Frost Dates for Johnson Siding, SD

Elevation: 1275 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 20
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 25

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 26
First Fall Frost September 20

Hard Freeze (28°F)

Last Spring Hard Freeze May 8
First Fall Hard Freeze October 4
44.08°N, 103.43°W © OpenStreetMap

Growing Season

128 Days May 20 to September 25

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.
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
January39°26°12°
February39°27°14°
March48°34°21°
April55°42°29°
May64°51°39°
June75°61°47°
July83°68°54°
August81°67°52°
September73°58°43°
October59°45°32°
November48°34°21°
December40°27°14°

Precipitation

Precipitation table
Average monthly precipitation (inches)
MonthPrecipitation
January2.2
February1.9
March3.4
April5.2
May7.0
June6.4
July5.8
August5.2
September3.8
October3.5
November1.7
December1.3

Sunrise / Sunset

Daylight Longest: 15h 19m · Shortest: 8h 41m
Sunrise and sunset table
Sunrise, sunset, and daylight on the 15th of each month (local solar time)
Month Sunrise Sunset Daylight
January7:29 AM4:31 PM9h 03m
February6:53 AM5:07 PM10h 14m
March6:11 AM5:49 PM11h 38m
April5:23 AM6:37 PM13h 14m
May4:43 AM7:17 PM14h 34m
June4:21 AM7:39 PM15h 17m
July4:30 AM7:30 PM14h 60m
August5:05 AM6:55 PM13h 50m
September5:51 AM6:09 PM12h 17m
October6:38 AM5:22 PM10h 45m
November7:19 AM4:41 PM9h 23m
December7:39 AM4:21 PM8h 42m

Nearby Stations

Pactola Dam, SD May 28 - September 18 Rapid City 4nw, SD May 10 - October 5 Rapid City Wfo, SD May 3 - October 8 Hill City, SD June 1 - September 10 Mt Rushmore Nmem, SD May 15 - October 1 Rochford 2 Wnw, SD

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