Last frost date in Rantoul, Illinois
April 21
Average last frost in spring. In an early year (1 in 10) it's over by April 7; in a late year (1 in 10) it comes after May 6.
October 18
Average first frost in fall. 1 year in 10 it comes by October 5.
Source: NOAA U.S. Climate Normals 1991–2020, station Rantoul (USW00014806), 0.8 miles from Rantoul, elevation 740 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 7 | Apr 21 | May 6 |
| First frost in fall | Oct 5 | Oct 18 | Oct 31 |
Frost-free days in an average year: 179
| Chance in a year | Average last in spring | Average first in fall | |
|---|---|---|---|
| Light frost (36°F) | Every year | Apr 30 | Oct 8 |
| Frost (32°F) | Every year | Apr 21 | Oct 18 |
| Hard freeze (28°F) | Every year | Apr 10 | Oct 29 |
Nights at 32°F or colder in an average year: 131
What to plant now in Rantoul
- Spring planting calendar for an average last frost around April 20 Rantoul: April 21
- Fall planting calendar for an average first frost around October 20 Rantoul: October 18
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
- Champaign 14 mi · last frost Apr 15
- Mahomet 15 mi · last frost Apr 23
- Danville 31 mi · last frost Apr 21
- Bloomington 45 mi · last frost Apr 25
- Pontiac 48 mi · last frost Apr 16
Updated