10-Day Weather Forecast - Lewistown, MT

Sunny. Highs around 60. Southeast winds 5 to 10 mph with gusts to around 25 mph.

Not as cool. Partly cloudy in the evening then becoming mostly cloudy. Lows in the upper 30s. Southwest winds 5 to 15 mph. Gusts up to 25 mph increasing to 35 mph after midnight.

Partly sunny in the morning then clearing. Highs in the lower 60s. West winds 10 to 20 mph with gusts to around 35 mph.

Mostly clear in the evening then becoming mostly cloudy. Lows in the lower 40s. West winds 10 to 15 mph with gusts to around 35 mph.

Mostly cloudy. Highs in the lower 60s.

Mostly cloudy. A 20 percent chance of rain after midnight. Lows in the upper 30s.

Cooler cloudy. Chance of rain and snow in the morning then chance of snow and slight chance of rain in the afternoon. Highs in the upper 40s. Chance of precipitation 50 percent.

Colder. Mostly cloudy. A 20 percent chance of snow in the evening. Lows in the mid 20s.

Mostly cloudy. Highs in the lower 40s. Lows in the mid 20s.

Mostly cloudy. Highs in the lower 40s. Lows in the mid 20s.

Mostly sunny. Highs in the lower 40s.

Mostly cloudy. Lows in the mid 20s.

Sunny. Highs in the mid 40s.

Clear. Low temperature around 26F. Dew point will be around 16F with an average humidity of 58%. Winds will be 8 mph from the SW.

Mostly sunny. High temperature around 43F. Dew point will be around 18F with an average humidity of 42%. Winds will be 8 mph from the W.

Cloudy. Low temperature around 26F. Dew point will be around 18F with an average humidity of 62%. Winds will be 5 mph from the SW.

Cloudy. High temperature around 40F. Dew point will be around 22F with an average humidity of 55%. Winds will be 4 mph from the W.

Mostly cloudy with a slight chance of rain-snow mix. Chance of precipitation 25%. Low temperature around 22F. Dew point will be around 19F with an average humidity of 74%. Winds will be 3 mph from the SW.