Frost Dates for Mountain Home, ID

Based on data from Mtn Home weather station, 1 miles away

Elevation: 3146 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 2
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 8

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 10
First Fall Frost October 1

Hard Freeze (28°F)

Last Spring Hard Freeze April 18
First Fall Hard Freeze October 20
43.13°N, 115.69°W © OpenStreetMap

Growing Season

159 Days May 2 to October 8

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 7a

Avg. annual minimum: 0 to 5°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°32°23°
February47°36°26°
March56°43°30°
April63°49°36°
May74°59°45°
June84°68°52°
July95°77°60°
August93°75°58°
September82°65°48°
October67°52°37°
November50°39°28°
December39°31°23°

Precipitation

Precipitation table
Average monthly precipitation (inches)
MonthPrecipitation
January3.5
February2.6
March3.0
April2.8
May3.2
June2.2
July0.0
August0.0
September0.0
October2.2
November2.8
December3.2

Sunrise / Sunset

Daylight Mountain Time (MT) Longest: 15h 12m · Shortest: 8h 48m
Sunrise and sunset table
Sunrise, sunset, and daylight on the 15th of each month (Mountain Time (MT))
Month Sunrise Sunset Daylight
January8:18 AM5:27 PM9h 09m
February7:49 AM6:06 PM10h 18m
March8:03 AM7:42 PM11h 39m
April7:07 AM8:19 PM13h 11m
May6:25 AM8:53 PM14h 29m
June6:08 AM9:18 PM15h 10m
July6:22 AM9:15 PM14h 53m
August6:54 AM8:40 PM13h 46m
September7:29 AM7:46 PM12h 17m
October8:04 AM6:52 PM10h 47m
November7:44 AM5:12 PM9h 28m
December8:14 AM5:03 PM8h 49m

Nearby Stations

Bruneau, IDApril 17 - October 17 Glenns Ferry, IDMay 1 - October 3 Grand View 4 Nw, ID April 28 - October 6 Boise Lucky Peak Dam, ID April 30 - October 22 Arrowrock Dam, ID April 28 - October 14 Hill City 1 W, ID June 16 - September 6

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