Severe Thunderstorms and Flash Flooding Possible Through the Holiday Weekend

Severe thunderstorms, heavy rainfall, and additional flash flooding will remain possible across much of the central U.S. and into parts of the Ohio Valley and Mid Atlantic through Monday. Elsewhere, cool and unsettled weather will persist over the West, while record high temperatures are expected in the Southeast. Read More >

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Current conditions at

Lewistown, Lewistown Municipal Airport (KLWT)

Lat: 47.04917°NLon: 109.46639°WElev: 4167ft.

Overcast

50°F

10°C

Humidity	77%
Wind Speed	ESE 5 MPH
Barometer	29.95 in (1013.5 mb)
Dewpoint	43°F (6°C)
Visibility	10.00 mi
Wind Chill	48°F (9°C)
Last update	26 May 12:54 am MDT

More Information:

Local Forecast Office More Local Wx 3 Day History Mobile Weather Hourly Weather Forecast

Extended Forecast for

Lewistown MT

Overnight

Rain Likely
Low: 43 °F
Sunday

Showers
Likely
High: 59 °F
Sunday
Night

Showers
Low: 41 °F
Memorial
Day

Rain Likely
High: 53 °F
Monday
Night

Chance Rain
then Mostly
Cloudy
Low: 37 °F
Tuesday

Mostly Sunny
High: 63 °F
Tuesday
Night

Mostly Clear
Low: 40 °F
Wednesday

Mostly Sunny
then Slight
Chance
T-storms
High: 68 °F
Wednesday
Night

Slight Chance
T-storms then
Partly Cloudy
Low: 45 °F

Detailed Forecast

Overnight

Rain likely, mainly after 5am. Mostly cloudy, with a low around 43. East wind 5 to 7 mph. Chance of precipitation is 60%.

Sunday

Rain likely before noon, then a chance of showers and thunderstorms between noon and 4pm, then showers likely and possibly a thunderstorm after 4pm. Mostly cloudy, with a high near 59. East wind 6 to 15 mph, with gusts as high as 26 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Sunday Night

Showers and possibly a thunderstorm, mainly before midnight, then rain after midnight. Low around 41. Northeast wind 9 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Memorial Day

Rain likely. Cloudy, with a high near 53. Northeast wind 8 to 10 mph. Chance of precipitation is 60%.

Monday Night

A 30 percent chance of rain before midnight. Mostly cloudy, with a low around 37. Northeast wind 5 to 10 mph becoming light and variable.

Tuesday

Mostly sunny, with a high near 63.

Tuesday Night

Mostly clear, with a low around 40.

Wednesday

A slight chance of showers and thunderstorms after noon. Mostly sunny, with a high near 68.

Wednesday Night

A slight chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 45.