Frost dates for Strawberry Valley, CA
At Strawberry Valley, the median last spring frost (32°F) is May 4 and the median first fall frost is Oct 30, for a typical growing season of 174 days. For a 90% chance that the last frost has passed, wait until May 31. Nearby ZIP codes are in USDA hardiness zones 8a to 9a.
- May 4Last spring frost (median)50% chance of 32°F after this date
- May 31Safer planting date10% chance of 32°F after this date
- Oct 30First fall frost (median)50% chance of 32°F by this date
- 174 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 6 | May 29 | Jun 14 |
| 32°F | Apr 18 | May 4 | May 31 |
| 28°F | Mar 23 | Apr 15 | May 8 |
| 24°F | Feb 8 | Mar 15 | Apr 14 |
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 | Sep 22 | Oct 9 | Oct 28 |
| 32°F | Oct 7 | Oct 30 | Nov 14 |
| 28°F | Oct 28 | Nov 16 | Dec 3 |
| 24°F | Nov 17 | Dec 6 | Dec 28 |
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 | 112 days | 136 days | 163 days |
| 32°F | 144 days | 174 days | 200 days |
| 28°F | 181 days | 212 days | 241 days |
| 24°F | 228 days | 267 days | 307 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 |
|---|---|---|---|
| 95930 | 9a | 20 to 25°F | 5 km |
| 95922 | 9a | 20 to 25°F | 11 km |
| 95925 | 9a | 20 to 25°F | 11 km |
| 95981 | 8a | 10 to 15°F | 12 km |
| 95941 | 9a | 20 to 25°F | 15 km |
| 95960 | 9a | 20 to 25°F | 16 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 USC00048606, at 39.5631, -121.1078, elevation 1161 m (3,808 ft).
- Data quality: Standard (24+ years of data), 30 years of freeze data.
- Average days per year at or below 32°F: 104.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Dobbins 1 S (24 km)
- Downieville (24 km)
- Nevada City (36 km)
- Oroville (39 km)
- Grass Valley #2 (40 km)
- Bowman Dam (41 km)
- Quincy (44 km)
- Oroville Muni Airport (45 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.