| 2023 Hardiness Zone: | Zone 9a: 20°F to 25°F Zone 9b: 25°F to 30°F | |
| 2012 Hardiness Zone: | Zone 9b: 25°F to 30°F Zone 10a: 30°F to 35°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: | BWh - Hot Desert Climate | |
| Ecoregion: | ||
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 181 - 210 days Over 86°F |
Annual Climate Data for ZIP Code 85388 - Surprise, AZ | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 38 | 42 | 45 | 51 | 59 | 68 | 75 | 74 | 67 | 56 | 44 | 38 | 55 |
| Avg Max Temp (°F) | 67 | 71 | 76 | 84 | 93 | 103 | 105 | 104 | 98 | 88 | 75 | 67 | 86 |
| Avg Precip (In.) | 1.22 | 1.25 | 1.18 | .29 | .13 | .06 | .75 | 1.42 | .99 | .78 | .82 | 1.05 | 9.93 |