Frost dates for Orland, CA
At Orland, the median last spring frost (32°F) is Feb 25 and the median first fall frost is Dec 2, for a typical growing season of 279 days. For a 90% chance that the last frost has passed, wait until Apr 6. Nearby ZIP codes are in USDA hardiness zone 9b.
- Feb 25Last spring frost (median)50% chance of 32°F after this date
- Apr 6Safer planting date10% chance of 32°F after this date
- Dec 2First fall frost (median)50% chance of 32°F by this date
- 279 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 | Mar 1 | Apr 3 | Apr 28 |
| 32°F | Jan 19 | Feb 25 | Apr 6 |
| 28°F | Dec 20 | Jan 15 | Feb 24 |
| 24°F | Dec 12 | Jan 1 | Jan 27 |
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 | Nov 2 | Nov 17 | Dec 1 |
| 32°F | Nov 17 | Dec 2 | Dec 21 |
| 28°F | Dec 1 | Dec 16 | Jan 18 |
| 24°F | Dec 8 | Dec 26 | Jan 22 |
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 | 196 days | 228 days | 262 days |
| 32°F | 237 days | 279 days | 318 days |
| 28°F | 299 days | 339 days | 365 days |
| 24°F | 345 days | 365 days | 365 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 84% |
| 24°F | 32% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 95963 | 9b | 25 to 30°F | 9 km |
| 95913 | 9b | 25 to 30°F | 13 km |
| 96021 | 9b | 25 to 30°F | 21 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 USC00046506, at 39.7458, -122.1997, elevation 77 m (254 ft).
- Data quality: Standard (24+ years of data), 29 years of freeze data.
- Average days per year at or below 32°F: 16.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Willows 6 W (26 km)
- Chico Univ Farm (33 km)
- Stony Gorge Rsvr (34 km)
- Red Bluff Muni Airport (45 km)
- Paradise (49 km)
- East Park Rsvr (51 km)
- De Sabla (52 km)
- Oroville Muni Airport (57 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.