Frost Dates for Trout Creek Rs, 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 20
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 28
First Fall Frost September 12

Hard Freeze (28°F / -2°C)

Last Spring Hard Freeze May 1
First Fall Hard Freeze October 8
47.87°N, -115.63°W © OpenStreetMap

Growing Season

124 Days May 20 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 6a

Learn more

Temperature

20° 40° 60° 80°
28°
High: 34°
Avg: 28°
Low: 22°
Jan
31°
High: 39°
Avg: 31°
Low: 23°
Feb
38°
High: 48°
Avg: 38°
Low: 28°
Mar
45°
High: 58°
Avg: 45°
Low: 32°
Apr
54°
High: 68°
Avg: 54°
Low: 39°
May
60°
High: 74°
Avg: 60°
Low: 45°
Jun
67°
High: 85°
Avg: 67°
Low: 49°
Jul
66°
High: 85°
Avg: 66°
Low: 47°
Aug
58°
High: 74°
Avg: 58°
Low: 41°
Sep
46°
High: 58°
Avg: 46°
Low: 35°
Oct
35°
High: 41°
Avg: 35°
Low: 29°
Nov
28°
High: 33°
Avg: 28°
Low: 22°
Dec
32°F
28°F
Avg High Avg Temp Avg Low Light Frost (32°F) Hard Frost (28°F)

Precipitation

0" 2" 4" 4.9"
3.6"
3.60"
Jan
2.7"
2.74"
Feb
2.9"
2.91"
Mar
2.6"
2.61"
Apr
3.8"
3.83"
May
4.1"
4.13"
Jun
3.3"
3.31"
Jul
3.0"
3.03"
Aug
3.5"
3.55"
Sep
4.9"
4.90"
Oct
4.0"
3.99"
Nov
3.7"
3.72"
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec9h10h12h13h15h16h15h14h12h11h9h8h
Jan: 7:42 AM – 4:18 PM · 8h 36m
Feb: 7:01 AM – 4:59 PM · 9h 59m
Mar: 6:12 AM – 5:48 PM · 11h 35m
Apr: 5:18 AM – 6:42 PM · 13h 24m
May: 4:32 AM – 7:28 PM · 14h 57m
Jun: 4:06 AM – 7:54 PM · 15h 48m
Jul: 4:17 AM – 7:43 PM · 15h 27m
Aug: 4:57 AM – 7:03 PM · 14h 06m
Sep: 5:50 AM – 6:10 PM · 12h 20m
Oct: 6:43 AM – 5:17 PM · 10h 34m
Nov: 7:30 AM – 4:30 PM · 8h 59m
Dec: 7:54 AM – 4:06 PM · 8h 12m
Daylight Longest: 15h 49m · Shortest: 8h 11m

Nearby Stations

Libby 32 Sse, MT Prichard 3 Ese, ID May 31 - September 5 Thompson Falls Ph, MT May 7 - October 4 Heron 2 Nw, MT May 20 - September 20 Cabinet Gorge, ID May 9 - October 8 Mullan Pass Vor/Dme, ID June 10 - September 23

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