Frost dates for Fort Bragg 5 N, CA
At Fort Bragg 5 N, the median last spring frost (32°F) is Mar 2 and the median first fall frost is Dec 1, for a typical growing season of 272 days. For a 90% chance that the last frost has passed, wait until Apr 6. Nearby ZIP codes are in USDA hardiness zones 9a to 10a.
- Mar 2Last spring frost (median)50% chance of 32°F after this date
- Apr 6Safer planting date10% chance of 32°F after this date
- Dec 1First fall frost (median)50% chance of 32°F by this date
- 272 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 26 | Apr 16 | May 11 |
| 32°F | Jan 8 | Mar 2 | Apr 6 |
| 28°F | Dec 5 | Jan 7 | Feb 21 |
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 | Oct 13 | Nov 6 | Nov 30 |
| 32°F | Nov 9 | Dec 1 | Jan 11 |
| 28°F | Nov 22 | Dec 21 | Feb 4 |
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 | 160 days | 201 days | 234 days |
| 32°F | 234 days | 272 days | 323 days |
| 28°F | 311 days | 360 days | 365 days |
| 24°F | 365 days | 365 days | 365 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 98% |
| 28°F | 55% |
| 24°F | 3% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 95437 | 9b | 25 to 30°F | 9 km |
| 95420 | 9b | 25 to 30°F | 17 km |
| 95417 | 9a | 20 to 25°F | 22 km |
| 95460 | 10a | 30 to 35°F | 23 km |
| 95488 | 9b | 25 to 30°F | 24 km |
| 95456 | 10a | 30 to 35°F | 28 km |
| 95410 | 9b | 25 to 30°F | 31 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 USC00043161, at 39.5092, -123.7567, elevation 38 m (123 ft).
- Data quality: Standard (24+ years of data), 28 years of freeze data.
- Average days per year at or below 32°F: 12.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Willits 1 NE (37 km)
- Covelo (56 km)
- Potter Valley Powerhouse (56 km)
- Richardson Gr State Park (58 km)
- Ukiah (62 km)
- Ukiah Muni Airport (64 km)
- Shelter Cove Aviation (64 km)
- Cloverdale (102 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.