Hourly Weather Forecast - Big Arm, MT

4:45 PM
5 PM
52°F
70%
10mph
S
70% Chance Rain Showers
Humidity
62%
Feels like
52°F
Dew Point
39°F
6 PM
51°F
70%
11mph
SSW
70% Chance Rain Showers
Humidity
63%
Feels like
51°F
Dew Point
39°F
7 PM
51°F
10%
13mph
SSW
Partly Cloudy
Humidity
62%
Feels like
51°F
Dew Point
39°F
8 PM
52°F
10%
15mph
SSW
Partly Cloudy
Humidity
61%
Feels like
52°F
Dew Point
39°F
9 PM
53°F
30%
16mph
SSW
30% Chance Rain Showers
Humidity
59%
Feels like
53°F
Dew Point
39°F
10 PM
53°F
10%
17mph
SW
Partly Cloudy
Humidity
57%
Feels like
53°F
Dew Point
39°F
11 PM
53°F
10%
18mph
SW
Partly Cloudy
Humidity
56%
Feels like
53°F
Dew Point
38°F

Rainfall Totals Through Wednesday A.M.

Heavy Rain Returns to Deluge Pacific Northwest

Another atmospheric river will hit the Pacific Northwest with heavy rain and high winds.

Monday's Weather Outlook

Today's Weather Outlook

How to Measure Snow via NWS

How To Measure Snow

Weekly Drought Map for December 11, 2025

Hit-or-Miss Precipitation Leads to Mixed Drought Results

A person standing in a snowy forest with their back to the camera. They are bundled up in a white hat and a brown jacket. (Image by StockSnap from Pixabay)

Common Cold Weather Illnesses

A strong cold-air-damming event from March 20, 2018.

Cold Air Damming - Cause And Effects

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