Data: 2023 USDA zones (PRISM/OSU) · NOAA 1991–2020 normals · updated

Planting zone for 06752 — Bridgewater, CT

ZIP code 06752 (Bridgewater, Western Connecticut County) is in USDA zone 6b: the coldest winter night averages −5 to 0 °F. The median last spring frost is April 20 and the first fall frost October 20.

Where ZIP 06752 is

Outlined: the ZIP code area · tap the map for the zone at any spot · scroll or pinch to zoom

Not the official USDA Plant Hardiness Zone Map. Zones come from the 2023 USDA hardiness-zone data by the PRISM Group, Oregon State University; we re-mapped and recolored them. The official map is at planthardiness.ars.usda.gov.

Zone6b−5 to 0 °F
Coldest night−20.6 to −17.8 °C
Last frostApr 20
First frostOct 20
2012 zone6a

Was 6a on the 2012 map — half a zone warmer now. The zone is the one at the center of the ZIP code; hilly ZIPs can span two zones. What zone 6b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Bridgewater, CT…

Forecast data: National Weather Service (api.weather.gov), public domain. This is not a warning service — for official frost and freeze warnings see weather.gov.

Frost dates in Bridgewater, CT

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostApril 20median — 50% chance of a later frost
Safe for tender plantsMay 6only 10% chance of frost after
First fall frostOctober 20median — 10% chance by Oct 5
Growing season181 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 7 and returns around November 1.

From the NOAA station Danbury, CT — 9 miles away, elevation 404 ft. NOAA NCEI U.S. Climate Normals 1991–2020, 32 °F threshold. Low spots and valleys can freeze later in spring than the station.

When to plant vegetables in 06752

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Mar 9 – Mar 23
SpinachSow outdoors · Mar 9 – Mar 30
Broccoli, cabbageStart indoors · Feb 9 – Feb 23
Broccoli, cabbageTransplant · Mar 30 – Apr 13
Onion setsPlant outdoors · Mar 23 – Apr 6
PotatoesPlant outdoors · Mar 30 – Apr 13
LettuceSow outdoors · Mar 23 – Apr 6
Carrots, beetsSow outdoors · Mar 30 – Apr 13
TomatoesStart indoors · Feb 23 – Mar 9
TomatoesTransplant · Apr 27 – May 11
Peppers, eggplantStart indoors · Feb 9 – Feb 23
Peppers, eggplantTransplant · May 4 – May 18
BeansSow outdoors · Apr 27 – May 11
Sweet cornSow outdoors · Apr 27 – May 11
Cucumbers, squashSow outdoors · Apr 27 – May 11
Fall lettuce, spinachSow outdoors · Aug 25 – Sep 8
GarlicPlant cloves · Oct 6 – Nov 10
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Apr 20) and first fall frost (Oct 20) with the rules of thumb U.S. extension services publish. Cool-season crops take a light frost; warm-season crops do best once the soil is above about 60 °F.

When spring arrived in 2026

In 2026, spring leaf-out near 06752 came on Apr 2 — 5 days earlier than the 1991–2020 average (Apr 7).

JanFebMarAprMayJun

The Spring Index marks the day when accumulated warmth is enough for lilac and honeysuckle to leaf out — a widely used signal that the growing season has started. Source: USA National Phenology Network, www.usanpn.org — Spring Indices, first leaf, 2026 (data as of 2026-09-08) and 30-year average 1991–2020 (CC BY 4.0).

Soil in Bridgewater, CT

The soil mapped at the center of ZIP 06752 is Ridgebury — moderately decomposed plant material, poorly drained.

TextureModerately decomposed plant materialtop layer
DrainagePoorly drainedconsider raised beds
Organic matter95%high
Hydrologic groupDwater soaks in very slowly
Farmland classFarmland of statewide importanceUSDA classification

Map unit: Ridgebury fine sandy loam, 0 to 3 percent slopes.

