Montana Weather by Month — Temperature & Rainfall Guide

Montana is a region in the United States of America. Many people wonder what the weather conditions are in Montana over the year. What is the best time to visit Montana?

This page shows the average weather conditions by month in Montana over the year in: January, February, March, April, May, June, July, August, September, October, November, December.

In January the weather in Montana is generally less favorable. January is a winter month. The temperatures range from very low in West Yellowstone with -3°C (27°F) to low in Columbus with 5°C (41°F). It is a very cold month in some areas, so be prepared and make sure to dress up warm.

Find more detailed climate information for Montana in January here.

In February the weather in Montana is generally less favorable. February is a winter month. The temperatures range from very low in Sidney with -2°C (28°F) to low in Hamilton with 5°C (41°F). It is a very cold month in some areas, so be prepared and make sure to dress up warm.

Find more detailed climate information for Montana in February here.

In March the weather in Montana ranges from less favorable in Whitefish to good in Billings. The temperatures range from low in Big Sky with 4°C (39°F) to moderate in Hardin with 13°C (55°F).

Find more detailed climate information for Montana in March here.

In April the weather in Montana ranges from mixed in Whitefish to good in Billings. The temperatures range from low in Big Sky with 8°C (46°F) to moderate in Hardin with 17°C (63°F).

Find more detailed climate information for Montana in April here.

In May the weather in Montana ranges from mixed in Red Lodge to excellent in Billings. The temperatures range from moderate in Big Sky with 13°C (55°F) to pleasant in Hardin with 22°C (72°F).

Find more detailed climate information for Montana in May here.

In June the weather in Montana is generally excellent. June is a summer month. The temperatures range from pleasant in Big Sky with 18°C (64°F) to high in Hardin with 28°C (82°F).

Find more detailed climate information for Montana in June here.

In July the weather in Montana ranges from very good in Hardin to excellent in Whitefish. July is a summer month. The temperatures range from high in Big Sky with 24°C (75°F) to very high in Hardin with 34°C (93°F). On average, this month is one of the warmest months of the year in Montana. So be prepared and make sure to dress lightly.

Find more detailed climate information for Montana in July here.

In August the weather in Montana is generally excellent. August is a summer month. The temperatures range from high in Big Sky with 23°C (73°F) to very high in Hardin with 32°C (90°F).

Find more detailed climate information for Montana in August here.

In September the weather in Montana is generally excellent. The temperatures range from pleasant in Big Sky with 19°C (66°F) to high in Hardin with 27°C (81°F).

Find more detailed climate information for Montana in September here.

In October the weather in Montana ranges from mixed in Whitefish to very good in Helena. The temperatures range from low in Big Sky with 10°C (50°F) to moderate in Hardin with 18°C (64°F).

Find more detailed climate information for Montana in October here.

In November the weather in Montana ranges from less favorable in Whitefish to mixed in Billings. The average maximum daytime temperatures are low and range from 2°C (36°F) in Big Sky to 10°C (50°F) in Hardin. It is a very cold month in some areas, so be prepared and make sure to dress up warm.

Find more detailed climate information for Montana in November here.

In December the weather in Montana is generally less favorable. December is a winter month. The temperatures range from very low in West Yellowstone with -3°C (27°F) to low in Billings with 2°C (36°F). On average, this month is one of the coldest months of the year in Montana. So be prepared and make sure to dress up warm.

Find more detailed climate information for Montana in December here.