When is the last frost in Connecticut?

It varies by location. Across Connecticut, average last spring frost dates range from April 5 (Bridgeport) to May 11 (Taconic). Look up your ZIP code for your local date.

Why do nearby towns have different frost dates?

Elevation, distance from large bodies of water, and whether a weather station sits in a valley, on a hill, or in a city all change how cold nights get. Each ZIP code is matched to the most representative nearby NOAA station.

Connecticut frost dates

Average last spring and first fall frost (32°F) dates for 267 cities and towns in Connecticut, from NOAA 1991-2020 climate normals. Average last frost dates range from April 5 in Bridgeport to May 11 in Taconic. Open a ZIP code for frost risk by date and a planting calendar.

Cities with several ZIP codes use the first-listed ZIP. Open a ZIP for exact local dates.
City	Avg last frost	Avg first frost	Season	ZIP codes
Abington	Apr 19	Oct 22	186 days	06230
Amston	Apr 28	Oct 13	167 days	06231
Andover	Apr 28	Oct 13	167 days	06232
Ansonia	Apr 25	Oct 17	175 days	06401
Ashford	Apr 19	Oct 22	186 days	06278
Avon	Apr 25	Oct 18	172 days	06001
Ballouville	May 1	Oct 9	161 days	06233
Baltic	Apr 28	Oct 13	167 days	06330
Bantam	May 8	Oct 5	151 days	06750
Barkhamsted	May 8	Oct 5	151 days	06063
Beacon Falls	Apr 26	Oct 16	175 days	06403
Berlin	Apr 26	Oct 16	175 days	06037
Bethany	Apr 26	Oct 16	175 days	06524
Bethel	Apr 20	Oct 20	181 days	06801
Bethlehem	May 8	Oct 5	151 days	06751
Bloomfield	Apr 21	Oct 16	177 days	06002
Bolton	Apr 19	Oct 22	186 days	06043
Botsford	Apr 20	Oct 20	181 days	06404
Bozrah	Apr 14	Oct 24	192 days	06334
Branford	Apr 17	Oct 27	193 days	06405
Bridgeport	Apr 5	Nov 6	216 days	06601, 06602, 06604, 06605 +6 more
Bridgewater	Apr 28	Oct 16	170 days	06752
Bristol	Apr 25	Oct 18	172 days	06010, 06011
Broad Brook	Apr 21	Oct 16	177 days	06016
Brookfield	Apr 20	Oct 20	181 days	06804
Brooklyn	Apr 28	Oct 13	167 days	06234
Burlington	May 8	Oct 5	151 days	06013
Canaan	May 11	Oct 4	146 days	06018
Canterbury	Apr 28	Oct 13	167 days	06331
Canton	Apr 25	Oct 18	172 days	06019
Canton Center	May 8	Oct 5	151 days	06020
Centerbrook	Apr 8	Nov 2	207 days	06409
Central Village	Apr 28	Oct 13	167 days	06332
Chaplin	Apr 28	Oct 13	167 days	06235
Cheshire	Apr 17	Oct 27	193 days	06408, 06410, 06411
Chester	Apr 26	Oct 16	175 days	06412
Clinton	Apr 17	Oct 27	193 days	06413
Cobalt	Apr 26	Oct 16	175 days	06414
Colchester	Apr 28	Oct 13	167 days	06415
Colebrook	May 3	Oct 11	161 days	06021
Collinsville	May 8	Oct 5	151 days	06022
Columbia	Apr 19	Oct 22	186 days	06237
Cornwall	May 11	Oct 4	146 days	06753
Cornwall Bridge	May 11	Oct 4	146 days	06754
Cos Cob	Apr 17	Oct 23	188 days	06807
Coventry	Apr 19	Oct 22	186 days	06238
Cromwell	Apr 26	Oct 16	175 days	06416
Danbury	Apr 20	Oct 20	181 days	06810, 06811, 06813, 06814 +2 more
Danielson	May 1	Oct 9	161 days	06239
Darien	Apr 17	Oct 23	188 days	06820
Dayville	May 1	Oct 9	161 days	06241
Deep River	Apr 26	Oct 16	175 days	06417
Derby	Apr 25	Oct 17	175 days	06418
Durham	Apr 26	Oct 16	175 days	06422
East Berlin	Apr 26	Oct 16	175 days	06023
