When is the last frost in Norwich, CT?

The average last spring frost (50% probability of 32°F) in Norwich is around April 14, based on NOAA/NCEI 1991–2020 normals at the Norwich Public Utility Plt, CT station (1.9 mi away). Half of years it falls outside that date, so wait 1–2 weeks past it before setting out frost-tender plants.

When is the first fall frost in Norwich?

The average first fall frost in Norwich, CT is around October 24, giving roughly a 192-day frost-free growing season.

What planting zone is Norwich, CT?

Norwich is in USDA plant hardiness zone 6b (average annual extreme minimum temperature -5 to 0°F), from the 2023 USDA Plant Hardiness Zone Map.

What is the weather like in Norwich?

In Norwich, CT the warmest month is July (avg high 84.1°F) and the coldest is January (avg low 21.2°F). It averages about 52.2″ of precipitation a year and 27.8″ of snow.

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Norwich, CT Planting Calendar & Frost Dates

USDA hardiness zone 6b · ZIP 06360 · elevation 6′ · NOAA & USDA data

Norwich is in USDA hardiness zone 6b (winters can dip to -5 to 0°F), with a growing season of about 192 days between the average last spring frost (April 14) and first fall frost (October 24). The warmest month is July (avg high 84.1°F); the coldest is January (avg low 21.2°F). It averages 52.2″ of precipitation a year and 27.8″ of snow, mostly mid-winter. Start cool-season crops several weeks before the last frost; wait until after it for tomatoes, peppers and other tender crops.

Hardiness zone

min temp -5 to 0°F

Last spring frost

April 14

avg (50% prob, 32°F)

First fall frost

October 24

avg (50% prob, 32°F)

Growing season

192 days

frost-free window

Warmest month

July

avg high 84.1°F

Month-by-month typical weather in Norwich

Average conditions from the NOAA/NCEI 1991–2020 U.S. Climate Normals at Norwich Public Utility Plt, CT (1.9 mi away). Temperatures °F, precipitation & snow in inches.

Month	Avg high	Avg low	Mean	Precip (in)	Snow (in)
January	37.7	21.2	29.5	3.9	9
February	40.5	22.9	31.7	3.8	7.1
March	47.8	29.4	38.6	5.1	5
April	59.3	39.1	49.2	4.7	0.8
May	69.9	48.9	59.4	3.6	0
June	78.4	58.5	68.4	4.3	0
July	84.1	64.8	74.4	3.6	0
August	82.6	62.7	72.6	4.4	0
September	75.5	54.9	65.2	4.8	0
October	63.9	43.6	53.8	4.9	0
November	53	34.3	43.6	4.2	0.3
December	43.2	27	35.1	5	5.6

What to plant when in Norwich

Crop	Season	What to do & when
Tomatoes	warm	Start seeds indoors: March 3 · Transplant out: April 21
Peppers	warm	Start seeds indoors: February 17 · Transplant out: April 28
Cucumbers	warm	Direct sow: April 21
Zucchini / squash	warm	Direct sow: April 21
Bush beans	warm	Direct sow: April 21
Sweet corn	warm	Direct sow: April 21
Basil	warm	Transplant out: April 21
Peas	cool	Sow (spring): March 10 · Sow (fall): August 29
Spinach	cool	Sow (spring): March 3 · Sow (fall): August 29
Lettuce	cool	Sow (spring): March 17 · Sow (fall): August 29
Kale	cool	Transplant (spring): March 24 · Sow (fall): August 15
Broccoli	cool	Transplant (spring): March 31
Carrots	cool	Sow (spring): March 24 · Sow (fall): August 15
Onions	cool	Transplant (spring): March 17
Potatoes	cool	Plant seed potatoes: March 31
Radishes	cool	Sow (spring): March 17 · Sow (fall): September 12

Dates are computed from Norwich's average frost dates using standard cool-/warm-season timing. They're a starting point — a cold spring, a warm microclimate, or a fast-maturing variety can shift them by a week or two.

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Gear that helps you plant on time

Some links below are Amazon affiliate links (tag theboringthin-20). If you buy through them we may earn a small commission at no extra cost to you — it keeps this almanac free. We only list generic, genuinely-useful categories.

Soil thermometer →Know when the ground is warm enough to sow — the honest signal, not the calendar.Seed-starting trays + dome →Start tomatoes & peppers indoors on the schedule below.Seedling heat mat →Warms the soil for faster, more even germination indoors.Floating row cover / frost cloth →Buys you 4–8°F to beat an early or late frost.Raised garden bed kit →Warms and drains faster in spring than in-ground soil.Garden gloves →Basic kit for transplant day.

Nearby cities in Connecticut

Middletown, CT Hartford, CT Meriden, CT New Britain, CT Bristol, CT New Haven, CT West Haven, CT Waterbury, CT

Sources & method. Hardiness zone: 2023 USDA Plant Hardiness Zone Map (PRISM Climate Group, Oregon State University). Frost dates & growing season: NOAA/NCEI 1991–2020 U.S. Climate Normals, nearest station with published freeze normals — Norwich Public Utility Plt, CT, 1.9 mi (confidence: high). Monthly weather normals: Norwich Public Utility Plt, CT, 1.9 mi (confidence: high). ZIP centroid from U.S. Census 2023 ZCTA data. Frost dates are the 50%-probability date — half of years frost occurs outside the stated date. Nothing here is invented; where the nearest station is far, we say so. Last updated 2026-07-22.