| 2023 Hardiness Zone: | Zone 8b: 15°F to 20°F Zone 8a: 10°F to 15°F |
| 2012 Hardiness Zone: | Zone 8a: 10°F to 15°F |
| 1990 Hardiness Zone: | Zone 7b: 5F to 10F |
| Average First Frost Date: | Nov. 11 - Nov. 20 |
| Average Last Frost Date: | Mar. 21 - Mar. 31 |
| 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 75009 - Celina, TX | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 30 | 35 | 42 | 50 | 60 | 68 | 73 | 71 | 64 | 53 | 42 | 33 | 52 |
| Avg Max Temp (°F) | 52 | 58 | 67 | 75 | 82 | 90 | 95 | 95 | 87 | 77 | 64 | 55 | 75 |
| Avg Precip (In.) | 2 | 2.66 | 3.34 | 3.37 | 5.56 | 4.2 | 2.41 | 2.34 | 3.65 | 4.64 | 3.15 | 2.87 | 40.19 |