Frost Dates for Ashton, ID

Based on data from Ashton 1n weather station, 0 miles away

Elevation: 5259 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 21
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 21

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 June 1
First Fall Frost September 13

Hard Freeze (28°F)

Last Spring Hard Freeze May 3
First Fall Hard Freeze October 4
44.07°N, 111.45°W © OpenStreetMap

Growing Season

123 Days May 21 to September 21

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.
Dfb Warm-Summer Continental

Warm summers and cold, snowy winters. A shorter growing season than hot-summer continental. Hardy vegetables, root crops, and cool-season greens do well. Season extension is valuable.

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
January29°21°13°
February33°25°17°
March42°33°25°
April54°43°31°
May65°53°40°
June73°59°46°
July83°67°51°
August83°66°49°
September73°57°42°
October57°45°32°
November40°31°23°
December29°22°15°

Precipitation

Precipitation table
Average monthly precipitation (inches)
MonthPrecipitation
January4.8
February4.5
March4.8
April4.4
May5.6
June5.4
July3.8
August3.9
September4.6
October6.3
November5.5
December4.8

Sunrise / Sunset

Daylight Mountain Time (MT) Longest: 15h 19m · Shortest: 8h 41m
Sunrise and sunset table
Sunrise, sunset, and daylight on the 15th of each month (Mountain Time (MT))
Month Sunrise Sunset Daylight
January8:04 AM5:07 PM9h 03m
February7:33 AM5:48 PM10h 14m
March7:46 AM7:25 PM11h 38m
April6:49 AM8:03 PM13h 14m
May6:05 AM8:39 PM14h 34m
June5:47 AM9:05 PM15h 17m
July6:02 AM9:01 PM14h 59m
August6:35 AM8:25 PM13h 50m
September7:12 AM7:29 PM12h 17m
October7:49 AM6:33 PM10h 45m
November7:30 AM4:52 PM9h 23m
December8:00 AM4:43 PM8h 43m

Nearby Stations

Saint Anthony, ID May 17 - September 22 Tetonia Exp Stn, ID June 15 - September 7 Sugar City, ID May 29 - September 13 Rexburg Madison Co AP, ID May 15 - September 23 Island Park, ID Rexburg Byu Idaho, ID May 12 - September 24

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