Roundup, MT Climate

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

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for Roundup is 7.0 (10=best), which means it is one of the most pleasant places in Montana.

8.6 Summer - 5.2 Winter

June, September and August are the most pleasant months in Roundup, while January and December are the least comfortable months.

Climate	Roundup, Montana	United States
	14.1 in.	38.1 in.
	32.9 in.	27.8 in.
	73.8 days	106.2 days
	198 days	205 days
	88.1°	85.8°
	13.0°	21.7°
	7	7
	3.8	4.3
	3215 ft.	2443 ft.

Climate

YOU SHOULD KNOW

Many people confuse weather and climate but they are different. Weather is the conditions of the atmosphere over a short period of time, and climate is how the atmosphere is over long periods of time.

Weather is how the atmosphere is behaving and its effects upon life and human activities. Weather can change from minute-to-minute. Most people think of weather in terms of temperature, humidity, precipitation, cloudiness, brightness, visibility, wind, and atmospheric pressure.

Climate is the description of the long-term pattern of weather in a place. Climate can mean the average weather for a particular region and time period taken over 30 years. Climate is the average of weather over time.

July is the hottest month for Roundup with an average high temperature of 88.1°, which ranks it as one of the hottest places in Montana. In Roundup, there are 2 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Roundup are June, September and May.

In Roundup, there are 33.7 days annually when the high temperature is over 90°, which is one of the hottest places in Montana.

January has the coldest nighttime temperatures for Roundup with an average of 13.0°. This is about average compared to other places in Montana.

In Roundup, there are 172.8 days annually when the nighttime low temperature falls below freezing, which is about average compared to other places in Montana.

In Roundup, there are 17.5 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in Montana.

Humidity is low in Roundup, and some people might find the dryness to be uncomfortable. Days with noticeable humidity are rare throughout the year. A very dry climate can lead to cracked, itchy skin and dry eyes.

June is the wettest month in Roundup with 2.5 inches of rain, and the driest month is January with 0.4 inches. The wettest season is Autumn with 36% of yearly precipitation and 10% occurs in Spring, which is the driest season. The annual rainfall of 14.1 inches in Roundup means that it is about average compared to other places in Montana.

June is the rainiest month in Roundup with 10.3 days of rain, and November is the driest month with only 3.9 rainy days. There are 73.8 rainy days annually in Roundup, which is less rainy than most places in Montana. The rainiest season is Summer when it rains 31% of the time and the driest is Spring with only a 17% chance of a rainy day.

An annual snowfall of 32.9 inches in Roundup means that it is less snowy than most places in Montana. March is the snowiest month in Roundup with 6.6 inches of snow, and 8 months of the year have significant snowfall.