Last frost date in Jacksonville, Illinois
April 17
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 1.
October 21
Average first frost in fall. 1 year in 10 it comes by October 9.
Source: NOAA U.S. Climate Normals 1991–2020, station Jacksonville 2 (USC00114447), 1.1 miles from Jacksonville, elevation 626 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 3 | Apr 17 | May 1 |
| First frost in fall | Oct 9 | Oct 21 | Nov 1 |
Frost-free days in an average year: 186
| Chance in a year | Average last in spring | Average first in fall | |
|---|---|---|---|
| Light frost (36°F) | Every year | Apr 27 | Oct 12 |
| Frost (32°F) | Every year | Apr 17 | Oct 21 |
| Hard freeze (28°F) | Every year | Apr 6 | Oct 31 |
Nights at 32°F or colder in an average year: 122
What to plant now in Jacksonville
- Spring planting calendar for an average last frost around April 20 Jacksonville: April 17
- Fall planting calendar for an average first frost around October 20 Jacksonville: October 21
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
- Springfield 32 mi · last frost Apr 15
- Taylorville 50 mi · last frost Apr 12
- Lincoln 54 mi · last frost Apr 20
- Macomb 56 mi · last frost Apr 17
- Canton 59 mi · last frost Apr 17
Updated