Hourly Weather Forecast - Port Costa, CA

6 PM
43°F
0%
3mph
E
Partly Cloudy
Humidity
89%
Feels like
42°F
Dew Point
40°F
7 PM
43°F
0%
3mph
ESE
Partly Cloudy
Humidity
88%
Feels like
43°F
Dew Point
39°F
8 PM
42°F
0%
2mph
SE
Partly Cloudy
Humidity
91%
Feels like
42°F
Dew Point
39°F
9 PM
42°F
0%
2mph
S
Mostly Clear
Humidity
89%
Feels like
42°F
Dew Point
39°F
10 PM
43°F
0%
2mph
SSW
Partly Cloudy
Humidity
85%
Feels like
43°F
Dew Point
38°F
11 PM
42°F
0%
3mph
SSW
Mostly Cloudy
Humidity
88%
Feels like
42°F
Dew Point
38°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

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