First and Last Frost Dates of Connecticut with Map

  • SheelaBy
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Connecticut’s weather changes a lot across the state, which affects when plants can grow. In Bridgeport, plants can grow for 223 days, but in Torrington, it’s only 159 days. This makes a big difference for gardeners and farmers.

Big cities like Bridgeport, Hartford, and New Haven have longer growing times. But places higher up or further inland, like Torrington and Stafford, have shorter growing times. In these places, the last frost in spring can be as late as May, and the first frost in fall can come as early as October.

This guide gives frost date info for Connecticut cities and towns, showing the closest weather stations and how far away they are. This helps gardeners and farmers plan better for planting and picking their crops.

Connecticut Frost Dates Map

Please select ot type your Connecticut location in the selction box below, to find its frost dates.

Connecticut Frost Dates Map

City Name

Connecticut Frost Dates

Spring Last Frost
—
—
Fall First Frost
—
—
The nearest weather station to your location is — and is located at a distance of —.
These dates are based on NOAA Data with 30% probability derived from “U.S. Climate Normals 2020: U.S. Annual/Seasonal Climate Normals (1991-2020)”. This means there is a 30% chance that the first fall frost may occur before the shown date, and the last spring frost may occur after the shown date.

First & Last Frost Dates of Connecticut Cities and Towns

This frost date info comes from NCEI.gov’s U.S. Climate Normals 2020, using data from 1991-2020. The frost dates here have a 30% chance of happening.

When we talk about First and Last frost dates, they’re not exact but good guesses. The “Last Spring Frost Date” means it’s usually safe to plant outside after this, but there’s still a small chance (30%) of frost later.

The “First Fall Frost Date” is when frost usually starts, but it might come a bit earlier (30% chance). Use these dates as good guides for gardening – they’re usually right, but not always!

