Roundup, MT has a semi-arid climate with warm summers and cold winters. The temperatures range from about 30-90 degrees Fahrenheit, with the average high temperature in summer being around 85 degrees and the average low temperature in winter being around 15 degrees. Precipitation is generally light throughout the year, averaging around 12 inches annually. Snowfall is common between the months of October to March, although it can occasionally happen outside these months as well. Winters can be quite cold due to the dry air that comes with this region's climate, so it is important to bundle up when venturing outdoors during winter months!
Roundup, Montana gets 14 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Roundup averages 33 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 198 sunny days per year in Roundup. The US average is 205 sunny days.
Roundup gets some kind of precipitation, on average, 74 days per year. Precipitation is rain, snow, sleet, or hail that falls to the ground. In order for precipitation to be counted you have to get at least .01 inches on the ground to measure.
Weather Highlights
Summer High: the July high is around 88 degrees
Winter Low: the January low is 13
Rain: averages 14 inches of rain a year
Snow: averages 33 inches of snow a year