Frost dates for Waco Dam, TX
At Waco Dam, the median last spring frost (32°F) is Mar 9 and the median first fall frost is Nov 20, for a typical growing season of 256 days. For a 90% chance that the last frost has passed, wait until Apr 4. Nearby ZIP codes are in USDA hardiness zone 8b.
- Mar 9Last spring frost (median)50% chance of 32°F after this date
- Apr 4Safer planting date10% chance of 32°F after this date
- Nov 20First fall frost (median)50% chance of 32°F by this date
- 256 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 2 | Mar 24 | Apr 13 |
| 32°F | Feb 17 | Mar 9 | Apr 4 |
| 28°F | Jan 27 | Feb 25 | Mar 21 |
| 24°F | Jan 4 | Feb 4 | Mar 6 |
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 26 | Nov 10 | Nov 27 |
| 32°F | Nov 2 | Nov 20 | Dec 9 |
| 28°F | Nov 12 | Dec 3 | Jan 1 |
| 24°F | Nov 26 | Dec 21 | Jan 23 |
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 | 204 days | 231 days | 259 days |
| 32°F | 224 days | 256 days | 284 days |
| 28°F | 250 days | 282 days | 321 days |
| 24°F | 281 days | 320 days | 354 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 100% |
| 24°F | 95% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 76710 | 8b | 15 to 20°F | 7 km |
| 76707 | 8b | 15 to 20°F | 8 km |
| 76701 | 8b | 15 to 20°F | 9 km |
| 76704 | 8b | 15 to 20°F | 9 km |
| 76712 | 8b | 15 to 20°F | 9 km |
| 76711 | 8b | 15 to 20°F | 11 km |
| 76705 | 8b | 15 to 20°F | 13 km |
| 76643 | 8b | 15 to 20°F | 17 km |
| 76706 | 8b | 15 to 20°F | 20 km |
| 76624 | 8b | 15 to 20°F | 26 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 USC00419417, at 31.6003, -97.2169, elevation 151 m (495 ft).
- Data quality: Representative (10+ years), 20 years of freeze data.
- Average days per year at or below 32°F: 38.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Waco Regional Airport (2 km)
- McGregor (25 km)
- Whitney Dam (33 km)
- Marlin (46 km)
- Hillsboro (47 km)
- Gatesville (50 km)
- Navarro Mills Dam (64 km)
- Stillhouse Hollow Dam (69 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.