| 2023 Hardiness Zone: | Zone 8b: 15°F to 20°F |
| 2012 Hardiness Zone: | Zone 8b: 15°F to 20°F Zone 8a: 10°F to 15°F |
| 1990 Hardiness Zone: | Zone 8a: 10F to 15F |
| 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: | 35a - Tertiary Uplands |
| Heat Zone Days: | 91 - 120 days Over 86°F |
Annual Climate Data for ZIP Code 75670 - Marshall, TX | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 33 | 37 | 45 | 51 | 60 | 68 | 71 | 70 | 64 | 52 | 43 | 36 | 53 |
| Avg Max Temp (°F) | 54 | 60 | 68 | 75 | 82 | 88 | 93 | 93 | 87 | 77 | 65 | 57 | 75 |
| Avg Precip (In.) | 4.38 | 4.05 | 4.3 | 4.27 | 4.9 | 5.14 | 3 | 2.64 | 3.77 | 4.57 | 4.71 | 4.88 | 50.6 |