| 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 78504 - McAllen, TX | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 48 | 51 | 58 | 64 | 70 | 74 | 75 | 75 | 72 | 65 | 57 | 49 | 63 |
| Avg Max Temp (°F) | 69 | 73 | 81 | 85 | 89 | 94 | 96 | 96 | 92 | 86 | 78 | 71 | 84 |
| Avg Precip (In.) | 1.21 | 1.33 | .85 | 1.34 | 2.65 | 2.71 | 1.68 | 2.41 | 3.95 | 2.8 | .94 | 1.08 | 22.97 |