Frost Dates for Agassiz Refuge, MN

Elevation: 348 m

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 6
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 3

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 11
First Fall Frost September 28

Hard Freeze (28°F)

Last Spring Hard Freeze April 28
First Fall Hard Freeze October 12
48.30°N, 95.98°W © OpenStreetMap

Growing Season

150 Days May 6 to October 3

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 3b

Avg. annual minimum: −35 to −30°F

Learn more

Köppen Climate

The Köppen climate classification system categorizes climates based on temperature and precipitation patterns.
Dwb Warm-Summer Continental (Dry Winter)

Warm, wet summers and cold, dry winters. Growing season is concentrated in summer months. Hardy crops and those suited to short seasons perform best.

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
January16°6°-3°
February22°11°0°
March36°26°15°
April53°42°31°
May67°56°44°
June77°66°55°
July81°70°59°
August80°68°57°
September70°59°48°
October54°44°34°
November36°28°19°
December21°13°5°

Precipitation

Precipitation table
Average monthly precipitation (inches)
MonthPrecipitation
January1.0
February1.0
March1.6
April1.9
May3.1
June3.8
July3.3
August4.1
September4.0
October2.6
November1.9
December1.4

Sunrise / Sunset

Daylight Longest: 15h 53m · Shortest: 8h 07m
Sunrise and sunset table
Sunrise, sunset, and daylight on the 15th of each month (local solar time)
Month Sunrise Sunset Daylight
January7:44 AM4:16 PM8h 33m
February7:01 AM4:59 PM9h 57m
March6:13 AM5:47 PM11h 35m
April5:17 AM6:43 PM13h 26m
May4:30 AM7:30 PM14h 60m
June4:04 AM7:56 PM15h 51m
July4:15 AM7:45 PM15h 30m
August4:56 AM7:04 PM14h 08m
September5:50 AM6:10 PM12h 20m
October6:44 AM5:16 PM10h 32m
November7:32 AM4:28 PM8h 57m
December7:56 AM4:04 PM8h 08m

Nearby Stations

Goodridge 12 Nnw, MN May 20 - September 17 Thief Rvr Falls 2, MN May 14 - September 28 Red Lake Falls, MN May 9 - September 30 Thorhult, MNMay 24 - September 20 Warren Wsd, MNMay 5 - October 2 Argyle, MNMay 15 - September 26

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