Frost Dates for Terry 21 Nnw, MT

Elevation: 958 m

Frost Dates

Last Spring Frost (50%) May 26

First Fall Frost (50%) September 17

30% Probability

Last Spring Frost May 31

First Fall Frost September 11

Hard Freeze (28°F)

Last Spring Hard Freeze May 15

First Fall Hard Freeze September 27

47.07°N, 105.50°W © OpenStreetMap

Growing Season

114 Days May 26 to September 17

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°

17°

Jan

20°

Feb

31°

Mar

41°

Apr

51°

May

61°

Jun

68°

Jul

67°

Aug

57°

Sep

42°

Oct

30°

Nov

19°

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	28°	17°	7°
February	31°	20°	9°
March	43°	31°	19°
April	54°	41°	28°
May	65°	51°	38°
June	74°	61°	47°
July	83°	68°	53°
August	82°	67°	52°
September	71°	57°	42°
October	55°	42°	29°
November	41°	30°	18°
December	30°	19°	9°

Precipitation

0" 2" 4" 5.5"

1.7"

Jan

1.3"

Feb

2.0"

Mar

2.8"

Apr

4.5"

May

4.9"

Jun

5.1"

Jul

5.5"

Aug

3.5"

Sep

3.3"

Oct

2.2"

Nov

2.2"

Dec

Precipitation table

Average monthly precipitation (inches)
Month	Precipitation
January	1.7
February	1.3
March	2.0
April	2.8
May	4.5
June	4.9
July	5.1
August	5.5
September	3.5
October	3.3
November	2.2
December	2.2

Sunrise / Sunset

Jan: 7:39 AM – 4:21 PM · 8h 42m

Feb: 6:59 AM – 5:01 PM · 10h 02m

Mar: 6:12 AM – 5:48 PM · 11h 36m

Apr: 5:19 AM – 6:41 PM · 13h 22m

May: 4:34 AM – 7:26 PM · 14h 52m

Jun: 4:10 AM – 7:50 PM · 15h 41m

Jul: 4:20 AM – 7:40 PM · 15h 21m

Aug: 4:59 AM – 7:01 PM · 14h 02m

Sep: 5:50 AM – 6:10 PM · 12h 19m

Oct: 6:42 AM – 5:18 PM · 10h 36m

Nov: 7:28 AM – 4:32 PM · 9h 05m

Dec: 7:51 AM – 4:09 PM · 8h 19m

Daylight Longest: 15h 42m · Shortest: 8h 18m

Sunrise and sunset table

Sunrise, sunset, and daylight on the 15th of each month (local solar time)
Month	Sunrise	Sunset	Daylight
January	7:39 AM	4:21 PM	8h 42m
February	6:59 AM	5:01 PM	10h 02m
March	6:12 AM	5:48 PM	11h 36m
April	5:19 AM	6:41 PM	13h 22m
May	4:34 AM	7:26 PM	14h 52m
June	4:10 AM	7:50 PM	15h 41m
July	4:20 AM	7:40 PM	15h 21m
August	4:59 AM	7:01 PM	14h 02m
September	5:50 AM	6:10 PM	12h 19m
October	6:42 AM	5:18 PM	10h 36m
November	7:28 AM	4:32 PM	9h 05m
December	7:51 AM	4:09 PM	8h 19m

Nearby Stations

Terry, MTMay 12 - September 28 Brockway 3 Wsw, MT May 20 - September 19 Circle, MTMay 17 - September 22 Mildred 5 N, MT May 20 - September 22 Glendive, MTMay 3 - October 4 Rock Springs, MT May 15 - September 25

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