Frost Dates for Frankfort, ME

Based on data from Bangor Intl AP weather station, 13 miles away

Elevation: 36 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 4
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. October 4

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 9
First Fall Frost September 30

Hard Freeze (28°F)

Last Spring Hard Freeze April 23
First Fall Hard Freeze October 17
44.61°N, 68.88°W © OpenStreetMap

Growing Season

153 Days May 4 to October 4

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 5a

Avg. annual minimum: −20 to −15°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
January28°19°9°
February31°21°11°
March40°31°21°
April53°43°32°
May66°55°43°
June75°64°53°
July80°70°59°
August79°68°57°
September71°60°49°
October58°48°38°
November46°37°29°
December35°26°17°

Precipitation

Precipitation table
Average monthly precipitation (inches)
MonthPrecipitation
January4.4
February4.3
March5.0
April5.1
May5.0
June4.5
July4.5
August4.4
September5.4
October5.9
November5.6
December4.8

Sunrise / Sunset

Daylight Eastern Time (ET) Longest: 15h 24m · Shortest: 8h 36m
Sunrise and sunset table
Sunrise, sunset, and daylight on the 15th of each month (Eastern Time (ET))
Month Sunrise Sunset Daylight
January7:16 AM4:14 PM8h 58m
February6:44 AM4:56 PM10h 11m
March6:56 AM6:34 PM11h 38m
April5:58 AM7:13 PM13h 16m
May5:13 AM7:51 PM14h 38m
June4:54 AM8:17 PM15h 23m
July5:09 AM8:13 PM15h 04m
August5:43 AM7:36 PM13h 53m
September6:21 AM6:39 PM12h 18m
October6:59 AM5:42 PM10h 43m
November6:41 AM3:60 PM9h 19m
December7:13 AM3:50 PM8h 37m

Nearby Stations

Orono, MEMay 1 - October 6 Old Town 2 W, ME May 13 - September 28 Corinna, MEMay 8 - October 3 E Surry, MEMay 8 - October 9 Belfast, MEMay 7 - October 5 Dover-Foxcroft Wwtp, ME May 15 - September 28

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