| 2023 Hardiness Zone: | Zone 9b: 25°F to 30°F 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: | 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 85268 - Fountain Hills, AZ | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 39 | 42 | 46 | 50 | 59 | 67 | 75 | 74 | 68 | 58 | 45 | 39 | 55 |
| Avg Max Temp (°F) | 65 | 69 | 74 | 82 | 91 | 101 | 103 | 102 | 97 | 86 | 73 | 65 | 84 |
| Avg Precip (In.) | 1.56 | 1.57 | 1.81 | .47 | .29 | .13 | 1.14 | 1.54 | 1.15 | 1.2 | 1.14 | 1.36 | 13.35 |