Hourly Weather Forecast - Port Costa, CA

10 AM
42°F
0%
6mph
ENE
Mostly Cloudy
Humidity
91%
Feels like
37°F
Dew Point
39°F
11 AM
46°F
0%
6mph
E
Mostly Cloudy
Humidity
81%
Feels like
42°F
Dew Point
40°F
12 PM
51°F
0%
5mph
E
Partly Cloudy
Humidity
68%
Feels like
51°F
Dew Point
41°F
1 PM
55°F
0%
4mph
E
Partly Cloudy
Humidity
59%
Feels like
55°F
Dew Point
41°F
2 PM
52°F
0%
4mph
E
Mostly Cloudy
Humidity
67%
Feels like
52°F
Dew Point
42°F
3 PM
51°F
0%
4mph
E
Partly Cloudy
Humidity
72%
Feels like
51°F
Dew Point
42°F
4 PM
48°F
0%
4mph
E
Partly Cloudy
Humidity
78%
Feels like
47°F
Dew Point
42°F
4:50 PM
5 PM
47°F
0%
3mph
ESE
Partly Cloudy
Humidity
81%
Feels like
46°F
Dew Point
41°F
6 PM
45°F
0%
3mph
SE
Partly Cloudy
Humidity
85%
Feels like
45°F
Dew Point
41°F
7 PM
45°F
0%
2mph
SSE
Partly Cloudy
Humidity
83%
Feels like
45°F
Dew Point
40°F
8 PM
44°F
0%
2mph
S
Partly Cloudy
Humidity
83%
Feels like
44°F
Dew Point
40°F
9 PM
44°F
0%
2mph
SW
Partly Cloudy
Humidity
82%
Feels like
44°F
Dew Point
39°F
10 PM
45°F
0%
2mph
SW
Partly Cloudy
Humidity
80%
Feels like
45°F
Dew Point
39°F
11 PM
44°F
0%
2mph
SW
Partly Cloudy
Humidity
83%
Feels like
44°F
Dew Point
39°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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