Montana Weather & Climate: Best Time to Visit

In Montana, temperatures differ significantly between summer and winter months. On average, daytime temperatures range from a pleasant 19°C (66°F) in July to a very cold -4°C (25°F) in January.

Nighttime temperatures range from 7°C (45°F) in July to -13°C (9°F) in January.

Check out our detailed temperature page for more information.

Temperature ranges by month

Montana experiences significant rain/snowfall throughout the year, averaging 1598 mm (63 in) of precipitation annually. The wettest period in Montana occurs in June, which receives around 158 mm (6.2 in) of precipitation. During the driest month, October, Montana experiences high rainfall, totaling 112 mm (4.4 in). The consistent precipitation levels throughout the year contribute to a relatively stable climate. For more details, please visit our Montana Precipitation page.

The mean monthly precipitation over the year, including rain, hail, and snow

The average number of days each month with precipitation

In Montana, summer days are longer and more sunny, with daily sunshine hours peaking at 9.0 hours in July. As the darker season arrives, the brightness of the sun becomes less. December sees a soft sun for only 2.3 hours per average day.

Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Daily hours of sunshine

Daily percentage of sunshine

The relative humidity is high throughout the year in Montana.

The city experiences its highest humidity in December, reaching 83%. In April, the humidity drops to its lowest level at 59%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year

The average wind speed over the year ranges from 1 m/s (2 knots) to 2 m/s (4 knots). It is lower in January, October, November and December and higher in February, March, April, May, June, July, August and September. What does this mean?

The mean monthly wind speed over the year (meters per second)