Frost Dates for Brady 27 Ene (The Knees), 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 13
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 29
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 20
First Fall Frost September 24

Hard Freeze (28°F / -2°C)

Last Spring Hard Freeze May 2
First Fall Hard Freeze October 6
48.08°N, -111.26°W © OpenStreetMap

Growing Season

139 Days May 13 to September 29

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° 90°
24°
High: 32°
Avg: 24°
Low: 15°
Jan
26°
High: 37°
Avg: 26°
Low: 16°
Feb
33°
High: 44°
Avg: 33°
Low: 23°
Mar
44°
High: 55°
Avg: 44°
Low: 32°
Apr
52°
High: 64°
Avg: 52°
Low: 41°
May
60°
High: 72°
Avg: 60°
Low: 48°
Jun
68°
High: 83°
Avg: 68°
Low: 54°
Jul
68°
High: 83°
Avg: 68°
Low: 53°
Aug
59°
High: 72°
Avg: 59°
Low: 45°
Sep
46°
High: 58°
Avg: 46°
Low: 35°
Oct
36°
High: 45°
Avg: 36°
Low: 26°
Nov
26°
High: 34°
Avg: 26°
Low: 18°
Dec
32°F
28°F
Avg High Avg Temp Avg Low Light Frost (32°F) Hard Frost (28°F)

Precipitation

0" 1" 2" 3" 3.5"
1.9"
1.95"
Jan
1.4"
1.40"
Feb
1.7"
1.71"
Mar
2.1"
2.12"
Apr
3.1"
3.09"
May
3.5"
3.45"
Jun
3.1"
3.08"
Jul
3.4"
3.42"
Aug
3.4"
3.44"
Sep
3.0"
3.03"
Oct
2.0"
2.04"
Nov
2.0"
1.97"
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec9h10h12h13h15h16h15h14h12h11h9h8h
Jan: 7:43 AM – 4:17 PM · 8h 34m
Feb: 7:01 AM – 4:59 PM · 9h 58m
Mar: 6:13 AM – 5:47 PM · 11h 35m
Apr: 5:17 AM – 6:43 PM · 13h 25m
May: 4:31 AM – 7:29 PM · 14h 58m
Jun: 4:05 AM – 7:55 PM · 15h 49m
Jul: 4:16 AM – 7:44 PM · 15h 28m
Aug: 4:57 AM – 7:03 PM · 14h 07m
Sep: 5:50 AM – 6:10 PM · 12h 20m
Oct: 6:43 AM – 5:17 PM · 10h 33m
Nov: 7:31 AM – 4:29 PM · 8h 58m
Dec: 7:55 AM – 4:05 PM · 8h 10m
Daylight Longest: 15h 51m · Shortest: 8h 09m

Nearby Stations

Tiber Dam, MT May 16 - September 23 Carter 14 W, MT May 23 - September 23 Ft Benton, MT May 15 - September 22 Conrad, MTMay 20 - September 19 Chester, MTMay 24 - September 17 Rudyard 19s, MT May 23 - September 19

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