Frost dates for San Manuel, TX
At San Manuel, the median last spring frost (32°F) is Jan 25 and the median first fall frost is Jan 1, for a typical growing season of 343 days. For a 90% chance that the last frost has passed, wait until Mar 5. Nearby ZIP codes are in USDA hardiness zones 9b to 10a.
- Jan 25Last spring frost (median)50% chance of 32°F after this date
- Mar 5Safer planting date10% chance of 32°F after this date
- Jan 1First fall frost (median)50% chance of 32°F by this date
- 343 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 | Jan 6 | Feb 12 | Mar 13 |
| 32°F | Dec 20 | Jan 25 | Mar 5 |
| 28°F | Dec 11 | Jan 9 | Mar 1 |
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 16 | Dec 10 | Jan 12 |
| 32°F | Dec 1 | Jan 1 | Feb 5 |
| 28°F | Dec 8 | Jan 5 | Feb 22 |
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 | 264 days | 303 days | 344 days |
| 32°F | 296 days | 343 days | 365 days |
| 28°F | 339 days | 365 days | 365 days |
| 24°F | 365 days | 365 days | 365 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 99% |
| 32°F | 71% |
| 28°F | 26% |
| 24°F | 6% |
Closest ZIP codes (each is closer to another station)
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 78549 | 9b | 25 to 30°F | 12 km |
| 78540 | 9b | 25 to 30°F | 13 km |
| 78542 | 10a | 30 to 35°F | 15 km |
| 78563 | 9b | 25 to 30°F | 18 km |
| 78541 | 10a | 30 to 35°F | 20 km |
| 78561 | 10a | 30 to 35°F | 23 km |
| 78538 | 10a | 30 to 35°F | 26 km |
| 78543 | 10a | 30 to 35°F | 32 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 USC00417981, at 26.5650, -98.1203, elevation 23 m (75 ft).
- Data quality: Representative (10+ years), 14 years of freeze data.
- Average days per year at or below 32°F: 5.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- McCook (0 km)
- Edinburg 17 NNE (7 km)
- Edinburg (30 km)
- La Joya (34 km)
- Raymondville (35 km)
- Santa Rosa 3 WNW (42 km)
- McAllen (44 km)
- McAllen Miller Intl Airport (44 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.