Frost Dates for Big Sky, MT

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

Elevation: 7218 ft

Frost Dates

This location has year-round freezing temperatures.

45.28°N, 111.37°W © OpenStreetMap

USDA Hardiness Zone

Zone 4a

Avg. annual minimum: −30 to −25°F

Learn more

Köppen Climate

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°

Jan

22°

Feb

29°

Mar

35°

Apr

44°

May

51°

Jun

60°

Jul

58°

Aug

51°

Sep

39°

Oct

26°

Nov

18°

Dec

32°F

28°F

Avg High Avg Temp Avg Low Light Frost (32°F) Hard Frost (28°F)

Temperature table

Average monthly temperatures (°F)
Month	Avg High	Avg Temp	Avg Low
January	30°	19°	9°
February	34°	22°	9°
March	42°	29°	17°
April	48°	35°	23°
May	58°	44°	30°
June	67°	51°	36°
July	78°	60°	41°
August	77°	58°	39°
September	68°	51°	33°
October	53°	39°	25°
November	37°	26°	16°
December	28°	18°	9°

Precipitation

0" 2" 4" 4.1"

2.7"

Jan

2.7"

Feb

2.8"

Mar

3.6"

Apr

4.1"

May

3.6"

Jun

2.6"

Jul

2.9"

Aug

2.8"

Sep

3.4"

Oct

3.0"

Nov

2.3"

Dec

Precipitation table

Average monthly precipitation (inches)
Month	Precipitation
January	2.7
February	2.7
March	2.8
April	3.6
May	4.1
June	3.6
July	2.6
August	2.9
September	2.8
October	3.4
November	3.0
December	2.3

Sunrise / Sunset

Jan: 8:07 AM – 5:02 PM · 8h 55m

Feb: 7:35 AM – 5:45 PM · 10h 10m

Mar: 7:46 AM – 7:24 PM · 11h 37m

Apr: 6:47 AM – 8:04 PM · 13h 17m

May: 6:01 AM – 8:42 PM · 14h 41m

Jun: 5:42 AM – 9:09 PM · 15h 26m

Jul: 5:57 AM – 9:05 PM · 15h 08m

Aug: 6:32 AM – 8:27 PM · 13h 55m

Sep: 7:11 AM – 7:29 PM · 12h 18m

Oct: 7:50 AM – 6:31 PM · 10h 41m

Nov: 7:33 AM – 4:48 PM · 9h 16m

Dec: 8:04 AM – 4:38 PM · 8h 33m

Daylight Mountain Time (MT) Longest: 15h 28m · Shortest: 8h 32m

Sunrise and sunset table

Sunrise, sunset, and daylight on the 15th of each month (Mountain Time (MT))
Month	Sunrise	Sunset	Daylight
January	8:07 AM	5:02 PM	8h 55m
February	7:35 AM	5:45 PM	10h 10m
March	7:46 AM	7:24 PM	11h 37m
April	6:47 AM	8:04 PM	13h 17m
May	6:01 AM	8:42 PM	14h 41m
June	5:42 AM	9:09 PM	15h 26m
July	5:57 AM	9:05 PM	15h 08m
August	6:32 AM	8:27 PM	13h 55m
September	7:11 AM	7:29 PM	12h 18m
October	7:50 AM	6:31 PM	10h 41m
November	7:33 AM	4:48 PM	9h 16m
December	8:04 AM	4:38 PM	8h 33m

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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