National Weather Service

News Headlines

SCN26-50: Discontinuation of the State Forecast Product (SFP) for all NWS Central Region, Southern Region, and Western Region Offices: Effective June 29, 2026
The Regional Temperatures and Precipitation Product for the State of Montana (RTPMT) will now be discontinued on July 7, 2026.

Current conditions at

ROCKY BOY (RCBM8)

Lat: 48.25529°NLon: 109.78592°WElev: 3789.0ft.

64°F

18°C

Humidity	47%
Wind Speed	SW 6 MPH
Barometer	NA
Dewpoint	43°F (6°C)
Visibility	NA
Last update	16 Jun 05:18 AM MDT

More Information:

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

Extended Forecast for

4 Miles SW Box Elder MT

Today
High: 85 °F
Partly Sunny
then Chance
T-storms and
Breezy
Tonight
Low: 48 °F
Showers
Likely and
Breezy then
Chance
Showers
Wednesday
High: 69 °F
Mostly Sunny
then Chance
Showers
Wednesday Night
Low: 44 °F
Slight Chance
Showers then
Partly Cloudy
Thursday
High: 71 °F
Chance
Showers
Thursday Night
Low: 45 °F
Partly Cloudy
Juneteenth
High: 77 °F
Sunny
Friday Night
Low: 51 °F
Partly Cloudy
Saturday
High: 80 °F
Partly Sunny

Detailed Forecast

Today

A 40 percent chance of showers and thunderstorms, mainly after 4pm. Mostly cloudy, then gradually becoming sunny, with a high near 85. Breezy, with a west wind 7 to 12 mph increasing to 19 to 24 mph in the afternoon. Winds could gust as high as 44 mph.

Tonight

Showers and thunderstorms likely before 1am, then a slight chance of showers between 1am and 3am. Mostly cloudy, with a low around 48. Breezy, with a west wind 17 to 22 mph decreasing to 8 to 13 mph after midnight. Winds could gust as high as 43 mph. Chance of precipitation is 60%.

Wednesday

A chance of showers, with thunderstorms also possible after 3pm. Partly sunny, with a high near 69. West northwest wind 9 to 16 mph, with gusts as high as 33 mph. Chance of precipitation is 30%.

Wednesday Night

A 20 percent chance of showers before midnight. Partly cloudy, with a low around 44. North northwest wind 8 to 13 mph becoming light and variable after midnight. Winds could gust as high as 23 mph.

Thursday

A 30 percent chance of showers, mainly before noon. Mostly sunny, with a high near 71. Calm wind becoming northwest around 5 mph in the afternoon.

Thursday Night

Partly cloudy, with a low around 45. North wind around 5 mph becoming calm in the evening.

Juneteenth

Sunny, with a high near 77. Northeast wind 3 to 6 mph.

Friday Night

Partly cloudy, with a low around 51. Northeast wind 7 to 9 mph, with gusts as high as 18 mph.

Saturday

Partly sunny, with a high near 80.

Saturday Night

A chance of showers and thunderstorms before midnight, then a slight chance of showers. Mostly cloudy, with a low around 50.