Cold Front to Bring Cooling and Heavy Rain in the East; Building Heat and Monsoon in the West

A slow moving cold front will bring temperatures back to near normal early this week in the East. Strong to severe storms ahead of the front may produce damaging winds and heavy rain that could cause flash flooding. Strengthening high pressure in the West will produce surging monsoon moisture with potential for flash flooding. Heat may become excessive in the Desert Southwest this week. Read More >

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Current conditions at

USCRN SITE NEAR ST. MARY 1SSW (MRYM8)

Lat: 48.74111°NLon: 113.43306°WElev: 4575ft.

76°F

24°C

Humidity	31%
Wind Speed	NA
Barometer	NA
Dewpoint	43°F (6°C)
Visibility	NA
Heat Index	77°F (25°C)
Last update	22 Jul 6:10 pm MDT

More Information:

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

Extended Forecast for

St Mary MT

Tonight

Slight Chance
T-storms then
Slight Chance
Showers
Low: 54 °F
Tuesday

Sunny then
Chance
Showers
High: 86 °F
Tuesday
Night

Chance
T-storms then
Slight Chance
T-storms
Low: 55 °F
Wednesday

Mostly Sunny
then Sunny
and Breezy
High: 69 °F
Wednesday
Night

Clear
Low: 47 °F
Thursday

Sunny
High: 73 °F
Thursday
Night

Clear
Low: 46 °F
Friday

Sunny
High: 78 °F
Friday
Night

Mostly Clear
Low: 50 °F

Detailed Forecast

Tonight

A slight chance of showers and thunderstorms before 3am, then a slight chance of showers between 3am and 4am. Partly cloudy, with a low around 54. Calm wind becoming south around 6 mph in the evening. Chance of precipitation is 20%.

Tuesday

A 30 percent chance of showers and thunderstorms, mainly between 1pm and 2pm. Sunny, with a high near 86. Calm wind becoming southwest around 6 mph in the afternoon.

Tuesday Night

A chance of showers and thunderstorms before 3am, then a slight chance of showers. Mostly cloudy, with a low around 55. Southwest wind around 6 mph. Chance of precipitation is 50%.

Wednesday

Sunny, with a high near 69. Breezy, with a southwest wind 8 to 13 mph increasing to 17 to 22 mph in the afternoon. Winds could gust as high as 48 mph.

Wednesday Night

Clear, with a low around 47. West southwest wind 15 to 20 mph decreasing to 9 to 14 mph after midnight. Winds could gust as high as 39 mph.

Thursday

Sunny, with a high near 73.

Thursday Night

Clear, with a low around 46.

Friday

Sunny, with a high near 78.

Friday Night

Mostly clear, with a low around 50.

Saturday

Sunny, with a high near 76.