City Station ID Distance (mi) First Frost Date (Fall) Last Frost Date (Spring) Growing Season (Days)
Bridgeport USW00094702 3.47 11/01 04/09 223.0
Stamford USC00067970 4.95 10/16 04/23 196.0
New Haven USW00014758 3.72 10/20 04/22 201.0
Hartford USW00014752 2.37 10/20 04/23 199.0
Waterbury USW00054788 12.05 10/11 05/01 183.0
Norwalk USC00067970 7.27 10/16 04/23 196.0
Danbury USC00061762 1.75 10/14 04/26 189.0
New Britain USW00014752 8.43 10/20 04/23 199.0
West Hartford USW00014752 5.04 10/20 04/23 199.0
Greenwich USW00094745 5.00 10/24 04/18 208.0
Fairfield USW00094702 6.99 11/01 04/09 223.0
Bristol USC00060973 8.52 10/12 05/01 181.0
Meriden USW00054788 2.24 10/11 05/01 183.0
Hamden USC00065077 1.65 10/20 04/23 199.0
Manchester USW00014752 7.20 10/20 04/23 199.0
West Haven USW00014758 3.14 10/20 04/22 201.0
Milford USW00094702 6.03 11/01 04/09 223.0
Stratford USW00094702 1.83 11/01 04/09 223.0
East Hartford USW00014752 2.71 10/20 04/23 199.0
Middletown USW00054788 9.86 10/11 05/01 183.0
Southington USW00054788 6.53 10/11 05/01 183.0
Wallingford USW00054788 3.67 10/11 05/01 183.0
Shelton USC00060128 2.26 10/11 05/02 182.0
Enfield USW00014740 8.40 10/10 04/27 186.0
Norwich USC00065910 0.57 10/17 04/21 200.0
Groton USW00014707 2.08 10/22 04/21 201.0
Trumbull USW00094702 6.93 11/01 04/09 223.0
Torrington USC00060227 6.47 10/01 05/14 159.0
Glastonbury USW00014752 6.45 10/20 04/23 199.0
Naugatuck USC00065077 9.37 10/20 04/23 199.0
Newington USW00014752 4.59 10/20 04/23 199.0
Vernon USW00014752 10.52 10/20 04/23 199.0
Windsor USW00014740 6.24 10/10 04/27 186.0
Cheshire USW00054788 4.29 10/11 05/01 183.0
New Milford USC00061762 12.23 10/14 04/26 189.0
Branford USW00014758 3.95 10/20 04/22 201.0
Newtown USC00061762 5.89 10/14 04/26 189.0
New London USC00063207 3.22 10/27 04/14 216.0
East Haven USW00014758 1.71 10/20 04/22 201.0
Westport USC00067970 9.94 10/16 04/23 196.0
Wethersfield USW00014752 2.11 10/20 04/23 199.0
Farmington USW00014752 7.45 10/20 04/23 199.0
South Windsor USW00014740 8.39 10/10 04/27 186.0
Mansfield USC00068138 0.45 10/15 04/25 193.0
Simsbury USW00014740 7.84 10/10 04/27 186.0
Ridgefield USW00054734 6.08 10/07 05/06 175.0
North Haven USC00065077 2.53 10/20 04/23 199.0
Windham USW00054767 3.22 10/08 05/03 175.0
Watertown USC00060973 16.18 10/12 05/01 181.0
Guilford USW00014758 10.69 10/20 04/22 201.0
Darien USC00067970 5.26 10/16 04/23 196.0
Bloomfield USW00014752 7.47 10/20 04/23 199.0
New Canaan USC00067970 3.14 10/16 04/23 196.0
Rocky Hill USW00014752 5.50 10/20 04/23 199.0
Bethel USC00061762 2.05 10/14 04/26 189.0
Berlin USW00054788 8.82 10/11 05/01 183.0
Southbury USC00060128 10.98 10/11 05/02 182.0
Waterford USW00014707 5.35 10/22 04/21 201.0
Ansonia USC00060128 0.69 10/11 05/02 182.0
East Lyme USW00014707 9.51 10/22 04/21 201.0
Avon USC00060973 5.33 10/12 05/01 181.0
Monroe USC00060128 6.11 10/11 05/02 182.0
Stonington USW00014794 5.50 10/25 04/17 209.0
Wilton USC00067970 7.51 10/16 04/23 196.0
Killingly USC00069388 9.80 10/04 05/07 169.0
Montville USC00065910 6.38 10/17 04/21 200.0
Madison USW00014758 15.04 10/20 04/22 201.0
Plainville USC00060973 8.93 10/12 05/01 181.0
Brookfield USC00061762 5.72 10/14 04/26 189.0
Ellington USC00067958 11.60 10/06 05/13 167.0
Seymour USC00060128 3.43 10/11 05/02 182.0
Wolcott USW00054788 10.42 10/11 05/01 183.0
Suffield USW00014740 3.82 10/10 04/27 186.0
Colchester USW00054767 13.81 10/08 05/03 175.0
Ledyard USC00065910 6.11 10/17 04/21 200.0
Plainfield USC00063420 9.50 10/09 05/04 175.0
Tolland USC00068138 8.94 10/15 04/25 193.0
Cromwell USW00014752 9.75 10/20 04/23 199.0
Orange USC00060128 5.94 10/11 05/02 182.0
New Fairfield USC00061762 5.65 10/14 04/26 189.0
North Branford USW00014758 7.62 10/20 04/22 201.0
Clinton USC00306276 17.72 11/09 04/15 231.0
Oxford USC00060128 5.99 10/11 05/02 182.0
East Hampton USW00014752 13.48 10/20 04/23 199.0
