Hourly Weather Forecast - Mammoth, MT

12 AM
23°F
10%
16mph
SW
Partly Cloudy
Humidity
56%
Feels like
10°F
Dew Point
10°F
1 AM
23°F
10%
15mph
SW
Partly Cloudy
Humidity
56%
Feels like
10°F
Dew Point
10°F
2 AM
23°F
10%
15mph
SW
Partly Cloudy
Humidity
57%
Feels like
10°F
Dew Point
10°F
3 AM
22°F
10%
15mph
SW
Partly Cloudy
Humidity
57%
Feels like
9°F
Dew Point
10°F
4 AM
22°F
10%
14mph
SW
Mostly Clear
Humidity
57%
Feels like
9°F
Dew Point
10°F
5 AM
22°F
10%
14mph
SW
Mostly Clear
Humidity
57%
Feels like
10°F
Dew Point
10°F
6 AM
22°F
10%
13mph
SW
Mostly Clear
Humidity
58%
Feels like
10°F
Dew Point
10°F
7 AM
22°F
10%
12mph
SW
Clear
Humidity
59%
Feels like
10°F
Dew Point
10°F
8 AM
22°F
10%
11mph
SW
Clear
Humidity
59%
Feels like
11°F
Dew Point
10°F
8:05 AM
9 AM
23°F
10%
11mph
SW
Sunny
Humidity
58%
Feels like
12°F
Dew Point
10°F
10 AM
25°F
10%
10mph
SW
Sunny
Humidity
55%
Feels like
15°F
Dew Point
11°F
11 AM
26°F
10%
10mph
SW
Sunny
Humidity
53%
Feels like
16°F
Dew Point
11°F
12 PM
27°F
20%
11mph
SW
Sunny
Humidity
51%
Feels like
18°F
Dew Point
12°F
1 PM
28°F
20%
11mph
SW
Sunny
Humidity
50%
Feels like
18°F
Dew Point
12°F
2 PM
28°F
20%
11mph
SW
Sunny
Humidity
51%
Feels like
19°F
Dew Point
12°F
3 PM
28°F
10%
11mph
SW
Sunny
Humidity
53%
Feels like
18°F
Dew Point
13°F
4 PM
27°F
10%
10mph
SW
Sunny
Humidity
56%
Feels like
17°F
Dew Point
13°F
4:46 PM
5 PM
26°F
30%
9mph
SW
30% Chance Snow Showers
Humidity
59%
Feels like
16°F
Dew Point
13°F
6 PM
25°F
40%
10mph
SW
40% Chance Snow Showers
Humidity
61%
Feels like
15°F
Dew Point
13°F
7 PM
25°F
50%
11mph
SW
50% Chance Snow Showers
Humidity
62%
Feels like
14°F
Dew Point
14°F
8 PM
25°F
60%
12mph
SW
60% Chance of Snow
Humidity
63%
Feels like
14°F
Dew Point
14°F
9 PM
25°F
50%
13mph
SW
50% Chance of Snow
Humidity
64%
Feels like
14°F
Dew Point
15°F
10 PM
26°F
50%
13mph
SW
50% Chance of Snow
Humidity
64%
Feels like
15°F
Dew Point
16°F
11 PM
26°F
50%
13mph
SW
50% Chance of Snow
Humidity
65%
Feels like
15°F
Dew Point
16°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

loading ad...

Today's National Outlook

Hurricane Tracker

Allergy Forecast

Snow & Ski Forecast

Traffic Cameras

Weather Cameras

Traffic Cameras

Weather Cameras

Outdoor Sports Guide