Frost dates for Bridgeport Sikorsky Mem Airport, Connecticut
Half of years have their last spring frost by April 5, but 1 year in 10 still frosts after April 17.
A frost date is really a percentile from 30 years of records at a nearby weather station: in about half of years a frost still comes after the median date. Both numbers are below, so you can choose the risk yourself.
The odds
Last spring frost
How often a frost still comes on or after each date.
- 1 year in 10
- April 17
- 1 year in 5
- April 13
- 3 years in 10
- April 9
- 2 years in 5
- April 7
- Half of years (the median)
- April 5
First fall freeze
How often the first freeze comes on or before each date.
- 1 year in 10
- October 25
- 1 year in 5
- October 30
- 3 years in 10
- November 1
- 2 years in 5
- November 4
- Half of years (the median)
- November 6
- Growing season
- about 216 days
- Hardiness zones nearby
- 6b, 7a
- Summer days
- a usual high of about 27 °C81 °F
- Lettuce and spinach run to seed
- June to September, in hot, long days (how we know)
Summer and rain
A growing garden needs about 25 mm1 in of water a week, rain and watering together. Here is what a normal month brings.
Month by month
- January
- high ~4 °C38 °F · low ~-4 °C24 °F · rain ~81 mm3.2 in
- February
- high ~5 °C40 °F · low ~-4 °C26 °F · rain ~79 mm3.1 in
- March
- high ~9 °C47 °F · low ~0 °C32 °F · rain ~104 mm4.1 in
- April
- high ~15 °C58 °F · low ~5 °C42 °F · rain ~106 mm4.2 in
- May
- high ~20 °C68 °F · low ~11 °C52 °F · rain ~91 mm3.6 in
- June
- high ~25 °C78 °F · low ~16 °C62 °F · rain ~96 mm3.8 in
- July
- high ~29 °C83 °F · low ~20 °C68 °F · rain ~84 mm3.3 in
- August
- high ~28 °C82 °F · low ~19 °C67 °F · rain ~101 mm4 in
- September
- high ~24 °C75 °F · low ~15 °C60 °F · rain ~101 mm4 in
- October
- high ~18 °C64 °F · low ~9 °C48 °F · rain ~98 mm3.8 in
- November
- high ~12 °C54 °F · low ~4 °C38 °F · rain ~79 mm3.1 in
- December
- high ~7 °C44 °F · low ~-1 °C30 °F · rain ~101 mm4 in
Where these numbers come from
NOAA NCEI 1991–2020 Climate Normals, the Bridgeport Sikorsky Mem Airport station (listed by NOAA as Bridgeport Sikorsky Mem Ap, USW00094702), at 41.16, -73.13. These are that station’s own records, unshifted. The further your garden is from it, the less exactly they describe your ground. The planner finds the nearest station to your garden and lowers its confidence with distance, so no number is presented as if it were measured in your garden.
Cold air also pools in low ground on the clear, still nights when frost happens, so a hollow can freeze while a slope a few hundred feet away does not. No table can know that about your garden. A few seasons of your own logged frosts can.
ZIP codes nearest this station
06460, 06461, 06604, 06605, 06606, 06607, 06608, 06610, 06612, 06614, 06615, 06824…
+2 moreShow fewer
06825, 06890.
Nearby stations
The nearest stations and how their last-frost dates compare. Together they show how frost varies across your area.
- New Haven Tweed Airport, CT, last frost by April 17
- Islip Li Macarthur Airport, NY, last frost by April 10
- Shirley Brookhaven Airport, NY, last frost by April 18
- Meriden Markham Municipal Airport, CT, last frost by April 26
- Yorktown Heights 1 W, NY, last frost by April 25
- Dobbs Ferry-Ardsley, NY, last frost by April 20
Other stations in Connecticut.
- Hartford Brainard Field, CT, last frost by April 17
- Bakersville, CT, last frost by May 8
- Storrs, CT, last frost by April 19
When do I plant? · Where the dates come from
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