Tucson, AZ Frost Dates
The last spring frost in Tucson usually comes around February 5 and the first fall frost around December 9.
| Spring (last) | Fall (first) | |
|---|---|---|
| Frost, 32°F | February 5 | December 9 |
| Hard freeze, 28°F | January 11 | December 26 |
Growing season: about 307 days.
Frequently asked questions
When is the last frost in Tucson, AZ?
The median date of the last spring frost (32°F) is February 5. In half of years the last frost comes earlier and in half it comes later, so waiting a week or two past February 5 lowers the risk for tender plants.
When is the first frost in Tucson?
The median date of the first fall frost (32°F) is December 9, and a hard freeze (28°F) usually follows around December 26.
How long is the growing season in Tucson?
About 307 days between the median last spring frost and first fall frost.
NOAA NCEI U.S. Climate Normals 1991-2020, station USW00023160. Median (50% probability) dates. Low spots and valleys can frost later in spring and earlier in fall than the station.