Frost Dates for Milbank, SD

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 5
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 2

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 25
First Fall Hard Freeze October 13
45.23°N, 96.62°W © OpenStreetMap

Growing Season

150 Days May 5 to October 2

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 4a

Avg. annual minimum: −30 to −25°F

Learn more

Köppen Climate

The 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

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
January21°12°4°
February26°16°7°
March38°28°19°
April54°43°32°
May67°56°45°
June77°67°56°
July81°71°60°
August79°68°57°
September72°60°48°
October58°46°35°
November41°31°22°
December27°18°10°

Precipitation

Precipitation table
Average monthly precipitation (inches)
MonthPrecipitation
January2.6
February2.3
March4.0
April4.9
May4.4
June5.1
July5.6
August4.5
September4.4
October4.3
November3.2
December2.8

Sunrise / Sunset

Daylight Central Time (CT) Longest: 15h 27m · Shortest: 8h 33m
Sunrise and sunset table
Sunrise, sunset, and daylight on the 15th of each month (Central Time (CT))
Month Sunrise Sunset Daylight
January8:08 AM5:03 PM8h 55m
February7:36 AM5:46 PM10h 10m
March7:48 AM7:25 PM11h 37m
April6:48 AM8:05 PM13h 17m
May6:03 AM8:43 PM14h 40m
June5:44 AM9:10 PM15h 26m
July5:58 AM9:06 PM15h 07m
August6:33 AM8:28 PM13h 55m
September7:12 AM7:30 PM12h 18m
October7:51 AM6:32 PM10h 41m
November7:34 AM4:50 PM9h 16m
December8:05 AM4:39 PM8h 34m

Nearby Stations

Milbank 4 Nw, SDMay 2 - October 4 Wilmot, SDMay 5 - October 1 Summit 1 W, SD May 14 - September 28 Artichoke Lake 1 E, MN May 1 - October 8 Madison Wwtp, MNMay 3 - October 2 Browns Valley, MN May 9 - September 28

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