Frost Dates for Potomac, MT

Frost Dates

This location has year-round freezing temperatures.

46.88°N, -113.56°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 4a

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Temperature

0° 30° 60° 90°
19°
High: 30°
Avg: 19°
Low: 8°
Jan
22°
High: 35°
Avg: 22°
Low: 9°
Feb
32°
High: 46°
Avg: 32°
Low: 18°
Mar
39°
High: 54°
Avg: 39°
Low: 24°
Apr
47°
High: 64°
Avg: 47°
Low: 30°
May
55°
High: 71°
Avg: 55°
Low: 38°
Jun
61°
High: 82°
Avg: 61°
Low: 41°
Jul
60°
High: 82°
Avg: 60°
Low: 39°
Aug
52°
High: 71°
Avg: 52°
Low: 32°
Sep
39°
High: 55°
Avg: 39°
Low: 23°
Oct
28°
High: 39°
Avg: 28°
Low: 16°
Nov
19°
High: 29°
Avg: 19°
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"
3.4"
3.41"
Jan
3.1"
3.08"
Feb
3.5"
3.50"
Mar
4.2"
4.16"
Apr
4.7"
4.65"
May
3.8"
3.77"
Jun
2.8"
2.77"
Jul
3.8"
3.75"
Aug
3.3"
3.29"
Sep
3.0"
3.02"
Oct
3.4"
3.44"
Nov
3.4"
3.37"
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec9h10h12h13h15h16h15h14h12h11h9h8h
Jan: 7:38 AM – 4:22 PM · 8h 44m
Feb: 6:58 AM – 5:02 PM · 10h 03m
Mar: 6:12 AM – 5:48 PM · 11h 36m
Apr: 5:19 AM – 6:41 PM · 13h 22m
May: 4:35 AM – 7:25 PM · 14h 50m
Jun: 4:10 AM – 7:50 PM · 15h 39m
Jul: 4:20 AM – 7:40 PM · 15h 19m
Aug: 4:59 AM – 7:01 PM · 14h 01m
Sep: 5:51 AM – 6:09 PM · 12h 19m
Oct: 6:42 AM – 5:18 PM · 10h 37m
Nov: 7:27 AM – 4:33 PM · 9h 06m
Dec: 7:50 AM – 4:10 PM · 8h 21m
Daylight Longest: 15h 41m · Shortest: 8h 19m

Nearby Stations

Missoula 2 Ne, MT May 10 - October 1 Seeley Lake Rs, MT Ovando 9 Sse, MT Drummond Aviation, MT Missoula 6 Nw Wfo, MT May 6 - October 4 Missoula Intl AP, MT May 16 - September 26

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