| 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 78950 - New Ulm, TX | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 39 | 43 | 50 | 56 | 65 | 70 | 72 | 72 | 67 | 58 | 49 | 41 | 57 |
| Avg Max Temp (°F) | 62 | 67 | 74 | 80 | 87 | 92 | 96 | 97 | 91 | 83 | 72 | 64 | 81 |
| Avg Precip (In.) | 3.38 | 2.75 | 2.82 | 3.27 | 5.33 | 4.45 | 2.27 | 2.93 | 4.19 | 4.19 | 3.84 | 3.16 | 42.58 |