Frost Dates for Valentine, 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. May 18
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 21
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 May 23
First Fall Frost September 16

Hard Freeze (28°F / -2°C)

Last Spring Hard Freeze May 7
First Fall Hard Freeze September 29
47.34°N, -108.50°W © OpenStreetMap

Growing Season

126 Days May 18 to September 21

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 3b

Learn more

Temperature

0° 30° 60° 90°
19°
High: 33°
Avg: 19°
Low: 6°
Jan
23°
High: 36°
Avg: 23°
Low: 10°
Feb
33°
High: 47°
Avg: 33°
Low: 19°
Mar
43°
High: 57°
Avg: 43°
Low: 29°
Apr
53°
High: 66°
Avg: 53°
Low: 39°
May
62°
High: 75°
Avg: 62°
Low: 49°
Jun
70°
High: 86°
Avg: 70°
Low: 54°
Jul
69°
High: 85°
Avg: 69°
Low: 52°
Aug
58°
High: 74°
Avg: 58°
Low: 42°
Sep
44°
High: 59°
Avg: 44°
Low: 30°
Oct
32°
High: 45°
Avg: 32°
Low: 18°
Nov
22°
High: 35°
Avg: 22°
Low: 9°
Dec
32°F
28°F
Avg High Avg Temp Avg Low Light Frost (32°F) Hard Frost (28°F)

Precipitation

0" 2" 4" 4.7"
2.8"
2.76"
Jan
2.2"
2.24"
Feb
2.8"
2.83"
Mar
3.2"
3.24"
Apr
4.6"
4.63"
May
4.7"
4.72"
Jun
3.7"
3.66"
Jul
3.4"
3.41"
Aug
3.3"
3.32"
Sep
3.7"
3.67"
Oct
3.0"
3.05"
Nov
3.1"
3.10"
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec9h10h12h13h15h16h15h14h12h11h9h8h
Jan: 7:40 AM – 4:20 PM · 8h 40m
Feb: 6:59 AM – 5:01 PM · 10h 01m
Mar: 6:12 AM – 5:48 PM · 11h 35m
Apr: 5:19 AM – 6:41 PM · 13h 23m
May: 4:33 AM – 7:27 PM · 14h 53m
Jun: 4:08 AM – 7:52 PM · 15h 43m
Jul: 4:19 AM – 7:41 PM · 15h 23m
Aug: 4:58 AM – 7:02 PM · 14h 04m
Sep: 5:50 AM – 6:10 PM · 12h 19m
Oct: 6:42 AM – 5:18 PM · 10h 35m
Nov: 7:29 AM – 4:31 PM · 9h 03m
Dec: 7:52 AM – 4:08 PM · 8h 17m
Daylight Longest: 15h 45m · Shortest: 8h 15m

Nearby Stations

Roy 8 Ne, MTMay 14 - September 24 Sand Creek, MT May 12 - September 27 Grass Range, MT May 20 - September 24 Flatwillow 4 Ene, MT May 16 - September 28 Mosby 4 Ene, MTMay 5 - October 4 Zortman, MTMay 18 - September 23

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