Soil Survey Staff, Natural Resources Conservation Service, USDA. Soil Survey Geographic (SSURGO) Database, via Soil Data Access, accessed 2026-10-29. The soil at the center point of ZIP 06752; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Bridgewater, CT

Summer high85 °Faverage high, July
Winter low21 °Faverage low, January
Hot days20days a year at 90 °F or more
Freezing nights126nights a year at 32 °F or less
Growing degree days3,102base 50 °F — the season’s usable heat
Longest day15 h 11 mindaylight on June 21
Shortest day9 h 10 mindaylight on December 21
Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)
Precipitation51.3 inper year, rain and melted snow

Average high and low, by month

10°20°30°40°50°60°70°80°90°100°32 °FJanuary: average high 36 °F, low 21 °F 36°21° JanFebruary: average high 39 °F, low 22 °F 39°22° FebMarch: average high 48 °F, low 29 °F 48°29° MarApril: average high 61 °F, low 39 °F 61°39° AprMay: average high 72 °F, low 49 °F 72°49° MayJune: average high 80 °F, low 59 °F 80°59° JunJuly: average high 85 °F, low 64 °F 85°64° JulAugust: average high 82 °F, low 63 °F 82°63° AugSeptember: average high 75 °F, low 55 °F 75°55° SepOctober: average high 63 °F, low 43 °F 63°43° OctNovember: average high 50 °F, low 34 °F 50°34° NovDecember: average high 40 °F, low 26 °F 40°26° Dec

Precipitation by month inches

0″1″2″3″4″5″6″January: 3.61 in precipitation 3.6 JanFebruary: 3.20 in precipitation 3.2 FebMarch: 4.40 in precipitation 4.4 MarApril: 4.19 in precipitation 4.2 AprMay: 4.38 in precipitation 4.4 MayJune: 4.14 in precipitation 4.1 JunJuly: 5.04 in precipitation 5.0 JulAugust: 4.38 in precipitation 4.4 AugSeptember: 4.13 in precipitation 4.1 SepOctober: 4.81 in precipitation 4.8 OctNovember: 3.87 in precipitation 3.9 NovDecember: 5.14 in precipitation 5.1 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Danbury, CT (9 mi away); precipitation: Brookfield 3.3 Sse, CT (6 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 6b.

067836b
Roxbury, CT · 4 mi
068046b
Brookfield, CT · 4 mi
064406b
Hawleyville, CT · 6 mi
067766b
New Milford, CT · 6 mi
064876b
South Britain, CT · 7 mi
068126b
New Fairfield, CT · 7 mi
064886b
Southbury, CT · 7 mi
067846b
Sherman, CT · 8 mi

Connecticut planting zones →

Questions about 06752

What planting zone is ZIP code 06752?

ZIP code 06752 (Bridgewater, CT) is in USDA hardiness zone 6b on the 2023 map: the coldest night of an average winter reaches −5 to 0 °F (−20.6 to −17.8 °C).

When is the last frost in Bridgewater, CT?

The median last spring frost (32 °F) near 06752 is April 20; after May 6 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Danbury station.

When is the first frost in Bridgewater, CT?

The median first fall frost near 06752 is October 20, giving a median frost-free growing season of 181 days.

When should I plant tomatoes in 06752?

Start tomato seeds indoors around Feb 23 – Mar 9 and set transplants outside around Apr 27 – May 11, one to three weeks after the median last frost.

How much rain and snow does 06752 get?

About 51.3 inches of precipitation a year (NOAA 1991–2020 normals, Brookfield 3.3 Sse station).

How hot do summers get in Bridgewater, CT?

The average high peaks at 85 °F in July, with about 20 days a year at 90 °F or more.

What kind of soil does 06752 have?

The USDA soil survey maps Ridgebury at the center of ZIP 06752: moderately decomposed plant material, poorly drained.

Did spring come early in Bridgewater, CT in 2026?

Spring leaf-out near 06752 came on Apr 2 in 2026, 5 days earlier than the 1991–2020 average (Apr 7), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Bridgewater, CT?

Long-day onions: the longest day near 06752 is 15 h 11 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).

Did the zone for 06752 change?

Yes. The 2012 USDA map put 06752 in zone 6a; the 2023 map puts it in zone 6b. The newer map uses 1991–2020 data and more weather stations.