| 2023 Hardiness Zone: | Zone 8a: 10°F to 15°F |
| 2012 Hardiness Zone: | Zone 8a: 10°F to 15°F Zone 7b: 5°F to 10°F |
| 1990 Hardiness Zone: | Zone 7b: 5F to 10F |
| Average First Frost Date: | Nov. 11 - Nov. 20 |
| Average Last Frost Date: | Apr. 1 - Apr. 10 |
| Koppen-Geiger Climate Zone: | Cfa - Humid Subtropical Climate |
| Ecoregion: | 27i - Broken Red Plains |
| Heat Zone Days: | 121 - 150 days Over 86°F |
Annual Climate Data for ZIP Code 76374 - Olney, TX | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 30 | 34 | 42 | 50 | 59 | 68 | 72 | 71 | 64 | 53 | 41 | 32 | 51 |
| Avg Max Temp (°F) | 56 | 62 | 70 | 78 | 85 | 92 | 97 | 96 | 89 | 79 | 66 | 58 | 77 |
| Avg Precip (In.) | 1.17 | 1.65 | 2.08 | 2.49 | 4.9 | 3.5 | 1.88 | 2.32 | 3.14 | 3.13 | 1.73 | 1.64 | 29.63 |