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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.

45°F

7°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

21 Miles S Lloyd MT

Today
High: 60 °F
Showers
Likely
Tonight
Low: 44 °F
Slight Chance
Showers then
Mostly Clear
Tuesday
High: 66 °F
Sunny
Tuesday Night
Low: 48 °F
Partly Cloudy
Wednesday
High: 71 °F
Mostly Sunny
Wednesday Night
Low: 50 °F
Partly Cloudy
Thursday
High: 75 °F
Partly Sunny
then Chance
Showers
Thursday Night
Low: 54 °F
Slight Chance
T-storms then
Mostly Cloudy
Friday
High: 79 °F
Partly Sunny
then Chance
Showers

Detailed Forecast

Today

Showers likely, with thunderstorms also possible after noon. Mostly cloudy, with a high near 60. West northwest wind 5 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.

Tonight

A 20 percent chance of showers before 9pm. Mostly clear, with a low around 44. West northwest wind 8 to 13 mph, with gusts as high as 21 mph.

Tuesday

Sunny, with a high near 66. West northwest wind 8 to 11 mph, with gusts as high as 20 mph.

Tuesday Night

Partly cloudy, with a low around 48. North northwest wind 5 to 9 mph becoming light and variable after midnight.

Wednesday

Mostly sunny, with a high near 71. East southeast wind 3 to 6 mph.

Wednesday Night

Partly cloudy, with a low around 50. East wind 7 to 9 mph, with gusts as high as 18 mph.

Thursday

A 30 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 75. Southeast wind 7 to 14 mph, with gusts as high as 24 mph.

Thursday Night

A slight chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 54. East southeast wind 6 to 11 mph, with gusts as high as 22 mph.

Friday

A chance of showers and thunderstorms after noon. Partly sunny, with a high near 79.

Friday Night

Showers and possibly a thunderstorm before midnight, then a chance of showers and thunderstorms after midnight. Mostly cloudy, with a low around 54.

Saturday

A chance of showers and thunderstorms. Partly sunny, with a high near 69.

Saturday Night

A chance of showers and thunderstorms. Mostly cloudy, with a low around 49.

Sunday

Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 61. Breezy.