Last frost date in Portsmouth, Ohio
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 5.
October 25
Average first frost in fall. 1 year in 10 it comes by October 11.
Source: NOAA U.S. Climate Normals 1991–2020, station Portsmouth-sciotoville (USC00336781), 3.4 miles from Portsmouth, elevation 540 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 5 |
| First frost in fall | Oct 11 | Oct 25 | Nov 6 |
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 30 | Oct 15 |
| Frost (32°F) | Every year | Apr 17 | Oct 25 |
| Hard freeze (28°F) | Every year | Apr 4 | Nov 4 |
Nights at 32°F or colder in an average year: 106
What to plant now in Portsmouth
- Spring planting calendar for an average last frost around April 20 Portsmouth: April 17
- Fall planting calendar for an average first frost around October 20 Portsmouth: 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 Ohio
- Ironton 21 mi · last frost Apr 22
- Chillicothe 41 mi · last frost Apr 20
- Circleville 59 mi · last frost Apr 17
- Washington Court House 60 mi · last frost Apr 23
- Athens 60 mi · last frost Apr 25
Updated