Stillwater County, MT Climate

Stillwater County has a semi-arid climate, with cold winters and mild summers. Temperatures range from an average of -3°F in winter to an average of 70°F during the hottest month of July. Precipitation is scarce, with an average of only 8.5 inches annually. During the summer months, typical weather includes sunny skies, low humidity levels and warm temperatures that are perfect for outdoor activities. In the winter, temperatures can get quite low and snowfall is common, but luckily snow rarely lingers on the ground for more than a few days at a time. Winters in Stillwater County also bring bright blue skies and plenty of sunshine which makes it a great place to enjoy outdoor activities even during the colder months.

Stillwater County, Montana gets 16 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Stillwater County averages 59 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 201 sunny days per year in Stillwater County. The US average is 205 sunny days.

Stillwater County gets some kind of precipitation, on average, 80 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 85 degrees
Winter Low: the January low is 16
Rain: averages 16 inches of rain a year
Snow: averages 59 inches of snow a year

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for Stillwater County is 6.8 (10=best), which means it is more comfortable than most places in Montana.

8.8 Summer - 5 Winter

August, July and June are the most pleasant months in Stillwater County, while December and January are the least comfortable months.

Climate	Stillwater, Montana	United States
	Unlock	38.1 in.
	59.2 in.	Unlock
	Unlock	106.2 days
	201 days	Unlock
	85.2°	85.8°
	Unlock	21.7°
	6.8	Unlock
	Unlock	4.3
	5055 ft.	Unlock

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 Stillwater County with an average high temperature of 85.2°, which ranks it as warmer than most places in Montana. In Stillwater County, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Stillwater County are June, September and August.

In Stillwater County, there are 20.8 days annually when the high temperature is over 90°, which is hotter than most places in Montana.

December has the coldest nighttime temperatures for Stillwater County with an average of 15.1°. This is warmer than most places in Montana.

In Stillwater County, there are 167.3 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Montana.

In Stillwater County, there are 15.2 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Montana.

Humidity is low in Stillwater County, 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.

May is the wettest month in Stillwater County with 2.9 inches of rain, and the driest month is January with 0.5 inches. The wettest season is Summer with 37% of yearly precipitation and 10% occurs in Spring, which is the driest season. The annual rainfall of 15.6 inches in Stillwater County means that it is wetter than most places in Montana.

June is the rainiest month in Stillwater County with 10.4 days of rain, and January is the driest month with only 4.3 rainy days. There are 79.9 rainy days annually in Stillwater County, which is less rainy than most places in Montana. The rainiest season is Summer when it rains 32% of the time and the driest is Spring with only a 17% chance of a rainy day.

An annual snowfall of 59.2 inches in Stillwater County means that it is snowier than most places in Montana. March is the snowiest month in Stillwater County with 11.0 inches of snow, and 9 months of the year have significant snowfall.

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