East Canaan	May 11	Oct 4	146 days	06024
East Glastonbury	Apr 17	Oct 26	191 days	06025
East Granby	Apr 21	Oct 16	177 days	06026
East Haddam	Apr 19	Oct 22	186 days	06423
East Hampton	Apr 19	Oct 22	186 days	06424
East Hartford	Apr 17	Oct 26	191 days	06108, 06118, 06128, 06138
East Hartland	May 3	Oct 11	161 days	06027
East Killingly	Apr 25	Oct 19	176 days	06243
East Lyme	Apr 8	Nov 2	207 days	06333
East Windsor	Apr 21	Oct 16	177 days	06088
East Windsor Hill	Apr 21	Oct 16	177 days	06028
East Woodstock	May 1	Oct 9	161 days	06244
Eastford	Apr 19	Oct 22	186 days	06242
Easton	Apr 20	Oct 20	181 days	06612
Ellington	Apr 21	Oct 16	177 days	06029
Enfield	Apr 21	Oct 16	177 days	06082, 06083
Essex	Apr 8	Nov 2	207 days	06426
Fabyan	May 1	Oct 9	161 days	06245
Fairfield	Apr 5	Nov 6	216 days	06824, 06825, 06828
Falls Village	May 11	Oct 4	146 days	06031
Farmington	Apr 17	Oct 26	191 days	06030, 06032, 06034
Gales Ferry	Apr 8	Nov 2	207 days	06335
Gaylordsville	May 4	Oct 7	155 days	06755
Georgetown	May 1	Oct 14	166 days	06829
Gilman	Apr 28	Oct 13	167 days	06336
Glastonbury	Apr 17	Oct 26	191 days	06033
Goshen	May 3	Oct 11	161 days	06756
Granby	Apr 21	Oct 16	177 days	06035
Greens Farms	Apr 5	Nov 6	216 days	06838
Greenwich	Apr 17	Oct 23	188 days	06830, 06831, 06836
Grosvenor Dale	May 1	Oct 9	161 days	06246
Groton	Apr 8	Nov 2	207 days	06340, 06349
Guilford	Apr 17	Oct 27	193 days	06437
Haddam	Apr 26	Oct 16	175 days	06438
Hadlyme	Apr 14	Oct 24	192 days	06439
Hamden	Apr 17	Oct 27	193 days	06514, 06517, 06518
Hampton	Apr 30	Oct 15	167 days	06247
Hanover	Apr 28	Oct 13	167 days	06350
Hartford	Apr 17	Oct 26	191 days	06101, 06102, 06103, 06104 +32 more
Harwinton	May 8	Oct 5	151 days	06791
Hawleyville	Apr 20	Oct 20	181 days	06440
Hebron	Apr 28	Oct 13	167 days	06248
Higganum	Apr 26	Oct 16	175 days	06441
Ivoryton	Apr 8	Nov 2	207 days	06442
Jewett City	Apr 14	Oct 24	192 days	06351
Kent	May 11	Oct 4	146 days	06757
Killingworth	Apr 26	Oct 16	175 days	06419
Lakeside	May 8	Oct 5	151 days	06758
Lakeville	May 11	Oct 4	146 days	06039
Lebanon	Apr 28	Oct 13	167 days	06249
Ledyard	Apr 8	Nov 2	207 days	06339
Litchfield	May 3	Oct 11	161 days	06759
Madison	Apr 17	Oct 27	193 days	06443
Manchester	Apr 17	Oct 26	191 days	06040, 06041, 06042, 06045
Mansfield Center	Apr 28	Oct 13	167 days	06250
Mansfield Depot	Apr 28	Oct 13	167 days	06251
Marion	Apr 26	Oct 16	175 days	06444
Marlborough	Apr 19	Oct 22	186 days	06447
Mashantucket	Apr 14	Oct 24	192 days	06338
Meriden	Apr 26	Oct 16	175 days	06450, 06451
Middle Haddam	Apr 26	Oct 16	175 days	06456
Middlebury	May 8	Oct 5	151 days	06762
Middlefield	Apr 26	Oct 16	175 days	06455
Middletown	Apr 26	Oct 16	175 days	06457, 06459
Milford	Apr 5	Nov 6	216 days	06460, 06461
Milldale	Apr 26	Oct 16	175 days	06467
Monroe	Apr 20	Oct 20	181 days	06468
Montville	Apr 14	Oct 24	192 days	06353
Moodus	Apr 28	Oct 13	167 days	06469
Moosup	Apr 28	Oct 13	167 days	06354
Morris	May 8	Oct 5	151 days	06763
Mystic	Apr 8	Nov 2	207 days	06355
Naugatuck	Apr 26	Oct 16	175 days	06770
New Britain	Apr 17	Oct 26	191 days	06050, 06051, 06052, 06053
New Canaan	Apr 17	Oct 23	188 days	06840
