10-Day Weather Forecast - Lewistown, MT

Mostly sunny. Highs in the lower 60s. West winds 10 to 20 mph with gusts to around 35 mph.

Partly cloudy in the evening then becoming mostly cloudy. Lows in the lower 40s. West winds 5 to 15 mph. Gusts up to 30 mph in the evening.

Mostly cloudy. A 50 percent chance of rain in the afternoon. Highs around 60. Southwest winds 5 to 15 mph.

Rain in the evening then rain and slight chance of snow after midnight. Lows in the lower 30s. North winds 5 to 10 mph shifting to the northwest 10 to 20 mph with gusts to around 35 mph after midnight. Chance of precipitation 90 percent.

Windy. Much colder. Partly sunny with a 50 percent chance of snow. Highs in the upper 30s.

Colder. Mostly cloudy with a 20 percent chance of snow in the evening then partly cloudy after midnight. Lows around 20.

Partly cloudy. A 20 percent chance of snow. Highs in the mid 40s. Lows in the mid 20s.

Partly cloudy. A 20 percent chance of snow. Highs in the mid 40s. Lows in the mid 20s.

Mostly clear. Highs in the mid 50s. Lows around 30.

Mostly clear. Highs in the mid 50s. Lows around 30.

Warmer sunny. Highs in the mid 60s.

Partly cloudy. Lows around 40. Highs in the lower 70s.

Partly cloudy. Lows around 40. Highs in the lower 70s.

Mostly cloudy with a slight chance of rain. Chance of precipitation 25%. Low temperature around 38F. Dew point will be around 33F with an average humidity of 67%. Winds will be 5 mph from the W.

Mostly cloudy with a chance of rain. Chance of precipitation 35%. High temperature around 55F. Dew point will be around 33F with an average humidity of 54%. Winds will be 8 mph from the NW.

Mostly cloudy with a slight chance of rain. Chance of precipitation 30%. Low temperature around 35F. Dew point will be around 32F with an average humidity of 72%. Winds will be 5 mph from the W.

Mostly cloudy with a chance of rain. Chance of precipitation 35%. High temperature around 50F. Dew point will be around 33F with an average humidity of 63%. Winds will be 8 mph from the NW.

Cloudy with a slight chance of rain. Chance of precipitation 25%. Low temperature around 33F. Dew point will be around 30F with an average humidity of 74%. Winds will be 4 mph from the NW.