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Will it freeze in Big Bear Lake in the next 7 nights?
The earliest overnight low at or below 32°F in the available NWS frost forecast is Tonight: 32°F (Thu, Nov 5, 6:00 PM PST to Fri, Nov 6, 6:00 AM PST).
Tonight: forecast low 32°F. Freeze.
NWS forecast period: Thu, Nov 5, 6:00 PM PST to Fri, Nov 6, 6:00 AM PST.
7 of the next 7 nights are forecast at 36°F or colder, cold enough for frost on exposed plants.
- Tonight 32°F Freeze · Mostly Clear
- Fri, Nov 6 33°F Frost possible · Clear
- Sat, Nov 7 34°F Frost possible · Clear
- Sun, Nov 8 35°F Frost possible · Mostly Clear
- Mon, Nov 9 35°F Frost possible · Mostly Clear
- Tue, Nov 10 35°F Frost possible · Mostly Clear
- Wed, Nov 11 34°F Frost possible · Slight Chance Rain Showers then Mostly Clear
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 Big Bear Lake
The median first fall hard-freeze date (28°F) is October 20, from NOAA’s 1991–2020 Climate Normals at Big Bear Lake. 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 | May 27 · Jun 9 · Jun 29 | Aug 31 · Sep 20 · Oct 4 | 101 days |
| 32°F freeze | May 6 · May 27 · Jun 9 | Sep 21 · Oct 4 · Oct 20 | 131 days |
| 28°F hard freeze | Apr 17 · May 4 · May 27 | Oct 4 · Oct 20 · Nov 4 | 167 days |
Average high temperature by month
1991–2020 normals at Big Bear Lake
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 Big Bear Lake, CA come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Big Bear Lake (station USC00040741, elevation 6,753 ft), 1.3 mi from Big Bear Lake. 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 Big Bear Lake
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Yucaipa, CA | 17 mi | Jan 27 | Dec 19 |
| Highland, CA | 18 mi | Jan 27 | Dec 19 |
| Calimesa, CA | 20 mi | Jan 27 | Dec 19 |
| Banning, CA | 21 mi | Jan 31 | Dec 10 |
| Redlands, CA | 21 mi | Jan 27 | Dec 19 |
| San Bernardino, CA | 24 mi | Jan 27 | Dec 19 |
| Loma Linda, CA | 24 mi | Jan 27 | Dec 19 |
| Beaumont, CA | 25 mi | Jan 31 | Dec 10 |
| Hesperia, CA | 26 mi | Feb 28 | Dec 1 |
| Apple Valley, CA | 27 mi | Mar 18 | Nov 11 |
Frequently asked questions
When is the last frost in Big Bear Lake?
On average, the last spring frost (32°F) in Big Bear Lake is around May 27. In about 1 year in 10 it comes after June 9, and in 9 years in 10 it comes after May 6.
When is the first frost in Big Bear Lake?
The first fall frost (32°F) usually arrives around October 4. There’s a 10% chance of a freeze by September 21 and a 90% chance by October 20.
Can it frost in Big Bear Lake 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 June 9.
What growing zone is Big Bear Lake?
Big Bear Lake is in USDA Plant Hardiness Zone 7b (average annual extreme minimum temperature 5 to 10°F), based on the 2023 USDA map for ZIP code 92315. See growing zones in California.
More: all California frost dates · California growing zones · frost vs. freeze