| 2023 Hardiness Zone: | Zone 8b: 15°F to 20°F |
| 2012 Hardiness Zone: | Zone 8a: 10°F to 15°F |
| 1990 Hardiness Zone: | Zone 8a: 10F to 15F |
| 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 75075 - Plano, TX | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 32 | 37 | 44 | 52 | 61 | 68 | 72 | 71 | 65 | 54 | 43 | 35 | 53 |
| Avg Max Temp (°F) | 53 | 59 | 67 | 75 | 82 | 90 | 95 | 95 | 87 | 78 | 65 | 56 | 75 |
| Avg Precip (In.) | 2.23 | 2.59 | 3.28 | 3.59 | 5.6 | 3.99 | 2.39 | 2.2 | 3.17 | 4.55 | 3.13 | 3 | 39.71 |