When is the last frost in Concord, NH?

The average last spring frost (50% probability of 32°F) in Concord is around May 8, based on NOAA/NCEI 1991–2020 normals at the Concord Muni Ap, NH station (4.1 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 Concord?

The average first fall frost in Concord, NH is around October 3, giving roughly a 146-day frost-free growing season.

What planting zone is Concord, NH?

Concord is in USDA plant hardiness zone 5b (average annual extreme minimum temperature -15 to -10°F), from the 2023 USDA Plant Hardiness Zone Map.

What is the weather like in Concord?

In Concord, NH the warmest month is July (avg high 83°F) and the coldest is January (avg low 12.9°F). It averages about 42″ of precipitation a year and 67.7″ of snow.

Home › New Hampshire › Concord

Concord, NH Planting Calendar & Frost Dates

USDA hardiness zone 5b · ZIP 03301 · elevation 106′ · NOAA & USDA data

Concord is in USDA hardiness zone 5b (winters can dip to -15 to -10°F), with a growing season of about 146 days between the average last spring frost (May 8) and first fall frost (October 3). The warmest month is July (avg high 83°F); the coldest is January (avg low 12.9°F). It averages 42″ of precipitation a year and 67.7″ 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 -15 to -10°F

Last spring frost

May 8

avg (50% prob, 32°F)

First fall frost

October 3

avg (50% prob, 32°F)

Growing season

146 days

frost-free window

Warmest month

July

avg high 83°F

Month-by-month typical weather in Concord

Average conditions from the NOAA/NCEI 1991–2020 U.S. Climate Normals at Concord Muni Ap, NH (4.1 mi away). Temperatures °F, precipitation & snow in inches.

Month	Avg high	Avg low	Mean	Precip (in)	Snow (in)
January	31.6	12.9	22.3	2.8	17.1
February	34.8	14.7	24.7	2.8	16.9
March	43.6	23.3	33.4	3.3	13.6
April	57.5	33.3	45.4	3.4	2.5
May	69.3	44.1	56.7	3.5	0
June	77.8	53.7	65.8	3.8	0
July	83	59.2	71.1	3.6	0
August	81.7	57.2	69.5	3.6	0
September	73.7	49	61.4	3.6	0
October	60.9	37.8	49.3	4.4	0.8
November	48.4	28.7	38.6	3.4	2.5
December	37.1	19.5	28.3	3.7	14.3

What to plant when in Concord

Crop	Season	What to do & when
Tomatoes	warm	Start seeds indoors: March 27 · Transplant out: May 15
Peppers	warm	Start seeds indoors: March 13 · Transplant out: May 22
Cucumbers	warm	Direct sow: May 15
Zucchini / squash	warm	Direct sow: May 15
Bush beans	warm	Direct sow: May 15
Sweet corn	warm	Direct sow: May 15
Basil	warm	Transplant out: May 15
Peas	cool	Sow (spring): April 3 · Sow (fall): August 8
Spinach	cool	Sow (spring): March 27 · Sow (fall): August 8
Lettuce	cool	Sow (spring): April 10 · Sow (fall): August 8
Kale	cool	Transplant (spring): April 17 · Sow (fall): July 25
Broccoli	cool	Transplant (spring): April 24
Carrots	cool	Sow (spring): April 17 · Sow (fall): July 25
Onions	cool	Transplant (spring): April 10
Potatoes	cool	Plant seed potatoes: April 24
Radishes	cool	Sow (spring): April 10 · Sow (fall): August 22

Dates are computed from Concord'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.

Want the exact dates for your yard? →
Look up your precise ZIP-code frost dates and a full 26-crop planting calendar on our free interactive tool.
Open the frost & planting tool

🌾 Get a frost reminder

One email in early spring and early fall with the dates for your area. No spam.

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 New Hampshire

Manchester, NH Nashua, NH

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 — Concord Muni Ap, NH, 4.1 mi (confidence: high). Monthly weather normals: Concord Muni Ap, NH, 4.1 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.