Frost Dates for Concord, NH

Based on data from Concord Muni AP weather station, 2 miles away

Frost Dates

Last Spring Frost (50%) iA 50% chance that the last spring frost has already passed by this date. Most gardeners use this as their primary planting guide. May 8
First Fall Frost (50%) iA 50% chance that the first fall frost has occurred by this date. Plan to harvest or protect tender plants before this date. October 3
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

30% Probability iOnly a 30% chance of frost remaining by this date. Use these dates for a safer planting window, especially for tender plants sensitive to cold.

Last Spring Frost May 15
First Fall Frost September 29

Hard Freeze (28°F)

Last Spring Hard Freeze April 27
First Fall Hard Freeze October 13
43.21°N, -71.54°W © OpenStreetMap

Growing Season

148 Days May 8 to October 3

USDA Hardiness Zone iHardiness zones indicate which perennial plants can survive winter in your area. For annual vegetables, frost dates and growing season length matter more than hardiness zone.

Zone 5b

Avg. annual minimum: −15 to −10°F (−26 to −23°C)

Learn more

Köppen Climate iThe Köppen climate classification system categorizes climates based on temperature and precipitation patterns.

Dfa Hot-Summer Continental

Hot summers and cold winters with year-round precipitation. Moderate growing season supports warm-season crops like tomatoes, peppers, and corn. Winter protection extends the harvest.

Köppen climate map

Temperature

10° 30° 50° 70° 90°
22°
High: 32°F
Avg: 22°F
Low: 13°F
Jan
25°
High: 35°F
Avg: 25°F
Low: 15°F
Feb
33°
High: 44°F
Avg: 33°F
Low: 23°F
Mar
45°
High: 58°F
Avg: 45°F
Low: 33°F
Apr
57°
High: 69°F
Avg: 57°F
Low: 44°F
May
66°
High: 78°F
Avg: 66°F
Low: 54°F
Jun
71°
High: 83°F
Avg: 71°F
Low: 59°F
Jul
70°
High: 82°F
Avg: 70°F
Low: 57°F
Aug
61°
High: 74°F
Avg: 61°F
Low: 49°F
Sep
49°
High: 61°F
Avg: 49°F
Low: 38°F
Oct
39°
High: 48°F
Avg: 39°F
Low: 29°F
Nov
28°
High: 37°F
Avg: 28°F
Low: 20°F
Dec
32°F
28°F
Avg High Avg Temp Avg Low Light Frost (32°F) Hard Frost (28°F)

Precipitation

0" 2" 4" 5.2"
3.8"
3.80"
Jan
3.8"
3.84"
Feb
4.2"
4.22"
Mar
4.7"
4.71"
Apr
4.6"
4.60"
May
4.5"
4.55"
Jun
4.8"
4.78"
Jul
4.9"
4.87"
Aug
5.0"
4.99"
Sep
5.2"
5.16"
Oct
4.6"
4.57"
Nov
4.6"
4.60"
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec9h10.5h11.5h13h14.5h15h15h14h12.5h11h9.5h9h
Jan: 7:26 AM – 4:34 PM · 9h 08m
Feb: 6:51 AM – 5:09 PM · 10h 18m
Mar: 6:11 AM – 5:49 PM · 11h 39m
Apr: 5:24 AM – 6:36 PM · 13h 12m
May: 4:45 AM – 7:15 PM · 14h 29m
Jun: 4:25 AM – 7:35 PM · 15h 11m
Jul: 4:33 AM – 7:27 PM · 14h 54m
Aug: 5:07 AM – 6:53 PM · 13h 47m
Sep: 5:52 AM – 6:08 PM · 12h 17m
Oct: 6:37 AM – 5:23 PM · 10h 47m
Nov: 7:16 AM – 4:44 PM · 9h 28m
Dec: 7:36 AM – 4:24 PM · 8h 49m
Daylight Longest: 15h 12m · Shortest: 8h 48m

Nearby Stations

Hopkinton Lake, NH May 6 - October 1 Weare, NHMay 2 - October 8 Weare 2 Ne, NHMay 9 - October 5 Massabesic Lake, NH April 30 - October 11 Salisbury, NH May 14 - September 29 Manchester AP, NH April 21 - October 19

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