Lewistown, MT Weather - Extended Forecast

Monday

Sunny

High:
84°F

A slight chance of showers between noon and 3pm, then a slight chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 84. South southwest wind 5 to 11 mph becoming north northwest in the afternoon. Winds could gust as high as 21 mph. Chance of precipitation is 20%.

Monday Night

Showers likely

Overnight low:
50°F

Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 50. North wind 7 to 13 mph becoming east northeast after midnight. Winds could gust as high as 22 mph. Chance of precipitation is 70%.

Tuesday

Showers likely

High:
64°F

Showers likely, with thunderstorms also possible after noon. Mostly cloudy, with a high near 64. East northeast wind 6 to 10 mph, with gusts as high as 20 mph.

Tuesday Night

Chance of thunderstorms

Overnight low:
45°F

A chance of showers and thunderstorms. Mostly cloudy, with a low around 45.

Wednesday

Chance of showers

High:
65°F

Wednesday Night

Partly cloudy

Overnight low:
45°F

Thursday

Mostly sunny

High:
78°F

Thursday Night

Slight chance of thunderstorms

Overnight low:
50°F

Friday

Mostly sunny

High:
83°F