Frost dates for Livermore Muni Airport, CA
At Livermore Muni Airport, the median last spring frost (32°F) is Feb 27 and the median first fall frost is Dec 1, for a typical growing season of 278 days. For a 90% chance that the last frost has passed, wait until Mar 29. Nearby ZIP codes are in USDA hardiness zone 9b.
- Feb 27Last spring frost (median)50% chance of 32°F after this date
- Mar 29Safer planting date10% chance of 32°F after this date
- Dec 1First fall frost (median)50% chance of 32°F by this date
- 278 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 10 | Apr 1 | Apr 22 |
| 32°F | Jan 22 | Feb 27 | Mar 29 |
| 28°F | Dec 19 | Jan 19 | Feb 23 |
| 24°F | Dec 14 | Jan 4 | Jan 30 |
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 16 | Dec 1 |
| 32°F | Nov 14 | Dec 1 | Dec 22 |
| 28°F | Nov 27 | Dec 15 | Jan 13 |
| 24°F | Dec 7 | Dec 29 | Jan 25 |
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 | 202 days | 227 days | 254 days |
| 32°F | 243 days | 278 days | 316 days |
| 28°F | 299 days | 335 days | 365 days |
| 24°F | 341 days | 365 days | 365 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 85% |
| 24°F | 34% |
Closest ZIP codes (each is closer to another station)
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 94566 | 9b | 25 to 30°F | 6 km |
| 94568 | 9b | 25 to 30°F | 8 km |
| 94551 | 9b | 25 to 30°F | 9 km |
| 94588 | 9b | 25 to 30°F | 12 km |
| 94582 | 9b | 25 to 30°F | 12 km |
| 94586 | 9b | 25 to 30°F | 14 km |
| 94506 | 9b | 25 to 30°F | 15 km |
| 94552 | 9b | 25 to 30°F | 17 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 USW00023285, at 37.6928, -121.8144, elevation 120 m (393 ft).
- Data quality: Representative (10+ years), 19 years of freeze data.
- Average days per year at or below 32°F: 19.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Livermore (0 km)
- Mount Diablo Junction (23 km)
- Tracy Pumping Plant (23 km)
- Fremont (24 km)
- Hayward Air Terminal (27 km)
- Newark (28 km)
- Antioch Pumping Plant #3 (33 km)
- Oakland Metro Intl Airport (36 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.