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The Regional Temperatures and Precipitation Product for the State of Montana (RTPMT) will be discontinued on May 6, 2026.

Current conditions at

FLATTOP MTN. (FTMM8)

Lat: 48.80225°NLon: 113.85713°WElev: 6300.0ft.

50°F

10°C

Humidity	33%
Wind Speed	NA NA MPH
Barometer	NA
Dewpoint	22°F (-6°C)
Visibility	NA
Last update	20 Apr 08:00 PM MDT

More Information:

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

Extended Forecast for

16 Miles W St Mary MT

Tonight
Low: 34 °F
Partly Cloudy
Tuesday
High: 54 °F
Mostly Sunny
Tuesday Night
Low: 36 °F
Mostly Cloudy
Wednesday
High: 43 °F
Chance
Rain/Snow
then
Rain/Snow
Wednesday Night
Low: 19 °F
Heavy Snow
Thursday
High: 24 °F
Snow
Thursday Night
Low: 16 °F
Chance Snow
Friday
High: 23 °F
Chance Snow
Friday Night
Low: 13 °F
Slight Chance
Snow then
Mostly Cloudy

Detailed Forecast

Tonight

Partly cloudy, with a low around 34. Southwest wind around 11 mph.

Tuesday

Mostly sunny, with a high near 54. South southwest wind 8 to 10 mph.

Tuesday Night

Mostly cloudy, with a low around 36. South wind around 9 mph becoming northwest after midnight.

Wednesday

A chance of rain and snow showers before noon, then rain, possibly mixed with snow showers between noon and 3pm, then snow showers after 3pm. Some thunder is also possible. High near 43. North wind 9 to 15 mph, with gusts as high as 21 mph. Chance of precipitation is 90%. New snow accumulation of less than one inch possible.

Wednesday Night

Snow. The snow could be heavy at times. Low around 19. North wind 16 to 18 mph, with gusts as high as 24 mph. Chance of precipitation is 90%. New snow accumulation of 4 to 8 inches possible.

Thursday

Snow. High near 24. North wind around 15 mph, with gusts as high as 22 mph. Chance of precipitation is 80%. New snow accumulation of 2 to 4 inches possible.

Thursday Night

A 50 percent chance of snow. Mostly cloudy, with a low around 16. North wind 14 to 17 mph, with gusts as high as 23 mph. New snow accumulation of around an inch possible.

Friday

A chance of snow. Mostly cloudy, with a high near 23. North wind 13 to 16 mph, with gusts as high as 22 mph.

Friday Night

A slight chance of snow before midnight. Mostly cloudy, with a low around 13.

Saturday

A slight chance of snow. Partly sunny, with a high near 26.

Saturday Night

Partly cloudy, with a low around 16.

Sunday

A slight chance of snow. Mostly sunny, with a high near 30.

Sunday Night

Mostly cloudy, with a low around 21.