Last frost date in Joliet, Illinois
April 19
Average last frost in spring. In an early year (1 in 10) it's over by April 3; in a late year (1 in 10) it comes after May 7.
October 25
Average first frost in fall. 1 year in 10 it comes by October 12.
Source: NOAA U.S. Climate Normals 1991–2020, station Joliet Brandon Rd Dam (USC00114530), 2.5 miles from Joliet, elevation 543 ft. NOAA National Centers for Environmental Information. These are long-term averages, not a forecast.
This station is also the nearest one for Manhattan, New Lenox and Shorewood, so their frost dates are the same as Joliet's.
| Early year | Average | Late year | |
|---|---|---|---|
| Last frost in spring | Apr 3 | Apr 19 | May 7 |
| First frost in fall | Oct 12 | Oct 25 | Nov 6 |
Frost-free days in an average year: 188
| Chance in a year | Average last in spring | Average first in fall | |
|---|---|---|---|
| Light frost (36°F) | Every year | May 1 | Oct 15 |
| Frost (32°F) | Every year | Apr 19 | Oct 25 |
| Hard freeze (28°F) | Every year | Apr 5 | Nov 4 |
Nights at 32°F or colder in an average year: 126
What to plant now in Joliet
- Spring planting calendar for an average last frost around April 20 Joliet: April 19
- Fall planting calendar for an average first frost around October 20 Joliet: October 25
Planting dates: USDA Home and Garden Bulletin No. 9 (1967), “Suburban and Farm Vegetable Gardens,” tables 4 and 5. How we match the table.
Nearby in Illinois
- Channahon 9 mi · last frost Apr 16
- Bolingbrook 12 mi · last frost Apr 20
- Naperville 16 mi · last frost Apr 28
- Orland Park 16 mi · last frost Apr 19
- Morris 17 mi · last frost Apr 20
Updated