Last frost date in Merrillville, Indiana
April 22
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 25
Average first frost in fall. 1 year in 10 it comes by October 12.
Source: NOAA U.S. Climate Normals 1991–2020, station Valparaiso Wtr Wks (USC00128999), 14.7 miles from Merrillville, elevation 800 ft. NOAA National Centers for Environmental Information. These are long-term averages, not a forecast.
This station is also the nearest one for Hobart and Valparaiso, so their frost dates are the same as Merrillville's.
| Early year | Average | Late year | |
|---|---|---|---|
| Last frost in spring | Apr 7 | Apr 22 | May 6 |
| First frost in fall | Oct 12 | Oct 25 | Nov 6 |
Frost-free days in an average year: 185
| Chance in a year | Average last in spring | Average first in fall | |
|---|---|---|---|
| Light frost (36°F) | Every year | May 4 | Oct 13 |
| Frost (32°F) | Every year | Apr 22 | Oct 25 |
| Hard freeze (28°F) | Every year | Apr 9 | Nov 5 |
Nights at 32°F or colder in an average year: 124
What to plant now in Merrillville
- Spring planting calendar for an average last frost around April 20 Merrillville: April 22
- Fall planting calendar for an average first frost around October 20 Merrillville: October 25
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
- Crown Point 5 mi · last frost Apr 29
- Gary 8 mi · last frost Apr 22
- Hammond 14 mi · last frost Apr 23
- Michigan City 28 mi · last frost Apr 19
- Plymouth 52 mi · last frost Apr 25
Updated