New England Garden Calendar

Home / Connecticut / Bridgeport Sikorsky Mem AP

Frost dates for Bridgeport Sikorsky Mem AP, CT

NOAA weather station USW00094702 at 5 ft elevation. Based on 30 years within 1991-2020. Last verified 2026-10-17.

Last spring freeze (32°F)

Apr 5

median: freeze still happened after this date in half of years

Apr 9 30% risk · Apr 17 10% risk

First fall freeze (32°F)

Nov 6

median: a freeze had happened by this date in half of years

Oct 25 10% chance of a freeze earlier than this

Freeze-free season

216 days

median length between last spring and first fall 32°F freeze

How to read these dates

Spring: a "10% risk" date means NOAA's 1991-2020 data put the chance of a 32°F or colder night after that date at 10%. The "30% risk" date is the convention used by some popular frost calculators (the Old Farmer's Almanac says it uses a 30% probability threshold, source). Fall: a "10%" date means a 10% chance the first freeze comes before it. Source: NOAA readme.

Full table for this station

ThresholdSpring: latest-freeze date at risk of 10% / 30% / 50%Fall: first-freeze date at chance of 10% / 50%
36°F (frost possible)Apr 29 / Apr 21 / Apr 16Oct 11 / Oct 26
32°F (freeze)Apr 17 / Apr 9 / Apr 5Oct 25 / Nov 6
28°F (hard freeze)Apr 6 / Mar 31 / Mar 26Nov 6 / Nov 19

Also at 32°F, last-freeze 70% date Apr 1 and 90% date Mar 25 (frost still likely after these early dates). Data quality: Standard: 24+ years of qualifying data. Source: NOAA NCEI U.S. Climate Normals 1991-2020, station USW00094702, read 2026-10-17.

Is Memorial Day safe here?

Many New England gardeners wait for Memorial Day (it falls between May 25 and May 31). At this station, NOAA's chance of a 32°F or colder night after May 25 is under 10%, and after May 31 is under 10%. Your own spot may differ. See all stations.

Your planting schedule

Pick how cautious you want to be. The dates apply UNH Extension's per-crop rules (UNH fact sheet, read 2026-10-17) to this station's last-freeze date. UNH's sheet does not say which probability its "last frost" means, so you choose. These are planning dates, not instructions; follow your seed packet and the weather.

Last-frost reference date

Showing the schedule for the 2027 season (dates repeat yearly). Table below defaults to Typical; it updates when you choose.

