Frost dates for Yosemite Park HQ, CA
At Yosemite Park HQ, the median last spring frost (32°F) is Apr 21 and the median first fall frost is Oct 27, for a typical growing season of 186 days. For a 90% chance that the last frost has passed, wait until May 13. Nearby ZIP codes are in USDA hardiness zones 6a to 9a.
- Apr 21Last spring frost (median)50% chance of 32°F after this date
- May 13Safer planting date10% chance of 32°F after this date
- Oct 27First fall frost (median)50% chance of 32°F by this date
- 186 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 | Apr 22 | May 10 | Jun 3 |
| 32°F | Apr 3 | Apr 21 | May 13 |
| 28°F | Mar 5 | Apr 2 | Apr 22 |
| 24°F | Feb 1 | Mar 5 | Apr 4 |
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 1 | Oct 16 | Nov 1 |
| 32°F | Oct 12 | Oct 27 | Nov 10 |
| 28°F | Oct 20 | Nov 9 | Nov 28 |
| 24°F | Oct 31 | Nov 27 | Dec 17 |
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 | 127 days | 157 days | 182 days |
| 32°F | 160 days | 186 days | 212 days |
| 28°F | 189 days | 220 days | 252 days |
| 24°F | 228 days | 264 days | 305 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 100% |
| 24°F | 100% |
Closest ZIP codes (each is closer to another station)
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 95389 | 7a | 0 to 5°F | 15 km |
| 95318 | 8b | 15 to 20°F | 21 km |
| 95321 | 6a | -10 to -5°F | 30 km |
| 93623 | 8a | 10 to 15°F | 31 km |
| 93529 | 6a | -10 to -5°F | 35 km |
| 93644 | 9a | 20 to 25°F | 37 km |
| 95345 | 9a | 20 to 25°F | 37 km |
| 93601 | 9a | 20 to 25°F | 42 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 USC00049855, at 37.7503, -119.5897, elevation 1225 m (4,018 ft).
- Data quality: Representative (10+ years), 21 years of freeze data.
- Average days per year at or below 32°F: 106.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Yosemite Village 12 W (20 km)
- Tuolumne Meadows Ranger Station (26 km)
- So Entrance Yosemite National Park (27 km)
- Hetch Hetchy (29 km)
- Cherry Valley Dam (38 km)
- Lee Vining (47 km)
- Mammoth Lakes Ranger Station (56 km)
- Groveland 2 (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.