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Frost dates for New Haven, Connecticut

In a typical year, New Haven’s last spring frost lands around Apr 17 and the first fall frost around Oct 27, a growing season of about 193 days. These are odds drawn from 30-year NOAA climate normals, not a promise. USDA zone 7a.

Right now the growing season is open, with about 2 days until the typical first fall frost.

Last spring frost and first fall frost odds for New Haven, Connecticut
OddsLast spring frostFirst fall frost
10 percentApr 2Oct 11
50 percentApr 17Oct 27
90 percentMay 1Nov 8

A 10 percent year is an early year, a 90 percent year a late one. Frost-sensitive planting usually waits for the 90 percent side of the last-frost band.

Soil in New Haven is typically around 53°F at 4 inches this time of year, estimated from the last two weeks of normal air temperatures.

See what is plantable in your ZIP with the what-to-plant lookup.

Common questions

When is the last frost in New Haven, Connecticut?

New Haven’s last spring frost falls around April 17 in a typical year. One year in ten it is done by April 2, and one year in ten frost holds on until May 1. Frost-sensitive planting usually waits for the late side of that band.

When is the first fall frost in New Haven?

The first fall frost arrives around October 27 in a typical year, as early as October 11 in an early year and as late as November 8 in a late one.

How long is the growing season in New Haven?

About 193 days, counted between the typical last spring frost and the typical first fall frost.

What USDA zone is New Haven in?

New Haven is in USDA hardiness zone 7a under the 2023 USDA Plant Hardiness Zone Map.

Dates come from 30-year NOAA climate normals for the nearest reporting station. They describe odds, not a forecast.

Nearby cities

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