Phoenix, Arizona frost dates
Frost is uncommon in Phoenix. NOAA's 1991–2020 normals give a 50% chance of a 32°F freeze after January 5 and before January 3. In practice that means a freeze in roughly half of winters or fewer, usually on just a night or two, so dates are a poor guide here. Gardeners here plan around heat and the cool season, not frost.
Frost risk by date
| Chance of frost | Spring: frost after | Fall: frost before |
|---|---|---|
| 90% | December 19 | January 21 |
| 70% | December 31 | January 9 |
| 50% | January 5 | January 3 |
| 30% | January 9 | December 30 |
| 10% | January 22 | December 18 |
Read the spring column like this: there is a 10% chance of a 32°F freeze after January 22. These are NOAA probabilities for the Phoenix Sky Harbor International Airport weather station (USW00023183, elevation 337 m), 1991–2020.
Nearby cities
| City | Last frost (50%) | First frost (50%) | Distance |
|---|---|---|---|
| Tucson, AZ | Feb 5 | Dec 9 | ~174 km |
| Flagstaff, AZ | Jun 4 | Sep 28 | ~193 km |
| Las Vegas, NV | Jan 20 | Dec 15 | ~414 km |
| San Diego, CA | – | – | ~486 km |
| Albuquerque, NM | Apr 6 | Nov 3 | ~530 km |
| El Paso, TX | Mar 2 | Nov 20 | ~551 km |
More: all Arizona frost dates