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Will it freeze in Imperial Beach in the next 7 nights?
No overnight lows at or below 32°F are forecast in Imperial Beach during the next 7 nights in the available NWS frost forecast.
Tonight: forecast low 60°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 60°F Above 36°F · Partly Cloudy
- Fri, Nov 6 61°F Above 36°F · Mostly Clear
- Sat, Nov 7 64°F Above 36°F · Mostly Clear
- Sun, Nov 8 65°F Above 36°F · Partly Cloudy
- Mon, Nov 9 64°F Above 36°F · Partly Cloudy
- Tue, Nov 10 62°F Above 36°F · Mostly Clear
- Wed, Nov 11 62°F Above 36°F · Mostly Clear then Slight Chance Rain Showers
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 Imperial Beach
Most years have no 28°F hard freeze at San Diego Brown Field, according to NOAA’s 1991–2020 Climate Normals. Check the short-term forecast above during cold snaps.
| 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 | Dec 29 · Feb 2 · Mar 7 | Dec 1 · Dec 20 · Jan 25 | 326 days |
| 32°F freeze | Dec 13 · Jan 6 · Feb 5 | Dec 11 · Dec 31 · Jan 30 | 365 days |
| 28°F hard freeze | rare in most years | rare in most years | 365 days |
Average high temperature by month
1991–2020 normals at San Diego Brown Field
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 Imperial Beach, CA come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: San Diego Brown Field (station USW00003178, elevation 515 ft), 7.9 mi from Imperial Beach. 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 Imperial Beach
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Coronado, CA | 6.8 mi | rare | rare |
| National City, CA | 6.8 mi | rare | rare |
| Chula Vista, CA | 7.5 mi | rare | rare |
| Lemon Grove, CA | 12 mi | Jan 6 | Dec 21 |
| La Mesa, CA | 15 mi | Jan 6 | Dec 21 |
| San Diego, CA | 18 mi | Jan 6 | Dec 21 |
| El Cajon, CA | 19 mi | Jan 6 | Dec 21 |
| Santee, CA | 21 mi | Jan 6 | Dec 21 |
| Poway, CA | 30 mi | rare | rare |
| Solana Beach, CA | 30 mi | rare | rare |
Frequently asked questions
When is the last frost in Imperial Beach?
Imperial Beach doesn’t reach 32°F in a typical year, according to NOAA’s 1991–2020 normals for the nearest station.
When is the first frost in Imperial Beach?
Freezes are uncommon here; check the 7-night forecast above during cold snaps.
Can it frost in Imperial Beach 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 February 2.
What growing zone is Imperial Beach?
Imperial Beach is in USDA Plant Hardiness Zone 10b (average annual extreme minimum temperature 35 to 40°F), based on the 2023 USDA map for ZIP code 91932. See growing zones in California.
More: all California frost dates · California growing zones · UV index today in Imperial Beach · frost vs. freeze