Frost Dates for Big Sky, MT

Based on data from Big Sky 2wnw weather station, 2 miles away

Frost Dates

This location has year-round freezing temperatures.

45.28°N, -111.37°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

Avg. annual minimum: −30 to −25°F (−34 to −32°C)

Learn more

Köppen Climate iThe Köppen climate classification system categorizes climates based on temperature and precipitation patterns.

Dfc Subarctic

Short, cool summers and long, very cold winters. Growing seasons of 3–4 months require fast-maturing varieties. Root vegetables, potatoes, and cold-hardy greens are the most reliable.

Köppen climate map

Temperature

0° 20° 40° 60° 80°
19°
High: 30°F
Avg: 19°F
Low: 9°F
Jan
22°
High: 34°F
Avg: 22°F
Low: 9°F
Feb
29°
High: 42°F
Avg: 29°F
Low: 17°F
Mar
35°
High: 48°F
Avg: 35°F
Low: 23°F
Apr
44°
High: 58°F
Avg: 44°F
Low: 30°F
May
51°
High: 67°F
Avg: 51°F
Low: 36°F
Jun
60°
High: 78°F
Avg: 60°F
Low: 41°F
Jul
58°
High: 77°F
Avg: 58°F
Low: 39°F
Aug
51°
High: 68°F
Avg: 51°F
Low: 33°F
Sep
39°
High: 53°F
Avg: 39°F
Low: 25°F
Oct
26°
High: 37°F
Avg: 26°F
Low: 16°F
Nov
18°
High: 28°F
Avg: 18°F
Low: 9°F
Dec
32°F
28°F
Avg High Avg Temp Avg Low Light Frost (32°F) Hard Frost (28°F)

Precipitation

0" 2" 4" 4.1"
2.7"
2.68"
Jan
2.7"
2.73"
Feb
2.8"
2.82"
Mar
3.6"
3.56"
Apr
4.1"
4.08"
May
3.6"
3.65"
Jun
2.6"
2.64"
Jul
2.9"
2.89"
Aug
2.8"
2.75"
Sep
3.4"
3.41"
Oct
3.0"
3.05"
Nov
2.3"
2.27"
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec9h10h11.5h13.5h14.5h15.5h15h14h12.5h10.5h9.5h8.5h
Jan: 7:33 AM – 4:27 PM · 8h 55m
Feb: 6:55 AM – 5:05 PM · 10h 10m
Mar: 6:11 AM – 5:49 PM · 11h 37m
Apr: 5:21 AM – 6:39 PM · 13h 17m
May: 4:40 AM – 7:20 PM · 14h 41m
Jun: 4:17 AM – 7:43 PM · 15h 26m
Jul: 4:26 AM – 7:34 PM · 15h 08m
Aug: 5:03 AM – 6:57 PM · 13h 55m
Sep: 5:51 AM – 6:09 PM · 12h 18m
Oct: 6:39 AM – 5:21 PM · 10h 41m
Nov: 7:22 AM – 4:38 PM · 9h 16m
Dec: 7:43 AM – 4:17 PM · 8h 33m
Daylight Longest: 15h 28m · Shortest: 8h 32m

Nearby Stations

Ennis, MTJune 16 - September 4 Norris Madison Pwr House, MT April 30 - October 10 Hebgen Dam, MT June 15 - September 10 Bozeman 6 W Exp Farm, MT May 23 - September 23 Bozeman Montana State Univ, MT May 26 - September 22 Virginia City, MT June 4 - September 18

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