Frost dates for Fredericksburg, TX
At Fredericksburg, the median last spring frost (32°F) is Mar 18 and the median first fall frost is Nov 10, for a typical growing season of 235 days. For a 90% chance that the last frost has passed, wait until Apr 9. Nearby ZIP codes are in USDA hardiness zone 8b.
- Mar 18Last spring frost (median)50% chance of 32°F after this date
- Apr 9Safer planting date10% chance of 32°F after this date
- Nov 10First fall frost (median)50% chance of 32°F by this date
- 235 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 13 | Apr 3 | Apr 20 |
| 32°F | Feb 27 | Mar 18 | Apr 9 |
| 28°F | Feb 13 | Mar 4 | Mar 24 |
| 24°F | Jan 22 | Feb 22 | 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 17 | Nov 1 | Nov 15 |
| 32°F | Oct 27 | Nov 10 | Nov 28 |
| 28°F | Nov 2 | Nov 22 | Dec 11 |
| 24°F | Nov 14 | Dec 5 | Jan 1 |
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 | 188 days | 211 days | 235 days |
| 32°F | 211 days | 235 days | 261 days |
| 28°F | 233 days | 259 days | 288 days |
| 24°F | 256 days | 289 days | 328 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 |
|---|---|---|---|
| 78624 | 8b | 15 to 20°F | 7 km |
| 78675 | 8b | 15 to 20°F | 29 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 USC00413329, at 30.2392, -98.9089, elevation 514 m (1,685 ft).
- Data quality: Standard (24+ years of data), 25 years of freeze data.
- Average days per year at or below 32°F: 42.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Kerrville 3 NNE (27 km)
- Harper 3ene (29 km)
- Johnson City 2n (48 km)
- Blanco (50 km)
- Boerne (52 km)
- Medina 1ne (58 km)
- Hunt 10 W (61 km)
- Llano (61 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.