San Tan Valley, AZ Frost Dates
The last spring frost in San Tan Valley usually comes around January 30 and the first fall frost around December 12.
| Spring (last) | Fall (first) | |
|---|---|---|
| Frost, 32°F | January 30 | December 12 |
| Hard freeze, 28°F | January 8 | December 26 |
Growing season: about 319 days.
Frequently asked questions
When is the last frost in San Tan Valley, AZ?
The median date of the last spring frost (32°F) is January 30. In half of years the last frost comes earlier and in half it comes later, so waiting a week or two past January 30 lowers the risk for tender plants.
When is the first frost in San Tan Valley?
The median date of the first fall frost (32°F) is December 12, and a hard freeze (28°F) usually follows around December 26.
How long is the growing season in San Tan Valley?
About 319 days between the median last spring frost and first fall frost.
NOAA NCEI U.S. Climate Normals 1991-2020, station USC00023027. Median (50% probability) dates. Low spots and valleys can frost later in spring and earlier in fall than the station.
San Tan Valley weather by month · Frost dates for every city