| 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 75080 - Richardson, TX | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 32 | 37 | 44 | 52 | 61 | 69 | 72 | 72 | 65 | 54 | 43 | 35 | 53 |
| Avg Max Temp (°F) | 54 | 59 | 68 | 75 | 82 | 90 | 95 | 95 | 88 | 78 | 65 | 56 | 75 |
| Avg Precip (In.) | 2.26 | 2.59 | 3.28 | 3.62 | 5.63 | 4.03 | 2.41 | 2.2 | 3.15 | 4.56 | 3.14 | 3.02 | 39.88 |