CropStart seeds indoorsOutdoorsUNH Extension rule used
SpinachJan 15 – Feb 19Set out Feb 26 – Mar 19Start 4-6 wk before set-out; set out 3-6 wk before last frost.
BroccoliJan 29 – Feb 26Set out Mar 12 – Mar 26Start 4-6 wk before set-out; set out 2-4 wk before last frost.
Brussels sproutJan 29 – Feb 26Set out Mar 12 – Mar 26Start 4-6 wk before set-out; set out 2-4 wk before last frost.
CabbageJan 29 – Feb 12Set out Mar 12Start 4-6 wk before set-out; set out 4 wk before last frost.
KaleJan 29 – Feb 12Set out Mar 12Start 4-6 wk before set-out; set out 4 wk before last frost.
KohlrabiJan 29 – Feb 12Set out Mar 12Start 4-6 wk before set-out; set out 4 wk before last frost.
LeekJan 1 – Jan 15Set out Mar 12Start 8-10 wk before set-out; set out 4 wk before last frost.
LettuceFeb 5 – Feb 19Set out Mar 12 – Mar 19Start 4-5 wk before set-out; set out 3-4 wk before last frost.
OnionJan 1 – Jan 15Set out Mar 12Start 8-10 wk before set-out; set out 4 wk before last frost.
Radish—Sow Mar 12 – Mar 26Sow seed in garden 2-4 wk before last frost.
Turnip—Sow Mar 12 – Mar 26Sow seed in garden 2-4 wk before last frost.
ParsleyJan 8 – Jan 22Set out Mar 19 – Mar 26Start 9-10 wk before set-out; set out 2-3 wk before last frost.
CauliflowerFeb 12 – Feb 26Set out Mar 26Start 4-6 wk before set-out; set out 2 wk before last frost.
Potato—Sow Mar 26 – Apr 2Plant seed potatoes 1-2 wk before last frost.
Swiss chardFeb 12 – Feb 26Set out Mar 26; or sow Mar 12Start 4-6 wk before set-out; set out 2 wk before last frost; or sow seed 4 wk before last frost.
Bean—Sow on/after Apr 9Sow seed in garden after last frost.
CeleryJan 15 – Jan 29Set out on/after Apr 9Start 10-12 wk before set-out; set out after last frost.
Parsnip—Sow on/after Apr 9Sow seed in garden after last frost.
CucumberMar 19 – Apr 2Set out Apr 16 – Apr 23
Direct sow when soil reaches 70°F		Start 3-4 wk before set-out; set out 1-2 wk after last frost; or sow when soil warms to 70°F.
Sweet potato—Plant slips Apr 16 – Apr 23Plant slips (young plants) 1-2 wk after last frost.
TomatoFeb 19 – Mar 12Set out Apr 16 – Apr 23Start 6-8 wk before set-out; set out 1-2 wk after last frost.
BasilFeb 26 – Mar 12Set out Apr 23Start 6-8 wk before set-out; set out 2 wk after last frost.
EggplantFeb 12 – Mar 5Set out Apr 23 – Apr 30Start 8-10 wk before set-out; set out 2-3 wk after last frost.
MelonMar 26 – Apr 2Set out Apr 23Start 3-4 wk before set-out; set out 2 wk after last frost.
PepperFeb 12 – Feb 26Set out Apr 23Start 8-10 wk before set-out; set out 2 wk after last frost.
PumpkinMar 26 – Apr 2Set out Apr 23
Direct sow when soil reaches 70°F		Start 3-4 wk before set-out; set out 2 wk after last frost; or sow when soil warms to 70°F.
Summer squashMar 26 – Apr 2Set out Apr 23
Direct sow when soil reaches 70°F		Start 3-4 wk before set-out; set out 2 wk after last frost; or sow when soil warms to 70°F.
Winter squashMar 26 – Apr 2Set out Apr 23
Direct sow when soil reaches 70°F		Start 3-4 wk before set-out; set out 2 wk after last frost; or sow when soil warms to 70°F.
ZucchiniMar 26 – Apr 2Set out Apr 23
Direct sow when soil reaches 70°F		Start 3-4 wk before set-out; set out 2 wk after last frost; or sow when soil warms to 70°F.
Rutabaga—Sow Jun 15 – Jul 15Sow seed in garden mid-June to mid-July (fixed dates, not tied to frost).
Beet—Sow when soil reaches 45°F (use a soil thermometer)Sow seed in garden when soil warms to 45°F.
Carrot—Sow when soil reaches 60°F (use a soil thermometer)Sow seed in garden when soil warms to 60°F.
Corn—Sow when soil reaches 60°F (use a soil thermometer)Sow seed in garden when soil warms to 60°F.
Pea—Sow as soon as soil thawsSow seed in garden as soon as soil thaws.

Fall: when the garden ends

At this station the median first 32°F freeze is Nov 6; there is a 10% chance of one before Oct 25. Tender crops (tomatoes, peppers, basil) can be damaged at 33-36°F (Almanac.com notes some plants are damaged in that range); the 36°F first-frost date here is median Oct 26 and 10% date Oct 11. UNH Extension notes many fall vegetables tolerate mild frosts down to about 28°F (median first 28°F here: Nov 19), and that row covers can extend the season. UNH: Fall vegetable gardening, read 2026-10-17.

Your garden is not the weather station

This station sits at 5 ft. UNH Extension says first-freeze dates vary "even between relatively close locations, based on factors such as elevation" (source), and notes that gardeners who keep garden journals can use their own records. Gardeners on Reddit describe the same thing: elevation and cold spots change when they can plant (for example r/vermont). Treat these dates as a starting point.

Nearby stations