Frost Dates for Plains, MT

Based on data from Saint Regis 1 Ne weather station, 15 miles away

Frost Dates

This location has year-round freezing temperatures.

47.46°N, -114.88°W © OpenStreetMap

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

Avg. annual minimum: −15 to −10°F (−26 to −23°C)

Learn more

Köppen Climate iThe 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

20° 40° 60° 80°
28°
High: 35°F
Avg: 28°F
Low: 22°F
Jan
31°
High: 41°F
Avg: 31°F
Low: 21°F
Feb
38°
High: 51°F
Avg: 38°F
Low: 26°F
Mar
45°
High: 59°F
Avg: 45°F
Low: 32°F
Apr
54°
High: 69°F
Avg: 54°F
Low: 38°F
May
60°
High: 77°F
Avg: 60°F
Low: 44°F
Jun
67°
High: 86°F
Avg: 67°F
Low: 47°F
Jul
66°
High: 87°F
Avg: 66°F
Low: 45°F
Aug
58°
High: 76°F
Avg: 58°F
Low: 39°F
Sep
45°
High: 59°F
Avg: 45°F
Low: 32°F
Oct
34°
High: 42°F
Avg: 34°F
Low: 26°F
Nov
27°
High: 33°F
Avg: 27°F
Low: 21°F
Dec
32°F
28°F
Avg High Avg Temp Avg Low Light Frost (32°F) Hard Frost (28°F)

Precipitation

0" 1" 2" 3" 3.7"
2.5"
2.48"
Jan
2.4"
2.44"
Feb
2.8"
2.79"
Mar
2.7"
2.70"
Apr
3.6"
3.59"
May
3.7"
3.72"
Jun
3.1"
3.10"
Jul
3.6"
3.61"
Aug
3.0"
2.95"
Sep
2.5"
2.48"
Oct
2.7"
2.72"
Nov
2.9"
2.94"
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec8.5h10h11.5h13.5h15h15.5h15.5h14h12.5h10.5h9h8.5h
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 36m
Apr: 5:19 AM – 6:41 PM · 13h 23m
May: 4:33 AM – 7:27 PM · 14h 53m
Jun: 4:09 AM – 7:51 PM · 15h 43m
Jul: 4:19 AM – 7:41 PM · 15h 22m
Aug: 4:58 AM – 7:02 PM · 14h 03m
Sep: 5:50 AM – 6:10 PM · 12h 19m
Oct: 6:42 AM – 5:18 PM · 10h 36m
Nov: 7:28 AM – 4:32 PM · 9h 03m
Dec: 7:52 AM – 4:08 PM · 8h 17m
Daylight Longest: 15h 44m · Shortest: 8h 16m

Nearby Stations

Superior, MTMay 17 - September 23 Haugan 1 W, MT Thompson Falls Ph, MT May 7 - October 4 Mullan Pass Vor/Dme, ID June 10 - September 23 Alberton, MTMay 18 - September 25 Mullan, IDMay 12 - September 30

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