 21 | Dec 6 |
| Orland, CA | 37 mi | Feb 25 | Dec 2 |
Frequently asked questions
When is the last frost in Oroville?
On average, the last spring frost (32°F) in Oroville is around January 30. In about 1 year in 10 it comes after March 3, and in 9 years in 10 it comes after December 26.
When is the first frost in Oroville?
The first fall frost (32°F) usually arrives around December 13. There’s a 10% chance of a freeze by November 21 and a 90% chance by January 11.
Can it frost in Oroville 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 8.
What growing zone is Oroville?
Oroville 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 95968. See growing zones in California.
More: all California frost dates · California growing zones · frost vs. freeze