Frost Dates for Missoula 2 Ne, MT

Elevation: 1042 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 10
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 17
First Fall Frost September 26

Hard Freeze (28°F)

Last Spring Hard Freeze April 28
First Fall Hard Freeze October 12
46.90°N, 113.97°W © OpenStreetMap

Growing Season

144 Days May 10 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 6a

Avg. annual minimum: −10 to −5°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
January34°27°20°
February39°30°22°
March49°38°27°
April57°45°33°
May67°54°41°
June73°60°47°
July85°69°52°
August84°68°51°
September73°58°44°
October57°45°34°
November41°34°26°
December33°26°20°

Precipitation

Precipitation table
Average monthly precipitation (inches)
MonthPrecipitation
January1.8
February1.4
March1.7
April2.1
May3.1
June3.0
July2.7
August2.6
September2.5
October2.3
November1.8
December1.9

Sunrise / Sunset

Daylight Mountain Time (MT) Longest: 15h 41m · Shortest: 8h 19m
Sunrise and sunset table
Sunrise, sunset, and daylight on the 15th of each month (Mountain Time (MT))
Month Sunrise Sunset Daylight
January8:24 AM5:07 PM8h 43m
February7:49 AM5:52 PM10h 03m
March7:58 AM7:33 PM11h 36m
April6:55 AM8:17 PM13h 22m
May6:07 AM8:57 PM14h 51m
June5:46 AM9:26 PM15h 39m
July6:02 AM9:21 PM15h 19m
August6:39 AM8:41 PM14h 02m
September7:21 AM7:40 PM12h 19m
October8:03 AM6:39 PM10h 37m
November7:48 AM4:54 PM9h 06m
December8:21 AM4:42 PM8h 20m

Nearby Stations

Missoula Intl AP, MT May 16 - September 26 Missoula 6 Nw Wfo, MT May 6 - October 4 Potomac, MT Alberton, MTMay 18 - September 25 Stevensville, MT May 22 - September 19 Saint Ignatius, MT May 12 - October 2

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