Last frost date in Pontiac, Illinois
April 16
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 2.
October 24
Average first frost in fall. 1 year in 10 it comes by October 12.
Source: NOAA U.S. Climate Normals 1991–2020, station Pontiac (USC00116910), 0.8 miles from Pontiac, elevation 650 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 16 | May 2 |
| First frost in fall | Oct 12 | Oct 24 | Nov 5 |
Frost-free days in an average year: 191
| Chance in a year | Average last in spring | Average first in fall | |
|---|---|---|---|
| Light frost (36°F) | Every year | Apr 26 | Oct 15 |
| Frost (32°F) | Every year | Apr 16 | Oct 24 |
| Hard freeze (28°F) | Every year | Apr 4 | Nov 3 |
Nights at 32°F or colder in an average year: 122
What to plant now in Pontiac
- Spring planting calendar for an average last frost around April 20 Pontiac: April 16
- Fall planting calendar for an average first frost around October 20 Pontiac: October 24
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
- Streator 19 mi · last frost Apr 12
- Bloomington 33 mi · last frost Apr 25
- Ottawa 33 mi · last frost Apr 27
- Morris 36 mi · last frost Apr 20
- Channahon 42 mi · last frost Apr 16
Updated