Hourly Weather Forecast - Port Costa, CA

7 PM
48°F
0%
3mph
SSE
Partly Cloudy
Humidity
98%
Feels like
48°F
Dew Point
48°F
8 PM
49°F
0%
4mph
SSE
Mostly Cloudy
Humidity
98%
Feels like
48°F
Dew Point
48°F
9 PM
49°F
10%
4mph
S
Foggy
Humidity
100%
Feels like
48°F
Dew Point
49°F
10 PM
50°F
10%
5mph
SSW
Foggy
Humidity
100%
Feels like
50°F
Dew Point
50°F
11 PM
51°F
10%
6mph
SSW
Foggy
Humidity
100%
Feels like
51°F
Dew Point
51°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.

Wednesday's Weather Outlook

Wednesday'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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