Last frost date in Morris, Illinois
April 20
Average last frost in spring. In an early year (1 in 10) it's over by April 6; in a late year (1 in 10) it comes after May 6.
October 23
Average first frost in fall. 1 year in 10 it comes by October 9.
Source: NOAA U.S. Climate Normals 1991–2020, station Morris 1 NW (USC00115825), 0.8 miles from Morris, elevation 524 ft. NOAA National Centers for Environmental Information. These are long-term averages, not a forecast.
| Early year | Average | Late year | |
|---|---|---|---|
| Last frost in spring | Apr 6 | Apr 20 | May 6 |
| First frost in fall | Oct 9 | Oct 23 | Nov 3 |
Frost-free days in an average year: 184
| Chance in a year | Average last in spring | Average first in fall | |
|---|---|---|---|
| Light frost (36°F) | Every year | Apr 30 | Oct 12 |
| Frost (32°F) | Every year | Apr 20 | Oct 23 |
| Hard freeze (28°F) | Every year | Apr 8 | Nov 1 |
Nights at 32°F or colder in an average year: 127
What to plant now in Morris
- Spring planting calendar for an average last frost around April 20 Morris: April 20
- Fall planting calendar for an average first frost around October 20 Morris: October 23
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
- Joliet 17 mi · last frost Apr 19
- Yorkville 19 mi · last frost Apr 28
- Ottawa 21 mi · last frost Apr 27
- Bolingbrook 27 mi · last frost Apr 20
Updated