| 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: | No Frost | |
| Average Last Frost Date: | No Frost | |
| Koppen-Geiger Climate Zone: | BSh - Hot Semi-Arid Climate | |
| Ecoregion: | 34f - Lower Rio Grande Alluvial Floodplain | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 181 - 210 days Over 86°F |
Annual Climate Data for ZIP Code 78503 - McAllen, TX | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 48 | 51 | 58 | 64 | 71 | 74 | 75 | 75 | 72 | 65 | 57 | 50 | 63 |
| Avg Max Temp (°F) | 69 | 73 | 81 | 85 | 89 | 93 | 96 | 96 | 92 | 86 | 78 | 71 | 84 |
| Avg Precip (In.) | 1.22 | 1.33 | .84 | 1.32 | 2.64 | 2.66 | 1.66 | 2.52 | 4 | 2.76 | .93 | 1.11 | 22.97 |