Last frost date in Mundelein, Illinois
April 29
Average last frost in spring. In an early year (1 in 10) it's over by April 14; in a late year (1 in 10) it comes after May 15.
October 20
Average first frost in fall. 1 year in 10 it comes by October 4.
Source: NOAA U.S. Climate Normals 1991–2020, station Mundelein 4 Wsw (USC00115961), 3.4 miles from Mundelein, elevation 840 ft. NOAA National Centers for Environmental Information. These are long-term averages, not a forecast.
This station is also the nearest one for Grayslake, Lake Zurich, Libertyville, Round Lake, Vernon Hills and Wauconda, so their frost dates are the same as Mundelein's.
| Early year | Average | Late year | |
|---|---|---|---|
| Last frost in spring | Apr 14 | Apr 29 | May 15 |
| First frost in fall | Oct 4 | Oct 20 | Nov 1 |
Frost-free days in an average year: 172
| Chance in a year | Average last in spring | Average first in fall | |
|---|---|---|---|
| Light frost (36°F) | Every year | May 10 | Oct 9 |
| Frost (32°F) | Every year | Apr 29 | Oct 20 |
| Hard freeze (28°F) | Every year | Apr 16 | Oct 31 |
Nights at 32°F or colder in an average year: 140
What to plant now in Mundelein
- Spring planting calendar for an average last frost around April 30 Mundelein: April 29
- Fall planting calendar for an average first frost around October 20 Mundelein: October 20
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
- Round Lake Beach 8 mi · last frost Apr 24
- Waukegan 10 mi · last frost Apr 30
- Palatine 11 mi · last frost Apr 25
- Arlington Heights 12 mi · last frost Apr 19
- Antioch 14 mi · last frost Apr 23