Hourly Weather Forecast - Port Costa, CA

12 AM
54°F
70%
12mph
SSW
70% Chance of Light Rain
Humidity
97%
Feels like
54°F
Dew Point
53°F
1 AM
54°F
70%
12mph
SSW
70% Chance of Light Rain
Humidity
97%
Feels like
54°F
Dew Point
53°F
2 AM
54°F
80%
11mph
SSW
80% Chance of Light Rain
Humidity
98%
Feels like
54°F
Dew Point
53°F
3 AM
54°F
80%
11mph
SSW
80% Chance of Light Rain
Humidity
98%
Feels like
54°F
Dew Point
53°F
4 AM
53°F
70%
11mph
SSW
70% Chance of Light Rain
Humidity
98%
Feels like
53°F
Dew Point
53°F
5 AM
53°F
70%
11mph
SSW
70% Chance of Light Rain
Humidity
100%
Feels like
53°F
Dew Point
53°F
6 AM
53°F
60%
11mph
SSW
60% Chance of Light Rain
Humidity
99%
Feels like
53°F
Dew Point
53°F
7 AM
53°F
60%
11mph
SSW
60% Chance of Light Rain
Humidity
99%
Feels like
53°F
Dew Point
53°F
7:21 AM
8 AM
54°F
70%
11mph
S
70% Chance of Light Rain
Humidity
99%
Feels like
54°F
Dew Point
54°F
9 AM
54°F
70%
10mph
SSW
70% Chance of Light Rain
Humidity
100%
Feels like
54°F
Dew Point
54°F
10 AM
54°F
60%
9mph
SSW
60% Chance of Light Rain
Humidity
100%
Feels like
54°F
Dew Point
54°F
11 AM
54°F
50%
9mph
SSW
50% Chance of Light Rain
Humidity
100%
Feels like
54°F
Dew Point
54°F
12 PM
54°F
50%
9mph
SSW
50% Chance of Light Rain
Humidity
100%
Feels like
54°F
Dew Point
54°F
1 PM
55°F
50%
8mph
SSW
50% Chance of Light Rain
Humidity
100%
Feels like
55°F
Dew Point
55°F
2 PM
54°F
50%
8mph
SSW
50% Chance of Light Rain
Humidity
100%
Feels like
54°F
Dew Point
54°F
3 PM
53°F
50%
7mph
SSW
50% Chance of Light Rain
Humidity
100%
Feels like
53°F
Dew Point
53°F
4 PM
51°F
40%
7mph
SSW
40% Chance of Light Rain
Humidity
100%
Feels like
51°F
Dew Point
51°F
4:53 PM
5 PM
50°F
30%
7mph
SSW
30% Chance of Light Rain
Humidity
100%
Feels like
50°F
Dew Point
50°F
6 PM
50°F
30%
7mph
SSW
30% Chance of Light Rain
Humidity
100%
Feels like
47°F
Dew Point
50°F
7 PM
50°F
30%
7mph
S
30% Chance of Light Rain
Humidity
100%
Feels like
47°F
Dew Point
50°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

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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