Joliet, IL Frost Dates
The last spring frost in Joliet usually comes around April 19 and the first fall frost around October 25.
| Spring (last) | Fall (first) | |
|---|---|---|
| Frost, 32°F | April 19 | October 25 |
| Hard freeze, 28°F | April 5 | November 4 |
Growing season: about 188 days.
Frequently asked questions
When is the last frost in Joliet, IL?
The median date of the last spring frost (32°F) is April 19. In half of years the last frost comes earlier and in half it comes later, so waiting a week or two past April 19 lowers the risk for tender plants.
When is the first frost in Joliet?
The median date of the first fall frost (32°F) is October 25, and a hard freeze (28°F) usually follows around November 4.
How long is the growing season in Joliet?
About 188 days between the median last spring frost and first fall frost.
NOAA NCEI U.S. Climate Normals 1991-2020, station USC00114530. Median (50% probability) dates. Low spots and valleys can frost later in spring and earlier in fall than the station.