Frost dates for Hanford 1 S, CA
At Hanford 1 S, the median last spring frost (32°F) is Feb 7 and the median first fall frost is Dec 1, for a typical growing season of 296 days. For a 90% chance that the last frost has passed, wait until Mar 4. Nearby ZIP codes are in USDA hardiness zone 9a.
- Feb 7Last spring frost (median)50% chance of 32°F after this date
- Mar 4Safer planting date10% chance of 32°F after this date
- Dec 1First fall frost (median)50% chance of 32°F by this date
- 296 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 9 | Mar 3 | Apr 10 |
| 32°F | Jan 9 | Feb 7 | Mar 4 |
| 28°F | Dec 16 | Jan 12 | Feb 9 |
| 24°F | Dec 13 | Dec 31 | Jan 23 |
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 1 | Nov 17 | Dec 1 |
| 32°F | Nov 16 | Dec 1 | Dec 22 |
| 28°F | Nov 28 | Dec 14 | Jan 13 |
| 24°F | Dec 6 | Dec 24 | Jan 16 |
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 | 213 days | 252 days | 282 days |
| 32°F | 263 days | 296 days | 332 days |
| 28°F | 307 days | 339 days | 365 days |
| 24°F | 342 days | 365 days | 365 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 99% |
| 28°F | 84% |
| 24°F | 34% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 93230 | 9a | 20 to 25°F | 3 km |
| 93202 | 9a | 20 to 25°F | 6 km |
| 93242 | 9a | 20 to 25°F | 16 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 USC00043747, at 36.3158, -119.6369, elevation 72 m (237 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
- Hanford Muni Airport (1 km)
- Corcoran Irrig Dist (25 km)
- Lemoore Reeves NAS (28 km)
- Visalia (30 km)
- Kettleman City (45 km)
- Five Points 5 SSW (47 km)
- Fresno 5 NE (51 km)
- Fresno Yosemite Intl Airport (52 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.