Roundup, Montana Climate

United States

Pop. 1,836 Elev. 979 m / 3,212 ft TZ: America/Denver (UTC-6) ·

Roundup experiences a wide climate range, from bitterly cold winters of 7°F (-14°C) in February to warm summers reaching 86°F (30°C) in August. Wind chill can push winter lows to 0°F (-18°C). Precipitation occurs on roughly 20 days per year (13.1 in / 334 mm total), with snow on 7 days and 48 in (1219 mm) of annual accumulation. The city averages 140 sunny days per year.

Temperature 86°F (30°C) high 7°F (-14°C) low
Feels like 87°F (31°C) high 0°F (-18°C) low
Rain 20 days 13.1 in (334 mm) /yr
Snow 7 days 48.0 in (1219 mm) /yr
Sky 140 sunny 9 stormy
Wind 3.6 mph (1.6 m/s) avg

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Monthly Climate Chart

↓ Monthly data table
Best months to visit: Aug, Sep, Oct

Sky & Air by Month

Cloud cover (%)
54
Jan
66
Feb
72
Mar
60
Apr
50
May
45
Jun
42
Jul
36
Aug
36
Sep
43
Oct
57
Nov
66
Dec
Humidity (%)
62
Jan
67
Feb
52
Mar
49
Apr
53
May
52
Jun
47
Jul
43
Aug
44
Sep
53
Oct
55
Nov
63
Dec

Weather Days by Month

↓ Weather days table

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Nearby Cities

Nearby

Commercial airport 44 mi Billings Logan International Airport (BIL)
Ski resort 95 mi Red Lodge Mountain
National park 83 mi Little Bighorn Battlefield National Monument
Mountain peak (5,611 ft) 32 mi Bald Butte
Hospital 1 mi Roundup Memorial Healthcare
Hiking trail 112 mi null

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Monthly Weather Data

↑ See chart
Month Avg High Avg Low Rainfall Snowfall Sunny Days
January 33°F 0°C 19°F -7°C 0.1 in 1 mm 10.6 in269 mm 11
February 22°F -6°C 7°F -14°C 0.1 in 2 mm 14.6 in371 mm 6
March 55°F 13°C 34°F 1°C 0.6 in 15 mm 3.6 in92 mm 3
April 60°F 15°C 36°F 2°C 1.3 in 33 mm 3.8 in96 mm 7
May 70°F 21°C 46°F 8°C 2.8 in 72 mm 0.0 in0 mm 13
June 77°F 25°C 52°F 11°C 2.7 in 68 mm 15
July 86°F 30°C 59°F 15°C 1.8 in 45 mm 18
August 86°F 30°C 59°F 15°C 1.0 in 25 mm 21
September 80°F 27°C 53°F 12°C 0.9 in 23 mm 19
October 60°F 16°C 40°F 4°C 1.4 in 35 mm 0.1 in1 mm 15
November 50°F 10°C 33°F 0°C 0.2 in 4 mm 3.0 in75 mm 6
December 42°F 5°C 24°F -4°C 0.4 in 11 mm 12.3 in313 mm 6

Weather Days by Month

↑ See chart
Month Sunny Days Storm Days
January 11 0
February 6 0
March 3 0
April 7 0
May 13 1
June 15 4
July 18 1
August 21 1
September 19 2
October 15 0
November 6 0
December 6 0