Frost dates for Barstow Daggett Airport, CA
At Barstow Daggett Airport, the median last spring frost (32°F) is Feb 19 and the median first fall frost is Nov 26, for a typical growing season of 279 days. For a 90% chance that the last frost has passed, wait until Mar 11. Nearby ZIP codes are in USDA hardiness zone 9a.
- Feb 19Last spring frost (median)50% chance of 32°F after this date
- Mar 11Safer planting date10% chance of 32°F after this date
- Nov 26First 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 | Feb 18 | Mar 11 | Apr 6 |
| 32°F | Jan 23 | Feb 19 | Mar 11 |
| 28°F | Dec 29 | Jan 28 | Feb 25 |
| 24°F | Dec 12 | Jan 7 | Feb 6 |
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 31 | Nov 16 | Nov 29 |
| 32°F | Nov 10 | Nov 26 | Dec 11 |
| 28°F | Nov 22 | Dec 9 | Jan 1 |
| 24°F | Dec 1 | Dec 22 | Jan 21 |
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 | 215 days | 247 days | 274 days |
| 32°F | 252 days | 279 days | 309 days |
| 28°F | 283 days | 317 days | 349 days |
| 24°F | 320 days | 351 days | 365 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 98% |
| 24°F | 68% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 92327 | 9a | 20 to 25°F | 5 km |
| 92398 | 9a | 20 to 25°F | 16 km |
| 92365 | 9a | 20 to 25°F | 21 km |
| 92338 | 9a | 20 to 25°F | 49 km |
| 92310 | 9a | 20 to 25°F | 54 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 USW00023161, at 34.8536, -116.7858, elevation 584 m (1,917 ft).
- Data quality: Standard (24+ years of data), 26 years of freeze data.
- Average days per year at or below 32°F: 24.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Barstow (22 km)
- Victorville (59 km)
- Johnson Valley (59 km)
- Hesperia 2e (65 km)
- Big Bear Lake (69 km)
- Lake Arrowhead (77 km)
- Yucca Mesa (79 km)
- Baker (81 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.