Frost Dates for Adel, MT

Frost Dates

Last Spring Frost (50%) iA 50% chance that the last spring frost has already passed by this date. Most gardeners use this as their primary planting guide. June 4
First Fall Frost (50%) iA 50% chance that the first fall frost has occurred by this date. Plan to harvest or protect tender plants before this date. September 12
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

30% Probability iOnly 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 11
First Fall Frost September 6

Hard Freeze (28°F / -2°C)

Last Spring Hard Freeze May 16
First Fall Hard Freeze September 27
47.01°N, -111.67°W © OpenStreetMap

Growing Season

100 Days June 4 to September 12

USDA Hardiness Zone iHardiness 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

Learn more

Temperature

10° 30° 50° 70°
25°
High: 36°
Avg: 25°
Low: 14°
Jan
25°
High: 37°
Avg: 25°
Low: 14°
Feb
32°
High: 43°
Avg: 32°
Low: 21°
Mar
39°
High: 50°
Avg: 39°
Low: 27°
Apr
47°
High: 58°
Avg: 47°
Low: 35°
May
54°
High: 67°
Avg: 54°
Low: 42°
Jun
62°
High: 78°
Avg: 62°
Low: 47°
Jul
62°
High: 78°
Avg: 62°
Low: 46°
Aug
53°
High: 68°
Avg: 53°
Low: 39°
Sep
42°
High: 53°
Avg: 42°
Low: 31°
Oct
32°
High: 42°
Avg: 32°
Low: 23°
Nov
24°
High: 33°
Avg: 24°
Low: 15°
Dec
32°F
28°F
Avg High Avg Temp Avg Low Light Frost (32°F) Hard Frost (28°F)

Precipitation

0" 2" 4" 4.3"
1.9"
1.86"
Jan
1.7"
1.68"
Feb
2.2"
2.23"
Mar
3.0"
3.01"
Apr
4.3"
4.29"
May
3.9"
3.90"
Jun
3.4"
3.43"
Jul
3.4"
3.44"
Aug
3.3"
3.30"
Sep
3.0"
3.04"
Oct
2.4"
2.35"
Nov
1.9"
1.94"
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec9h10h12h13h15h16h15h14h12h11h9h8h
Jan: 7:39 AM – 4:21 PM · 8h 43m
Feb: 6:59 AM – 5:01 PM · 10h 03m
Mar: 6:12 AM – 5:48 PM · 11h 36m
Apr: 5:19 AM – 6:41 PM · 13h 22m
May: 4:34 AM – 7:26 PM · 14h 51m
Jun: 4:10 AM – 7:50 PM · 15h 40m
Jul: 4:20 AM – 7:40 PM · 15h 20m
Aug: 4:59 AM – 7:01 PM · 14h 02m
Sep: 5:50 AM – 6:10 PM · 12h 19m
Oct: 6:42 AM – 5:18 PM · 10h 36m
Nov: 7:27 AM – 4:33 PM · 9h 05m
Dec: 7:50 AM – 4:10 PM · 8h 19m
Daylight Longest: 15h 42m · Shortest: 8h 18m

Nearby Stations

Cascade 20 Sse, MT Cascade 5 S, MT May 21 - September 19 Holter Dam, MT May 19 - September 24 Millegan 14 Se, MT June 11 - September 6 Helena Rgnl AP, MT May 9 - September 30 Rogers Pass 9 Nne, MT May 21 - September 15

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