Hourly Weather Forecast - Mammoth, MT

12 AM
20°F
30%
13mph
WSW
30% Chance Snow Showers
Humidity
57%
Feels like
7°F
Dew Point
7°F
1 AM
20°F
30%
14mph
WSW
30% Chance Snow Showers
Humidity
56%
Feels like
7°F
Dew Point
7°F
2 AM
20°F
20%
14mph
WSW
Mostly Cloudy
Humidity
56%
Feels like
6°F
Dew Point
7°F
3 AM
19°F
20%
13mph
WSW
Mostly Cloudy
Humidity
56%
Feels like
6°F
Dew Point
6°F
4 AM
18°F
10%
12mph
WSW
Partly Cloudy
Humidity
57%
Feels like
5°F
Dew Point
6°F
5 AM
18°F
10%
11mph
WSW
Partly Cloudy
Humidity
58%
Feels like
5°F
Dew Point
6°F
6 AM
17°F
10%
10mph
WSW
Partly Cloudy
Humidity
60%
Feels like
5°F
Dew Point
6°F

Rain And Snow Totals Through Monday

Atmospheric River Impacts Northern California

The plume of abundant moisture impacting the Northwest the last several days will focus more on Northern California through Monday bringing heavy rainfall and mountain snow.

NOAA, NCDC

White Christmas? What Are The Odds

Today's Weather Outlook

Today's Weather Outlook

Cold weather

During Extreme Cold: Watch for Frostbite!

Flu Update Valid For Week Ending December 13, 2025

Weekly Flu Update: Flu Spreading Hard Across U.S.

Watch vs. Warning

Flash Flood Watch and Warning Defined

loading ad...

Today's National Outlook

Hurricane Tracker

Allergy Forecast

Snow & Ski Forecast

Traffic Cameras

Weather Cameras

Traffic Cameras

Weather Cameras

Outdoor Sports Guide