New Fairfield	Apr 28	Oct 16	170 days	06812
New Hartford	May 8	Oct 5	151 days	06057
New Haven	Apr 17	Oct 27	193 days	06501, 06502, 06503, 06504 +24 more
New London	Apr 8	Nov 2	207 days	06320
New Milford	Apr 20	Oct 20	181 days	06776
New Preston Marble Dale	May 8	Oct 5	151 days	06777
Newington	Apr 17	Oct 26	191 days	06111, 06131
Newtown	Apr 20	Oct 20	181 days	06470
Niantic	Apr 8	Nov 2	207 days	06357
Norfolk	May 3	Oct 11	161 days	06058
North Branford	Apr 17	Oct 27	193 days	06471
North Canton	May 8	Oct 5	151 days	06059
North Franklin	Apr 28	Oct 13	167 days	06254
North Granby	Apr 28	Oct 17	171 days	06060
North Grosvenordale	May 1	Oct 9	161 days	06255
North Haven	Apr 17	Oct 27	193 days	06473
North Stonington	Apr 11	Oct 31	201 days	06359
North Westchester	Apr 28	Oct 13	167 days	06474
North Windham	Apr 28	Oct 13	167 days	06256
Northfield	May 8	Oct 5	151 days	06778
Northford	Apr 26	Oct 16	175 days	06472
Norwalk	Apr 17	Oct 23	188 days	06850, 06851, 06852, 06853 +6 more
Norwich	Apr 14	Oct 24	192 days	06360
Oakdale	Apr 14	Oct 24	192 days	06370
Oakville	Apr 25	Oct 18	172 days	06779
Old Greenwich	Apr 17	Oct 23	188 days	06870
Old Lyme	Apr 8	Nov 2	207 days	06371
Old Mystic	Apr 8	Nov 2	207 days	06372
Old Saybrook	Apr 16	Oct 28	194 days	06475
Oneco	May 1	Oct 9	161 days	06373
Orange	Apr 17	Oct 27	193 days	06477
Oxford	Apr 20	Oct 20	181 days	06478
Pawcatuck	Apr 11	Oct 31	201 days	06379
Pequabuck	Apr 25	Oct 18	172 days	06781
Pine Meadow	Apr 25	Oct 18	172 days	06061
Plainfield	Apr 28	Oct 13	167 days	06374
Plainville	Apr 26	Oct 16	175 days	06062
Plantsville	Apr 26	Oct 16	175 days	06479
Plymouth	May 8	Oct 5	151 days	06782
Pomfret	May 1	Oct 9	161 days	06258
Pomfret Center	May 1	Oct 9	161 days	06259
Poquonock	Apr 21	Oct 16	177 days	06064
Portland	Apr 26	Oct 16	175 days	06480
Preston	Apr 14	Oct 24	192 days	06365
Prospect	May 8	Oct 5	151 days	06712
Putnam	May 1	Oct 9	161 days	06260
Quaker Hill	Apr 8	Nov 2	207 days	06375
Quinebaug	May 1	Oct 9	161 days	06262
Redding	May 1	Oct 14	166 days	06896
Redding Center	Apr 20	Oct 20	181 days	06875
Redding Ridge	May 1	Oct 14	166 days	06876
Ridgefield	May 1	Oct 14	166 days	06877, 06879
Riverside	Apr 17	Oct 23	188 days	06878
Riverton	May 8	Oct 5	151 days	06065
Rockfall	Apr 26	Oct 16	175 days	06481
Rocky Hill	Apr 17	Oct 26	191 days	06067
Rogers	May 1	Oct 9	161 days	06263
Roxbury	Apr 20	Oct 20	181 days	06783
Salem	Apr 14	Oct 24	192 days	06420
Salisbury	May 11	Oct 4	146 days	06068
Sandy Hook	Apr 20	Oct 20	181 days	06482
Scotland	Apr 28	Oct 13	167 days	06264
Seymour	Apr 25	Oct 17	175 days	06483
Sharon	May 11	Oct 4	146 days	06069
Shelton	Apr 20	Oct 20	181 days	06484
Sherman	May 1	Oct 14	166 days	06784
Simsbury	Apr 21	Oct 16	177 days	06070
Somers	Apr 21	Oct 16	177 days	06071
Somersville	Apr 21	Oct 16	177 days	06072
South Britain	Apr 20	Oct 20	181 days	06487
South Glastonbury	Apr 17	Oct 26	191 days	06073
South Kent	Apr 21	Oct 25	185 days	06785
South Lyme	Apr 16	Oct 28	194 days	06376
South Willington	Apr 28	Oct 13	167 days	06265
South Windham	Apr 28	Oct 13	167 days	06266
South Windsor	Apr 17	Oct 26	191 days	06074
