Hourly Weather Forecast - Mammoth, MT

12 AM
28°F
40%
19mph
WSW
40% Chance of Snow
Humidity
68%
Feels like
14°F
Dew Point
18°F
1 AM
28°F
40%
19mph
WSW
40% Chance of Flurries
Humidity
67%
Feels like
14°F
Dew Point
18°F
2 AM
27°F
30%
19mph
WSW
30% Chance Snow Showers
Humidity
67%
Feels like
14°F
Dew Point
18°F
3 AM
27°F
30%
19mph
WSW
30% Chance Snow Showers
Humidity
67%
Feels like
14°F
Dew Point
17°F
4 AM
26°F
20%
18mph
WSW
Mostly Cloudy
Humidity
67%
Feels like
13°F
Dew Point
17°F
5 AM
26°F
20%
18mph
WSW
Mostly Cloudy
Humidity
67%
Feels like
13°F
Dew Point
16°F
6 AM
25°F
20%
17mph
WSW
Mostly Cloudy
Humidity
67%
Feels like
12°F
Dew Point
16°F
7 AM
25°F
20%
16mph
WSW
Mostly Cloudy
Humidity
66%
Feels like
12°F
Dew Point
15°F
8 AM
25°F
20%
15mph
WSW
Partly Cloudy
Humidity
65%
Feels like
12°F
Dew Point
15°F
8:05 AM
9 AM
25°F
10%
15mph
WSW
Mostly Cloudy
Humidity
64%
Feels like
13°F
Dew Point
15°F
10 AM
26°F
10%
14mph
WSW
Mostly Cloudy
Humidity
62%
Feels like
14°F
Dew Point
15°F
11 AM
27°F
10%
14mph
WSW
Mostly Cloudy
Humidity
61%
Feels like
15°F
Dew Point
15°F
12 PM
27°F
10%
14mph
WSW
Mostly Cloudy
Humidity
59%
Feels like
16°F
Dew Point
15°F
1 PM
28°F
10%
15mph
WSW
Partly Cloudy
Humidity
58%
Feels like
16°F
Dew Point
15°F
2 PM
28°F
10%
16mph
WSW
Partly Cloudy
Humidity
57%
Feels like
16°F
Dew Point
15°F
3 PM
26°F
10%
16mph
WSW
Partly Cloudy
Humidity
58%
Feels like
14°F
Dew Point
14°F
4 PM
25°F
10%
15mph
WSW
Partly Cloudy
Humidity
60%
Feels like
12°F
Dew Point
13°F
4:46 PM
5 PM
23°F
10%
15mph
WSW
Partly Cloudy
Humidity
62%
Feels like
11°F
Dew Point
12°F
6 PM
23°F
10%
15mph
WSW
Partly Cloudy
Humidity
61%
Feels like
9°F
Dew Point
11°F
7 PM
22°F
10%
16mph
SW
Partly Cloudy
Humidity
60%
Feels like
9°F
Dew Point
11°F
8 PM
22°F
10%
17mph
SW
Partly Cloudy
Humidity
59%
Feels like
8°F
Dew Point
10°F
9 PM
22°F
10%
17mph
SW
Partly Cloudy
Humidity
58%
Feels like
8°F
Dew Point
9°F
10 PM
21°F
10%
17mph
SW
Partly Cloudy
Humidity
57%
Feels like
7°F
Dew Point
8°F
11 PM
21°F
10%
16mph
SW
Partly Cloudy
Humidity
56%
Feels like
7°F
Dew Point
8°F

Rainfall and Snowfall Totals Through Wednesday

Heavy Rain, Snow, and Winds Wallop Northwest

The atmospheric river this week continues to hit the Pacific Northwest with heavy rain, snow, and high winds.

Tuesday'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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