Frost Dates for Bozeman, MT

Based on data from Bozeman Montana State Univ weather station, 1 miles away

Elevation: 4816 ft

Frost Dates

Last Spring Frost (50%) May 26

First Fall Frost (50%) September 22

30% Probability

Last Spring Frost June 3

First Fall Frost September 16

Hard Freeze (28°F)

Last Spring Hard Freeze May 8

First Fall Hard Freeze October 3

45.68°N, 111.04°W © OpenStreetMap

Growing Season

119 Days May 26 to September 22

USDA Hardiness Zone

Zone 5a

Avg. annual minimum: −20 to −15°F

Learn more

Köppen Climate

Dfb Warm-Summer Continental

Warm summers and cold, snowy winters. A shorter growing season than hot-summer continental. Hardy vegetables, root crops, and cool-season greens do well. Season extension is valuable.

Köppen climate map

Temperature

10° 30° 50° 70° 90°

25°

Jan

27°

Feb

35°

Mar

43°

Apr

51°

May

59°

Jun

67°

Jul

66°

Aug

57°

Sep

45°

Oct

32°

Nov

24°

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	34°	25°	15°
February	37°	27°	17°
March	46°	35°	24°
April	55°	43°	31°
May	63°	51°	39°
June	72°	59°	46°
July	82°	67°	52°
August	81°	66°	50°
September	71°	57°	42°
October	57°	45°	32°
November	42°	32°	22°
December	33°	24°	15°

Precipitation

0" 1" 2" 3" 3.4"

1.2"

Jan

1.4"

Feb

2.1"

Mar

3.0"

Apr

3.4"

May

2.9"

Jun

1.9"

Jul

1.9"

Aug

2.5"

Sep

2.3"

Oct

1.7"

Nov

1.3"

Dec

Precipitation table

Average monthly precipitation (inches)
Month	Precipitation
January	1.2
February	1.4
March	2.1
April	3.0
May	3.4
June	2.9
July	1.9
August	1.9
September	2.5
October	2.3
November	1.7
December	1.3

Sunrise / Sunset

Jan: 8:07 AM – 4:60 PM · 8h 52m

Feb: 7:35 AM – 5:43 PM · 10h 08m

Mar: 7:45 AM – 7:22 PM · 11h 37m

Apr: 6:45 AM – 8:04 PM · 13h 18m

May: 5:59 AM – 8:42 PM · 14h 43m

Jun: 5:40 AM – 9:09 PM · 15h 29m

Jul: 5:55 AM – 9:05 PM · 15h 10m

Aug: 6:30 AM – 8:27 PM · 13h 56m

Sep: 7:10 AM – 7:28 PM · 12h 18m

Oct: 7:49 AM – 6:29 PM · 10h 40m

Nov: 7:33 AM – 4:46 PM · 9h 13m

Dec: 8:05 AM – 4:35 PM · 8h 30m

Daylight Mountain Time (MT) Longest: 15h 31m · Shortest: 8h 29m

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	4:60 PM	8h 52m
February	7:35 AM	5:43 PM	10h 08m
March	7:45 AM	7:22 PM	11h 37m
April	6:45 AM	8:04 PM	13h 18m
May	5:59 AM	8:42 PM	14h 43m
June	5:40 AM	9:09 PM	15h 29m
July	5:55 AM	9:05 PM	15h 10m
August	6:30 AM	8:27 PM	13h 56m
September	7:10 AM	7:28 PM	12h 18m
October	7:49 AM	6:29 PM	10h 40m
November	7:33 AM	4:46 PM	9h 13m
December	8:05 AM	4:35 PM	8h 30m

Nearby Stations

Bozeman 6 W Exp Farm, MT May 23 - September 23 Bozeman Gallatin Fld, MT May 26 - September 16 Logan Landfill, MT May 26 - September 15 Livingston 12 S, MT May 19 - September 25 Trident, MTMay 9 - September 27 Livingston Mission Fld, MT May 27 - September 14

Plan Your Garden with Planter

Now that you know your frost dates, use Planter to plan your veggie garden! Planter is an easy drag-and-drop garden planner with personalized planting schedules.

Try Planter For Free

Available everywhere: iOS, Android, web, and more!