Portsmouth, VA Frost Dates
The last spring frost in Portsmouth usually comes around March 16 and the first fall frost around November 26.
| Spring (last) | Fall (first) | |
|---|---|---|
| Frost, 32°F | March 16 | November 26 |
| Hard freeze, 28°F | March 2 | December 12 |
Growing season: about 255 days.
Frequently asked questions
When is the last frost in Portsmouth, VA?
The median date of the last spring frost (32°F) is March 16. In half of years the last frost comes earlier and in half it comes later, so waiting a week or two past March 16 lowers the risk for tender plants.
When is the first frost in Portsmouth?
The median date of the first fall frost (32°F) is November 26, and a hard freeze (28°F) usually follows around December 12.
How long is the growing season in Portsmouth?
About 255 days between the median last spring frost and first fall frost.
NOAA NCEI U.S. Climate Normals 1991-2020, station USW00013750. Median (50% probability) dates. Low spots and valleys can frost later in spring and earlier in fall than the station.