| 2023 Hardiness Zone: | Zone 9a: 20°F to 25°F | |
| 2012 Hardiness Zone: | Zone 8b: 15°F to 20°F Zone 9a: 20°F to 25°F | |
| 1990 Hardiness Zone: | Zone 8b: 15F to 20F | |
| Average First Frost Date: | Nov. 21 - Nov. 30 | |
| Average Last Frost Date: | Mar. 1 - Mar. 10 | |
| Koppen-Geiger Climate Zone: | Cfa - Humid Subtropical Climate | |
| Ecoregion: | 32b - Southern Blackland/Fayette Prairie | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 121 - 150 days Over 86°F |
Annual Climate Data for ZIP Code 77426 - Chappell Hill, TX | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 39 | 42 | 50 | 57 | 65 | 71 | 73 | 72 | 67 | 58 | 49 | 41 | 57 |
| Avg Max Temp (°F) | 61 | 66 | 73 | 80 | 86 | 92 | 96 | 96 | 91 | 82 | 71 | 64 | 80 |
| Avg Precip (In.) | 3.47 | 2.82 | 2.99 | 3.26 | 5.01 | 4.4 | 2.14 | 2.99 | 4.46 | 4.29 | 4.06 | 3.39 | 43.27 |