Frost Dates for Sonnette 7 Sw, MT

Elevation: 1193 m

Frost Dates

Last Spring Frost (50%) May 25

First Fall Frost (50%) September 19

30% Probability

Last Spring Frost May 31

First Fall Frost September 12

Hard Freeze (28°F)

Last Spring Hard Freeze May 14

First Fall Hard Freeze September 29

45.32°N, 105.91°W © OpenStreetMap

Growing Season

117 Days May 25 to September 19

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°

23°

Jan

25°

Feb

35°

Mar

43°

Apr

52°

May

62°

Jun

70°

Jul

69°

Aug

59°

Sep

45°

Oct

33°

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	37°	23°	10°
February	39°	25°	11°
March	49°	35°	21°
April	57°	43°	29°
May	67°	52°	38°
June	77°	62°	47°
July	87°	70°	53°
August	86°	69°	51°
September	75°	59°	42°
October	60°	45°	30°
November	47°	33°	18°
December	37°	24°	10°

Precipitation

0" 2" 4" 5.9"

2.8"

Jan

2.4"

Feb

3.5"

Mar

4.7"

Apr

5.3"

May

5.9"

Jun

4.6"

Jul

4.3"

Aug

4.2"

Sep

3.9"

Oct

2.9"

Nov

2.6"

Dec

Precipitation table

Average monthly precipitation (inches)
Month	Precipitation
January	2.8
February	2.4
March	3.5
April	4.7
May	5.3
June	5.9
July	4.6
August	4.3
September	4.2
October	3.9
November	2.9
December	2.6

Sunrise / Sunset

Jan: 7:33 AM – 4:27 PM · 8h 55m

Feb: 6:55 AM – 5:05 PM · 10h 09m

Mar: 6:11 AM – 5:49 PM · 11h 37m

Apr: 5:21 AM – 6:39 PM · 13h 17m

May: 4:39 AM – 7:21 PM · 14h 41m

Jun: 4:17 AM – 7:43 PM · 15h 27m

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

Sunrise and sunset table

Sunrise, sunset, and daylight on the 15th of each month (local solar time)
Month	Sunrise	Sunset	Daylight
January	7:33 AM	4:27 PM	8h 55m
February	6:55 AM	5:05 PM	10h 09m
March	6:11 AM	5:49 PM	11h 37m
April	5:21 AM	6:39 PM	13h 17m
May	4:39 AM	7:21 PM	14h 41m
June	4:17 AM	7:43 PM	15h 27m
July	4:26 AM	7:34 PM	15h 08m
August	5:03 AM	6:57 PM	13h 55m
September	5:51 AM	6:09 PM	12h 18m
October	6:39 AM	5:21 PM	10h 41m
November	7:22 AM	4:38 PM	9h 16m
December	7:43 AM	4:17 PM	8h 33m

Nearby Stations

Moorhead 9 Ne, MT May 17 - September 22 Broadus, MTMay 16 - September 28 Biddle 8 Sw, MT May 14 - September 28 Brandenberg, MT May 18 - September 22 Leiter 9n, WY May 14 - September 30 Colstrip, MTMay 15 - September 30

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