Frost Dates for Kalispell, MT
Based on data from Kalispell Glacier AP weather station, 8 miles away
Elevation: 2956 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 31
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 10
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 7
First Fall Frost
September 4
Hard Freeze (28°F)
Last Spring Hard Freeze
May 10
First Fall Hard Freeze
September 27
Growing Season
102 Days
May 31 to September 10
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
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.
Temperature
10°
30°
50°
70°
90°
Avg High
Avg Temp
Avg Low
Light Frost (32°F)
Hard Frost (28°F)
Temperature table
| Month | Avg High | Avg Temp | Avg Low |
|---|---|---|---|
| January | 31° | 24° | 16° |
| February | 36° | 27° | 18° |
| March | 45° | 35° | 24° |
| April | 55° | 43° | 31° |
| May | 65° | 52° | 38° |
| June | 71° | 58° | 44° |
| July | 82° | 65° | 48° |
| August | 82° | 64° | 46° |
| September | 70° | 54° | 38° |
| October | 54° | 42° | 29° |
| November | 39° | 31° | 24° |
| December | 31° | 24° | 17° |
Precipitation
0"
1"
2"
3"
3.7"
Precipitation table
| Month | Precipitation |
|---|---|
| January | 1.8 |
| February | 1.4 |
| March | 1.7 |
| April | 1.8 |
| May | 2.7 |
| June | 3.7 |
| July | 2.7 |
| August | 1.9 |
| September | 2.3 |
| October | 2.5 |
| November | 1.9 |
| December | 1.9 |
Sunrise / Sunset
Daylight
Mountain Time (MT)
Longest: 15h 53m · Shortest: 8h 07m
Sunrise and sunset table
| Month | Sunrise | Sunset | Daylight |
|---|---|---|---|
| January | 8:30 AM | 5:03 PM | 8h 33m |
| February | 7:53 AM | 5:50 PM | 9h 57m |
| March | 7:59 AM | 7:34 PM | 11h 35m |
| April | 6:54 AM | 8:20 PM | 13h 26m |
| May | 6:03 AM | 9:03 PM | 14h 60m |
| June | 5:42 AM | 9:33 PM | 15h 51m |
| July | 5:58 AM | 9:28 PM | 15h 30m |
| August | 6:37 AM | 8:45 PM | 14h 08m |
| September | 7:22 AM | 7:42 PM | 12h 20m |
| October | 8:06 AM | 6:38 PM | 10h 32m |
| November | 7:54 AM | 4:50 PM | 8h 56m |
| December | 8:29 AM | 4:37 PM | 8h 08m |
Nearby Stations
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