Somerville, MA Frost Dates
The last spring frost in Somerville usually comes around April 4 and the first fall frost around November 9.
| Spring (last) | Fall (first) | |
|---|---|---|
| Frost, 32°F | April 4 | November 9 |
| Hard freeze, 28°F | March 28 | November 21 |
Growing season: about 218 days.
Frequently asked questions
When is the last frost in Somerville, MA?
The median date of the last spring frost (32°F) is April 4. In half of years the last frost comes earlier and in half it comes later, so waiting a week or two past April 4 lowers the risk for tender plants.
When is the first frost in Somerville?
The median date of the first fall frost (32°F) is November 9, and a hard freeze (28°F) usually follows around November 21.
How long is the growing season in Somerville?
About 218 days between the median last spring frost and first fall frost.
NOAA NCEI U.S. Climate Normals 1991-2020, station USW00014739. Median (50% probability) dates. Low spots and valleys can frost later in spring and earlier in fall than the station.