Frost dates for McKinney Municipal Airport, TX
At McKinney Municipal Airport, the median last spring frost (32°F) is Mar 17 and the median first fall frost is Nov 15, for a typical growing season of 241 days. For a 90% chance that the last frost has passed, wait until Apr 5. Nearby ZIP codes are in USDA hardiness zones 8a to 8b.
- Mar 17Last spring frost (median)50% chance of 32°F after this date
- Apr 5Safer planting date10% chance of 32°F after this date
- Nov 15First fall frost (median)50% chance of 32°F by this date
- 241 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 9 | Mar 31 | Apr 19 |
| 32°F | Feb 27 | Mar 17 | Apr 5 |
| 28°F | Feb 15 | Mar 4 | Mar 24 |
| 24°F | Jan 26 | Feb 24 | Mar 13 |
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 20 | Nov 3 | Nov 24 |
| 32°F | Oct 27 | Nov 15 | Dec 5 |
| 28°F | Nov 6 | Nov 30 | Dec 23 |
| 24°F | Nov 22 | Dec 18 | Jan 16 |
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 | 194 days | 217 days | 243 days |
| 32°F | 213 days | 241 days | 268 days |
| 28°F | 235 days | 266 days | 296 days |
| 24°F | 262 days | 297 days | 326 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 100% |
| 24°F | 99% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 75071 | 8b | 15 to 20°F | 7 km |
| 75072 | 8b | 15 to 20°F | 10 km |
| 75454 | 8b | 15 to 20°F | 11 km |
| 75409 | 8b | 15 to 20°F | 20 km |
| 75078 | 8b | 15 to 20°F | 21 km |
| 75009 | 8b | 15 to 20°F | 22 km |
| 75424 | 8b | 15 to 20°F | 23 km |
| 75495 | 8a | 10 to 15°F | 28 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 USC00415766, at 33.1903, -96.5914, elevation 179 m (586 ft).
- Data quality: Representative (10+ years), 11 years of freeze data.
- Average days per year at or below 32°F: 45.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- McKinney Muni Airport (1 km)
- Lavon Dam (20 km)
- Richardson (26 km)
- Pilot Point Isl Du Boi (44 km)
- Dallas Love Field (45 km)
- Greenville Kgvl Radio (46 km)
- Denton 2 SE (48 km)
- Grapevine Dam (51 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.