Windsor Locks USW00014740 2.13 10/10 04/27 186.0
Derby USC00060128 1.98 10/11 05/02 182.0
Coventry USC00068138 5.75 10/15 04/25 193.0
Plymouth USC00060973 10.51 10/12 05/01 181.0
Griswold USC00065910 8.56 10/17 04/21 200.0
Stafford USC00067958 3.02 10/06 05/13 167.0
Granby USW00014740 5.57 10/10 04/27 186.0
East Windsor USW00014740 6.59 10/10 04/27 186.0
Somers USC00067958 9.57 10/06 05/13 167.0
Old Saybrook USC00306276 13.09 11/09 04/15 231.0
Weston USC00067970 10.15 10/16 04/23 196.0
Winchester USC00065445 6.71 10/06 05/09 169.0
Canton USC00060973 2.81 10/12 05/01 181.0
Woodbury USC00060128 14.81 10/11 05/02 182.0
Burlington USC00060973 2.44 10/12 05/01 181.0
Prospect USC00065077 7.62 10/20 04/23 199.0
Portland USW00054788 10.64 10/11 05/01 183.0
Thompson USC00069388 3.02 10/04 05/07 169.0
Putnam USC00069388 3.25 10/04 05/07 169.0
Hebron USW00054767 11.06 10/08 05/03 175.0
Woodbridge USC00060128 4.33 10/11 05/02 182.0
East Haddam USW00054788 18.22 10/11 05/01 183.0
Haddam USW00054788 16.49 10/11 05/01 183.0
Redding USW00054734 6.57 10/07 05/06 175.0
Brooklyn USC00063420 5.52 10/09 05/04 175.0
Woodstock USC00069388 3.65 10/04 05/07 169.0
Litchfield USC00060227 11.31 10/01 05/14 159.0
Middlebury USC00060128 12.49 10/11 05/02 182.0
Old Lyme USC00306276 13.22 11/09 04/15 231.0
Easton USC00061762 11.01 10/14 04/26 189.0
Thomaston USC00060973 11.02 10/12 05/01 181.0
Durham USW00054788 7.90 10/11 05/01 183.0
Lebanon USW00054767 7.45 10/08 05/03 175.0
Westbrook USC00306276 14.49 11/09 04/15 231.0
Essex USC00306276 16.90 11/09 04/15 231.0
New Hartford USC00060299 2.95 10/11 05/06 177.0
Killingworth USW00054788 17.20 10/11 05/01 183.0
Beacon Falls USC00060128 6.64 10/11 05/02 182.0
Marlborough USW00014752 12.23 10/20 04/23 199.0
Harwinton USC00060227 5.54 10/01 05/14 159.0
Willington USC00068138 6.16 10/15 04/25 193.0
Bethany USC00065077 4.98 10/20 04/23 199.0
Columbia USW00054767 6.66 10/08 05/03 175.0
East Granby USW00014740 2.31 10/10 04/27 186.0
North Stonington USW00014794 7.61 10/25 04/17 209.0
Canterbury USC00063420 6.38 10/09 05/04 175.0
Bolton USC00068138 10.71 10/15 04/25 193.0
Preston USC00065910 2.81 10/17 04/21 200.0
Deep River USC00306276 19.79 11/09 04/15 231.0
Salem USC00065910 11.16 10/17 04/21 200.0
Pomfret USC00069388 4.44 10/04 05/07 169.0
Middlefield USW00054788 6.01 10/11 05/01 183.0
Salisbury USC00062658 3.63 09/30 05/18 154.0
Ashford USC00068138 7.71 10/15 04/25 193.0
Lisbon USC00065910 5.78 10/17 04/21 200.0
Chester USW00054788 19.37 10/11 05/01 183.0
Washington USC00061762 16.89 10/14 04/26 189.0
Barkhamsted USC00060299 2.61 10/11 05/06 177.0
Sterling USC00063420 12.28 10/09 05/04 175.0
Sherman USC00301211 10.97 10/10 05/03 178.0
Bethlehem USC00060227 17.23 10/01 05/14 159.0
Goshen USC00065445 9.75 10/06 05/09 169.0
North Canaan USC00062658 5.57 09/30 05/18 154.0
Andover USC00068138 8.32 10/15 04/25 193.0
Kent USW00064756 14.31 10/03 05/12 164.0
Sprague USC00065910 7.24 10/17 04/21 200.0
Sharon USC00062658 7.48 09/30 05/18 154.0
Voluntown USC00065910 10.67 10/17 04/21 200.0
Bozrah USC00065910 5.59 10/17 04/21 200.0
Lyme USW00014707 16.05 10/22 04/21 201.0
Roxbury USC00061762 12.26 10/14 04/26 189.0
Morris USC00060227 14.56 10/01 05/14 159.0
Chaplin USC00063420 4.26 10/09 05/04 175.0
Hartland USC00060299 6.13 10/11 05/06 177.0
Franklin USC00065910 7.05 10/17 04/21 200.0
Hampton USC00063420 1.14 10/09 05/04 175.0
Eastford USC00063420 9.40 10/09 05/04 175.0
Bridgewater USC00061762 9.74 10/14 04/26 189.0
Norfolk USC00065445 1.63 10/06 05/09 169.0
Scotland USC00063420 4.99 10/09 05/04 175.0
Cornwall USC00062658 7.59 09/30 05/18 154.0
Colebrook USC00065445 6.56 10/06 05/09 169.0
Warren USC00062658 14.34 09/30 05/18 154.0
Canaan USC00062658 3.56 09/30 05/18 154.0
Union USC00067958 4.30 10/06 05/13 167.0

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