Frost dates for San Angelo, TX
At San Angelo, the median last spring frost (32°F) is Mar 20 and the median first fall frost is Nov 10, for a typical growing season of 232 days. For a 90% chance that the last frost has passed, wait until Apr 12. Nearby ZIP codes are in USDA hardiness zone 8a.
- Mar 20Last spring frost (median)50% chance of 32°F after this date
- Apr 12Safer planting date10% chance of 32°F after this date
- Nov 10First fall frost (median)50% chance of 32°F by this date
- 232 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 18 | Apr 7 | Apr 25 |
| 32°F | Mar 1 | Mar 20 | Apr 12 |
| 28°F | Feb 17 | Mar 6 | Mar 30 |
| 24°F | Jan 28 | Feb 23 | Mar 14 |
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 19 | Nov 1 | Nov 14 |
| 32°F | Oct 28 | Nov 10 | Nov 28 |
| 28°F | Nov 5 | Nov 22 | Dec 8 |
| 24°F | Nov 14 | Dec 3 | Dec 28 |
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 | 186 days | 208 days | 231 days |
| 32°F | 205 days | 232 days | 258 days |
| 28°F | 233 days | 259 days | 285 days |
| 24°F | 258 days | 285 days | 320 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 100% |
| 24°F | 100% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 76909 | 8a | 10 to 15°F | 8 km |
| 76908 | 8a | 10 to 15°F | 11 km |
| 76904 | 8a | 10 to 15°F | 11 km |
| 76903 | 8a | 10 to 15°F | 13 km |
| 76905 | 8a | 10 to 15°F | 22 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 USW00023034, at 31.3711, -100.4922, elevation 576 m (1,890 ft).
- Data quality: Standard (24+ years of data), 26 years of freeze data.
- Average days per year at or below 32°F: 49.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- San Angelo WFO (0 km)
- Mertzon 12nnw (37 km)
- Water Valley (40 km)
- Paint Rock (55 km)
- Eldorado (57 km)
- Robert Lee 4wsw (57 km)
- Eden (63 km)
- Ballinger 2 NW (64 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.