South Woodstock	May 1	Oct 9	161 days	06267
Southbury	Apr 20	Oct 20	181 days	06488
Southington	Apr 26	Oct 16	175 days	06489
Southport	Apr 5	Nov 6	216 days	06890
Stafford	May 7	Oct 12	159 days	06075
Stafford Springs	May 7	Oct 12	159 days	06076
Staffordville	May 7	Oct 12	159 days	06077
Stamford	Apr 17	Oct 23	188 days	06901, 06902, 06903, 06904 +13 more
Sterling	Apr 25	Oct 19	176 days	06377
Stevenson	Apr 25	Oct 17	175 days	06491
Stonington	Apr 11	Oct 31	201 days	06378
Storrs Mansfield	Apr 19	Oct 22	186 days	06268, 06269
Stratford	Apr 5	Nov 6	216 days	06614, 06615
Suffield	Apr 21	Oct 16	177 days	06078, 06080
Taconic	May 11	Oct 4	146 days	06079
Taftville	Apr 14	Oct 24	192 days	06380
Tariffville	Apr 21	Oct 16	177 days	06081
Terryville	Apr 25	Oct 18	172 days	06786
Thomaston	Apr 25	Oct 18	172 days	06787
Thompson	May 1	Oct 9	161 days	06277
Tolland	Apr 19	Oct 22	186 days	06084
Torrington	May 8	Oct 5	151 days	06790, 06792
Trumbull	Apr 5	Nov 6	216 days	06611
Uncasville	Apr 14	Oct 24	192 days	06382
Unionville	Apr 25	Oct 18	172 days	06085, 06087
Vernon Rockville	Apr 19	Oct 22	186 days	06066
Versailles	Apr 14	Oct 24	192 days	06383
Voluntown	Apr 14	Oct 24	192 days	06384
Wallingford	Apr 26	Oct 16	175 days	06492, 06493, 06494, 06495
Washington	Apr 21	Oct 25	185 days	06793
Washington Depot	May 8	Oct 5	151 days	06794
Waterbury	Apr 26	Oct 16	175 days	06701, 06702, 06703, 06704 +12 more
Waterford	Apr 16	Oct 28	194 days	06385
Watertown	May 8	Oct 5	151 days	06795
Wauregan	Apr 28	Oct 13	167 days	06387
Weatogue	Apr 21	Oct 16	177 days	06089
West Cornwall	May 3	Oct 11	161 days	06796
West Granby	May 8	Oct 5	151 days	06090
West Hartford	Apr 17	Oct 26	191 days	06107, 06110, 06117, 06119 +3 more
West Hartland	May 3	Oct 11	161 days	06091
West Haven	Apr 17	Oct 27	193 days	06516
West Mystic	Apr 16	Oct 28	194 days	06388
West Simsbury	Apr 25	Oct 18	172 days	06092
West Suffield	Apr 21	Oct 16	177 days	06093
Westbrook	Apr 16	Oct 28	194 days	06498
Weston	Apr 17	Oct 23	188 days	06883
Westport	Apr 17	Oct 23	188 days	06880, 06881, 06888, 06889
Wethersfield	Apr 17	Oct 26	191 days	06109, 06129
Willimantic	Apr 28	Oct 13	167 days	06226
Willington	May 7	Oct 12	159 days	06279
Wilton	Apr 17	Oct 23	188 days	06897
Winchester Center	May 3	Oct 11	161 days	06094
Windham	Apr 28	Oct 13	167 days	06280
Windsor	Apr 17	Oct 26	191 days	06006, 06095
Windsor Locks	Apr 21	Oct 16	177 days	06096
Winsted	May 8	Oct 5	151 days	06098
Wolcott	May 8	Oct 5	151 days	06716
Woodbury	Apr 20	Oct 20	181 days	06798
Woodstock	Apr 28	Oct 15	169 days	06281
Woodstock Valley	Apr 19	Oct 22	186 days	06282
Yantic	Apr 14	Oct 24	192 days	06389

Frequently asked questions

When is the last frost in Connecticut?: It varies by location. Across Connecticut, average last spring frost dates range from April 5 (Bridgeport) to May 11 (Taconic). Look up your ZIP code for your local date.
Why do nearby towns have different frost dates?: Elevation, distance from large bodies of water, and whether a weather station sits in a valley, on a hill, or in a city all change how cold nights get. Each ZIP code is matched to the most representative nearby NOAA station.