| 2023 Hardiness Zone: | Zone 8b: 15°F to 20°F |
| 2012 Hardiness Zone: | Zone 8a: 10°F to 15°F |
| 1990 Hardiness Zone: | Zone 7b: 5F to 10F |
| Average First Frost Date: | Nov. 21 - Nov. 30 |
| Average Last Frost Date: | Mar. 11 - Mar. 20 |
| Koppen-Geiger Climate Zone: | Cfa - Humid Subtropical Climate |
| Ecoregion: | 32a - Northern Blackland Prairie |
| Heat Zone Days: | 91 - 120 days Over 86°F |
Annual Climate Data for ZIP Code 75071 - McKinney, TX | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 32 | 36 | 44 | 51 | 60 | 68 | 72 | 71 | 64 | 54 | 43 | 34 | 52 |
| Avg Max Temp (°F) | 54 | 60 | 67 | 75 | 82 | 89 | 95 | 94 | 87 | 78 | 65 | 56 | 75 |
| Avg Precip (In.) | 2.26 | 2.83 | 3.41 | 3.49 | 5.63 | 4.25 | 2.45 | 2.17 | 3.53 | 4.56 | 3.51 | 3.14 | 41.23 |