Frost dates for Mineral, CA
At Mineral, the median last spring frost (32°F) is Jun 10 and the median first fall frost is Sep 13, for a typical growing season of 96 days. For a 90% chance that the last frost has passed, wait until Jun 28. Nearby ZIP codes are in USDA hardiness zones 7a to 9b.
- Jun 10Last spring frost (median)50% chance of 32°F after this date
- Jun 28Safer planting date10% chance of 32°F after this date
- Sep 13First fall frost (median)50% chance of 32°F by this date
- 96 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 |
|---|---|---|---|
| 32°F | May 24 | Jun 10 | Jun 28 |
| 28°F | Apr 29 | May 19 | Jun 9 |
| 24°F | Apr 8 | Apr 26 | May 20 |
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 |
|---|---|---|---|
| 32°F | Aug 22 | Sep 13 | Oct 3 |
| 28°F | Sep 14 | Oct 7 | Oct 26 |
| 24°F | Oct 9 | Oct 31 | 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 | 29 days | 52 days | 80 days |
| 32°F | 68 days | 96 days | 122 days |
| 28°F | 108 days | 141 days | 167 days |
| 24°F | 154 days | 185 days | 211 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 |
|---|---|---|---|
| 96063 | 7b | 5 to 10°F | 3 km |
| 96061 | 7a | 0 to 5°F | 10 km |
| 96059 | 9a | 20 to 25°F | 21 km |
| 96075 | 9b | 25 to 30°F | 23 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 USC00045679, at 40.3458, -121.6092, elevation 1486 m (4,875 ft).
- Data quality: Representative (10+ years), 21 years of freeze data.
- Average days per year at or below 32°F: 201.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Manzanita Lake (22 km)
- Chester (31 km)
- Canyon Dam (48 km)
- De Sabla (53 km)
- Red Bluff Muni Airport (59 km)
- Burney (60 km)
- Redding Muni Airport (61 km)
- Hat Creek (65 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.