Hourly Weather Forecast - Port Costa, CA

8 PM
53°F
0%
5mph
WSW
Partly Cloudy
Humidity
92%
Feels like
53°F
Dew Point
51°F
9 PM
52°F
0%
5mph
WSW
Partly Cloudy
Humidity
91%
Feels like
52°F
Dew Point
49°F
10 PM
51°F
0%
4mph
WSW
Partly Cloudy
Humidity
84%
Feels like
51°F
Dew Point
47°F
11 PM
51°F
0%
4mph
WSW
Partly Cloudy
Humidity
84%
Feels like
51°F
Dew Point
46°F

Rainfall and Snowfall Totals Through Thursday

Flooding Rain, Heavy Snow and Winds Slam Northwest, North-Central U.S.

The atmospheric river this week will keep buffeting the Pacific Northwest with heavy rain, snow, and high winds.

Thursday's Weather Outlook

Thursday'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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