Frost Dates for Boscawen, NH

Based on data from Salisbury weather station, 6 miles away

Elevation: 318 ft

Frost Dates

Last Spring Frost (50%) A 50% chance that the last spring frost has already passed by this date. Most gardeners use this as their primary planting guide. May 14
First Fall Frost (50%) A 50% chance that the first fall frost has occurred by this date. Plan to harvest or protect tender plants before this date. September 29

30% Probability

Only 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 20
First Fall Frost September 23

Hard Freeze (28°F)

Last Spring Hard Freeze April 30
First Fall Hard Freeze October 9
43.32°N, 71.62°W © OpenStreetMap

Growing Season

138 Days May 14 to September 29

USDA Hardiness Zone

Hardiness 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

Learn more

Köppen Climate

The Köppen climate classification system categorizes climates based on temperature and precipitation patterns.
Dfb Warm-Summer Continental

Warm summers and cold, snowy winters. A shorter growing season than hot-summer continental. Hardy vegetables, root crops, and cool-season greens do well. Season extension is valuable.

Köppen climate map

Temperature

Avg High Avg Temp Avg Low Light Frost (32°F) Hard Frost (28°F)
Temperature table
Average monthly temperatures (°F)
Month Avg High Avg Temp Avg Low
January31°22°13°
February34°25°15°
March42°32°22°
April55°43°31°
May67°54°41°
June75°63°51°
July80°68°57°
August79°67°55°
September71°59°46°
October58°47°36°
November47°38°29°
December36°28°20°

Precipitation

Precipitation table
Average monthly precipitation (inches)
MonthPrecipitation
January5.0
February4.3
March5.4
April6.0
May5.6
June5.2
July5.7
August5.0
September5.0
October4.6
November5.4
December5.5

Sunrise / Sunset

Daylight Eastern Time (ET) Longest: 15h 13m · Shortest: 8h 47m
Sunrise and sunset table
Sunrise, sunset, and daylight on the 15th of each month (Eastern Time (ET))
Month Sunrise Sunset Daylight
January7:23 AM4:30 PM9h 07m
February6:53 AM5:10 PM10h 17m
March7:07 AM6:46 PM11h 39m
April6:11 AM7:23 PM13h 12m
May5:28 AM7:58 PM14h 30m
June5:11 AM8:23 PM15h 12m
July5:25 AM8:20 PM14h 55m
August5:58 AM7:45 PM13h 47m
September6:33 AM6:50 PM12h 17m
October7:09 AM5:55 PM10h 46m
November6:49 AM4:16 PM9h 27m
December7:19 AM4:07 PM8h 48m

Nearby Stations

Franklin Falls Dam, NH May 7 - October 3 Hopkinton Lake, NH May 6 - October 1 Bradford 2, NH May 15 - September 27 Concord Muni AP, NH May 8 - October 3 Mt Sunapee, NHMay 2 - October 9 Weare 2 Ne, NHMay 9 - October 5

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