10-Day Weather Forecast - Lewistown, MT

Breezy. Mostly sunny. Highs 49 to 55. Southwest winds 5 to 15 mph increasing to 15 to 25 mph in the afternoon. Gusts up to 40 mph.

Much colder. Mostly clear in the evening then becoming mostly cloudy. Lows 11 to 17. Southwest winds 15 to 20 mph decreasing to 5 to 15 mph after midnight. Gusts up to 35 mph.

Windy. Much colder. Mostly cloudy. Snow likely in the morning then chance of snow in the afternoon. Highs 23 to 29. Temperatures falling into the mid single digits in the afternoon. Northwest winds 15 to 30 mph with gusts to around 45 mph. Chance of snow 70 percent.

Breezy colder. Mostly cloudy in the evening then becoming partly cloudy. Near steady temperature around 2. Northwest winds 15 to 25 mph shifting to the west 10 to 15 mph after midnight. Gusts up to 45 mph.

Mostly clear. Highs 18 to 24. Lows around 11.

Mostly clear. Highs 18 to 24. Lows around 11.

Not as cold. Mostly sunny. Highs 37 to 43.

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

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

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

Mostly cloudy with a 20 percent chance of rain and snow. Highs 36 to 42. Lows around 20.

Mostly cloudy with a 20 percent chance of rain and snow. Highs 36 to 42. Lows around 20.

Mostly cloudy. Highs 32 to 38.

Cloudy. Low temperature around 28F. Dew point will be around 20F with an average humidity of 66%. Winds will be 7 mph from the SW.

Cloudy with a slight chance of rain-snow mix. Chance of precipitation 25%. High temperature around 38F. Dew point will be around 22F with an average humidity of 61%. Winds will be 9 mph from the W.

Cloudy with a slight chance of snow. Chance of precipitation 25%. Low temperature around 21F. Dew point will be around 18F with an average humidity of 80%. Winds will be 8 mph from the W.

Cloudy with a slight chance of snow. Chance of precipitation 25%. High temperature around 31F. Dew point will be around 18F with an average humidity of 68%. Winds will be 9 mph from the W.

Cloudy. Low temperature around 19F. Dew point will be around 15F with an average humidity of 75%. Winds will be 9 mph from the SW.