Frost Dates for Ranchettes, WY

Based on data from Cheyenne weather station, 5 miles away

Elevation: 6201 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 12
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 1

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 18
First Fall Frost September 27

Hard Freeze (28°F)

Last Spring Hard Freeze May 2
First Fall Hard Freeze October 11
41.22°N, 104.79°W © OpenStreetMap

Growing Season

142 Days May 12 to October 1

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.
BSk Cold Semi-Arid (Steppe)

Cool to cold with low rainfall and wide temperature swings. Common in the western Great Plains and central Asia. Short growing seasons benefit from season extension techniques.

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
January40°29°18°
February41°30°18°
March49°37°25°
April55°43°31°
May64°52°40°
June77°63°49°
July84°70°56°
August82°68°54°
September73°60°46°
October59°47°34°
November48°36°25°
December39°29°18°

Precipitation

Precipitation table
Average monthly precipitation (inches)
MonthPrecipitation
January1.2
February1.2
March1.8
April2.1
May2.5
June2.4
July2.4
August2.0
September2.5
October2.2
November1.5
December1.5

Sunrise / Sunset

Daylight Mountain Time (MT) Longest: 14h 58m · Shortest: 9h 02m
Sunrise and sunset table
Sunrise, sunset, and daylight on the 15th of each month (Mountain Time (MT))
Month Sunrise Sunset Daylight
January7:28 AM4:49 PM9h 21m
February7:01 AM5:26 PM10h 25m
March7:19 AM6:59 PM11h 40m
April6:26 AM7:33 PM13h 07m
May5:46 AM8:05 PM14h 18m
June5:31 AM8:28 PM14h 57m
July5:44 AM8:25 PM14h 41m
August6:14 AM7:53 PM13h 39m
September6:46 AM7:01 PM12h 16m
October7:18 AM6:10 PM10h 52m
November6:55 AM4:34 PM9h 39m
December7:24 AM4:26 PM9h 03m

Nearby Stations

Cheyenne Wfo, WY May 14 - October 1 Archer, WYMay 21 - September 24 Hecla 1e, WYMay 27 - September 19 Carpenter 3n, WY May 14 - September 26 Nunn 7 Nne, CO May 13 - September 27 Virginia Dale 7 Ene, CO May 31 - September 19

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