| 2023 Hardiness Zone: | Zone 10a: 30°F to 35°F | |
| 2012 Hardiness Zone: | Zone 9b: 25°F to 30°F | |
| 1990 Hardiness Zone: | Zone 9b: 25F to 30F | |
| Average First Frost Date: | Jan. 21 - Jan. 31 | |
| Average Last Frost Date: | Jan. 21 - Jan. 31 | |
| Koppen-Geiger Climate Zone: | BSh - Hot Semi-Arid Climate | |
| Ecoregion: | 34e - Lower Rio Grande Valley | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 181 - 210 days Over 86°F |
Annual Climate Data for ZIP Code 78574 - Mission, TX | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 47 | 50 | 57 | 63 | 70 | 73 | 74 | 74 | 71 | 64 | 56 | 49 | 62 |
| Avg Max Temp (°F) | 69 | 73 | 81 | 86 | 90 | 94 | 97 | 97 | 93 | 86 | 78 | 70 | 85 |
| Avg Precip (In.) | 1.13 | 1.28 | .86 | 1.25 | 2.68 | 2.93 | 1.66 | 2.17 | 3.7 | 2.82 | .93 | 1.07 | 22.48 |