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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 (ROCM8)

Lat: 48.17478°NLon: 109.64728°WElev: 4700.0ft.

56°F

13°C

Humidity	NA
Wind Speed	NA NA MPH
Barometer	NA
Dewpoint	N/A
Visibility	NA
Last update	NA

More Information:

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

Extended Forecast for

10 Miles SSE Rocky Boy MT

Tonight
Low: 46 °F
Chance
Showers then
Showers
Sunday
High: 54 °F
Showers
Sunday Night
Low: 43 °F
Rain and
Breezy
Monday
High: 53 °F
Rain
Monday Night
Low: 44 °F
Showers
Tuesday
High: 61 °F
Showers
Likely
Tuesday Night
Low: 46 °F
Slight Chance
T-storms then
Partly Cloudy
Wednesday
High: 65 °F
Partly Sunny
then Chance
T-storms
Wednesday Night
Low: 47 °F
Slight Chance
T-storms then
Partly Cloudy

Detailed Forecast

Tonight

A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 3am. Low around 46. Northwest wind 5 to 8 mph, with gusts as high as 20 mph. Chance of precipitation is 80%.

Sunday

Rain, mainly before noon, then showers and possibly a thunderstorm after noon. High near 54. West northwest wind 10 to 17 mph, with gusts as high as 34 mph. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.

Sunday Night

Rain. Low around 43. Breezy, with a west southwest wind 16 to 22 mph, with gusts as high as 38 mph. Chance of precipitation is 90%. New precipitation amounts between three quarters and one inch possible.

Monday

Rain. High near 53. West wind 14 to 16 mph, with gusts as high as 31 mph. Chance of precipitation is 90%.

Monday Night

Showers and possibly a thunderstorm before 9pm, then rain after 9pm. Low around 44. West wind 15 to 17 mph, with gusts as high as 32 mph. Chance of precipitation is 90%.

Tuesday

Showers likely, with thunderstorms also possible after noon. Mostly cloudy, with a high near 61. West wind 14 to 17 mph, with gusts as high as 30 mph. Chance of precipitation is 70%.

Tuesday Night

A 20 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 46. West wind 6 to 11 mph becoming light west southwest in the evening.

Wednesday

A chance of showers and thunderstorms after noon. Partly sunny, with a high near 65. Light west southwest wind becoming west 5 to 9 mph in the morning.

Wednesday Night

A slight chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 47.

Thursday

Mostly sunny, with a high near 70.

Thursday Night

A chance of showers and thunderstorms. Mostly cloudy, with a low around 51.

Friday

A chance of showers and thunderstorms. Partly sunny, with a high near 70.

Friday Night

A chance of showers and thunderstorms. Partly cloudy, with a low around 47.

Independence Day

A chance of showers and thunderstorms. Mostly sunny, with a high near 65.