Frost Dates for Glasgow, MT

Based on data from Glasgow #2 weather station, 0 miles away

Elevation: 2093 ft

Frost Dates

Last Spring Frost (50%) May 3

First Fall Frost (50%) October 1

30% Probability

Last Spring Frost May 8

First Fall Frost September 26

Hard Freeze (28°F)

Last Spring Hard Freeze April 23

First Fall Hard Freeze October 11

48.20°N, 106.64°W © OpenStreetMap

Growing Season

151 Days May 3 to October 1

USDA Hardiness Zone

Zone 4a

Avg. annual minimum: −30 to −25°F

Learn more

Köppen Climate

BSk Cold Semi-Arid (Steppe)

Cool to cold with low rainfall and wide temperature swings. Common in the western Great Plains and central Asia. Short growing seasons benefit from season extension techniques.

Köppen climate map

Temperature

0° 30° 60° 90°

14°

Jan

19°

Feb

32°

Mar

46°

Apr

57°

May

66°

Jun

73°

Jul

71°

Aug

60°

Sep

45°

Oct

30°

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	25°	14°	4°
February	30°	19°	8°
March	44°	32°	21°
April	59°	46°	33°
May	70°	57°	44°
June	78°	66°	53°
July	87°	73°	59°
August	85°	71°	57°
September	73°	60°	46°
October	57°	45°	33°
November	40°	30°	19°
December	28°	18°	8°

Precipitation

0" 1" 2" 3" 3.0"

0.9"

Jan

0.8"

Feb

1.3"

Mar

2.1"

Apr

2.8"

May

3.0"

Jun

2.7"

Jul

2.5"

Aug

2.1"

Sep

1.7"

Oct

1.1"

Nov

0.9"

Dec

Precipitation table

Average monthly precipitation (inches)
Month	Precipitation
January	0.9
February	0.8
March	1.3
April	2.1
May	2.8
June	3.0
July	2.7
August	2.5
September	2.1
October	1.7
November	1.1
December	0.9

Sunrise / Sunset

Jan: 7:59 AM – 4:33 PM · 8h 34m

Feb: 7:22 AM – 5:20 PM · 9h 57m

Mar: 7:29 AM – 7:04 PM · 11h 35m

Apr: 6:24 AM – 7:50 PM · 13h 25m

May: 5:33 AM – 8:32 PM · 14h 59m

Jun: 5:12 AM – 9:02 PM · 15h 50m

Jul: 5:28 AM – 8:57 PM · 15h 29m

Aug: 6:07 AM – 8:14 PM · 14h 07m

Sep: 6:51 AM – 7:11 PM · 12h 20m

Oct: 7:35 AM – 6:08 PM · 10h 33m

Nov: 7:23 AM – 4:20 PM · 8h 57m

Dec: 7:58 AM – 4:07 PM · 8h 09m

Daylight Mountain Time (MT) Longest: 15h 52m · Shortest: 8h 08m

Sunrise and sunset table

Sunrise, sunset, and daylight on the 15th of each month (Mountain Time (MT))
Month	Sunrise	Sunset	Daylight
January	7:59 AM	4:33 PM	8h 34m
February	7:22 AM	5:20 PM	9h 57m
March	7:29 AM	7:04 PM	11h 35m
April	6:24 AM	7:50 PM	13h 25m
May	5:33 AM	8:32 PM	14h 59m
June	5:12 AM	9:02 PM	15h 50m
July	5:28 AM	8:57 PM	15h 29m
August	6:07 AM	8:14 PM	14h 07m
September	6:51 AM	7:11 PM	12h 20m
October	7:35 AM	6:08 PM	10h 33m
November	7:23 AM	4:20 PM	8h 57m
December	7:58 AM	4:07 PM	8h 09m

Nearby Stations

Glasgow Intl AP, MT May 6 - September 30 Nashua #2, MT May 12 - September 24 St Marie, MTMay 13 - September 27 Ft Peck Pwr Plt, MT May 8 - October 1 Hinsdale 4 Sw, MT May 15 - September 26 Opheim 12 Sse, MT June 5 - September 2

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