New Haven, CT Frost Dates
The last spring frost in New Haven usually comes around April 17 and the first fall frost around October 27.
| Spring (last) | Fall (first) | |
|---|---|---|
| Frost, 32°F | April 17 | October 27 |
| Hard freeze, 28°F | April 4 | November 6 |
Growing season: about 193 days.
Frequently asked questions
When is the last frost in New Haven, CT?
The median date of the last spring frost (32°F) is April 17. In half of years the last frost comes earlier and in half it comes later, so waiting a week or two past April 17 lowers the risk for tender plants.
When is the first frost in New Haven?
The median date of the first fall frost (32°F) is October 27, and a hard freeze (28°F) usually follows around November 6.
How long is the growing season in New Haven?
About 193 days between the median last spring frost and first fall frost.
NOAA NCEI U.S. Climate Normals 1991-2020, station USW00014758. Median (50% probability) dates. Low spots and valleys can frost later in spring and earlier in fall than the station.