Frost dates for Dekalb, TX
At Dekalb, the median last spring frost (32°F) is Mar 26 and the median first fall frost is Nov 6, for a typical growing season of 225 days. For a 90% chance that the last frost has passed, wait until Apr 14. Nearby ZIP codes are in USDA hardiness zones 8a to 8b.
- Mar 26Last spring frost (median)50% chance of 32°F after this date
- Apr 14Safer planting date10% chance of 32°F after this date
- Nov 6First fall frost (median)50% chance of 32°F by this date
- 225 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 20 | Apr 7 | Apr 24 |
| 32°F | Mar 6 | Mar 26 | Apr 14 |
| 28°F | Feb 21 | Mar 11 | Mar 31 |
| 24°F | Jan 31 | Feb 28 | Mar 17 |
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 14 | Oct 29 | Nov 12 |
| 32°F | Oct 22 | Nov 6 | Nov 24 |
| 28°F | Oct 31 | Nov 16 | Dec 6 |
| 24°F | Nov 9 | Nov 30 | Dec 25 |
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 | 182 days | 203 days | 227 days |
| 32°F | 202 days | 225 days | 249 days |
| 28°F | 224 days | 250 days | 276 days |
| 24°F | 249 days | 279 days | 314 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 |
|---|---|---|---|
| 75559 | 8b | 15 to 20°F | 4 km |
| 75570 | 8b | 15 to 20°F | 17 km |
| 75574 | 8b | 15 to 20°F | 18 km |
| 75554 | 8a | 10 to 15°F | 19 km |
| 75568 | 8b | 15 to 20°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 USC00412352, at 33.4797, -94.6175, elevation 104 m (341 ft).
- Data quality: Representative (10+ years), 14 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
- Clarksville 2ne (45 km)
- Wright Patman Dm & Lake (47 km)
- Mount Pleasant (50 km)
- Texarkana (50 km)
- Atlanta (58 km)
- Daingerfield 9 S (63 km)
- Mount Vernon (65 km)
- Jefferson (83 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.