Frost dates for Big Bear Lake, CA
At Big Bear Lake, the median last spring frost (32°F) is May 27 and the median first fall frost is Oct 4, for a typical growing season of 131 days. For a 90% chance that the last frost has passed, wait until Jun 9. Nearby ZIP codes are in USDA hardiness zones 7a to 8b.
- May 27Last spring frost (median)50% chance of 32°F after this date
- Jun 9Safer planting date10% chance of 32°F after this date
- Oct 4First fall frost (median)50% chance of 32°F by this date
- 131 daysGrowing season (median)between 32°F freezes
Last spring frost dates
The chance that the temperature drops to the threshold after each date.
| Temperature | 90% chance later | 50% chance later | 10% chance later |
|---|---|---|---|
| 36°F | May 27 | Jun 9 | Jun 29 |
| 32°F | May 6 | May 27 | Jun 9 |
| 28°F | Apr 17 | May 4 | May 27 |
| 24°F | Mar 28 | Apr 15 | May 1 |
First fall frost dates
The chance that the temperature has dropped to the threshold by each date.
| Temperature | 10% chance by | 50% chance by | 90% chance by |
|---|---|---|---|
| 36°F | Aug 31 | Sep 20 | Oct 4 |
| 32°F | Sep 21 | Oct 4 | Oct 20 |
| 28°F | Oct 4 | Oct 20 | Nov 4 |
| 24°F | Oct 17 | Nov 4 | Nov 20 |
Growing season length
Days between the last spring and first fall freeze, as the length reached in 9, 5 and 1 out of 10 years.
| Temperature | 9 in 10 years at least | 5 in 10 years at least | 1 in 10 years at least |
|---|---|---|---|
| 36°F | 74 days | 101 days | 124 days |
| 32°F | 109 days | 131 days | 154 days |
| 28°F | 141 days | 167 days | 192 days |
| 24°F | 179 days | 204 days | 228 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 100% |
| 24°F | 100% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 92315 | 7b | 5 to 10°F | 4 km |
| 92333 | 7a | 0 to 5°F | 6 km |
| 92386 | 7a | 0 to 5°F | 8 km |
| 92314 | 7a | 0 to 5°F | 11 km |
| 92305 | 7a | 0 to 5°F | 12 km |
| 92339 | 7b | 5 to 10°F | 19 km |
| 92356 | 8b | 15 to 20°F | 28 km |
Not the official USDA Plant Hardiness Zone Map. Zones shown here are the values published in the USDA-ARS / Oregon State University PRISM Group 2023 ZIP code tables, shown unaltered. For the official interactive map, visit planthardiness.ars.usda.gov.
About this station
- NOAA station ID USC00040741, at 34.2431, -116.9169, elevation 2058 m (6,753 ft).
- Data quality: Standard (24+ years of data), 28 years of freeze data.
- Average days per year at or below 32°F: 176.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Lake Arrowhead (25 km)
- Redlands (34 km)
- Morongo Valley N (37 km)
- Johnson Valley (37 km)
- Hesperia 2e (38 km)
- Victorville (47 km)
- Yucca Mesa (47 km)
- San Jacinto (50 km)
Sources
- NOAA National Centers for Environmental Information, U.S. Climate Normals 1991–2020, annual/seasonal normals by station (version 1.0.1), file dated June 27, 2023; documentation.
- USDA Agricultural Research Service and PRISM Group, Oregon State University, 2023 Plant Hardiness Zone Map ZIP code tables (CONUS, Alaska, Hawaii, Puerto Rico), files dated November 17, 2023. Data © PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed November 1, 2026. Official map: planthardiness.ars.usda.gov.
- U.S. Census Bureau, 2024 Gazetteer ZIP Code Tabulation Areas file, dated August 30, 2024 (ZIP centroids used to find the nearest station).
Freeze dates are 30-year probabilities, not forecasts. Check your local forecast before planting tender plants.