Last frost date in Zionsville, Indiana
April 21
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 20
Average first frost in fall. 1 year in 10 it comes by October 5.
Source: NOAA U.S. Climate Normals 1991–2020, station Whitestown (USC00129557), 1.7 miles from Zionsville, elevation 941 ft. NOAA National Centers for Environmental Information. These are long-term averages, not a forecast.
This station is also the nearest one for Lebanon and Whitestown, so their frost dates are the same as Zionsville's.
| Early year | Average | Late year | |
|---|---|---|---|
| Last frost in spring | Apr 6 | Apr 21 | May 6 |
| First frost in fall | Oct 5 | Oct 20 | Nov 1 |
Frost-free days in an average year: 180
| Chance in a year | Average last in spring | Average first in fall | |
|---|---|---|---|
| Light frost (36°F) | Every year | May 1 | Oct 8 |
| Frost (32°F) | Every year | Apr 21 | Oct 20 |
| Hard freeze (28°F) | Every year | Apr 9 | Oct 31 |
Nights at 32°F or colder in an average year: 114
What to plant now in Zionsville
- Spring planting calendar for an average last frost around April 20 Zionsville: April 21
- Fall planting calendar for an average first frost around October 20 Zionsville: 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 Indiana
- Brownsburg 11 mi · last frost Apr 12
- Indianapolis 18 mi · last frost Apr 20
- Fishers 19 mi · last frost Apr 21
- Lawrence 20 mi · last frost Apr 18
- Plainfield 21 mi · last frost Apr 12