Hourly Weather Forecast - Port Costa, CA

12 AM
51°F
60%
15mph
S
60% Chance Rain Showers
Humidity
87%
Feels like
51°F
Dew Point
47°F
1 AM
50°F
60%
15mph
SSW
60% Chance Rain Showers
Humidity
88%
Feels like
50°F
Dew Point
46°F
2 AM
50°F
60%
15mph
SSW
60% Chance Rain Showers
Humidity
87%
Feels like
44°F
Dew Point
46°F
3 AM
50°F
60%
14mph
SW
60% Chance Rain Showers
Humidity
86%
Feels like
50°F
Dew Point
46°F
4 AM
50°F
60%
12mph
SW
60% Chance Rain Showers
Humidity
87%
Feels like
45°F
Dew Point
46°F
5 AM
49°F
60%
11mph
SSW
60% Chance Rain Showers
Humidity
88%
Feels like
45°F
Dew Point
46°F
6 AM
49°F
60%
9mph
S
60% Chance Rain Showers
Humidity
91%
Feels like
45°F
Dew Point
46°F
7 AM
49°F
60%
9mph
S
60% Chance Rain Showers
Humidity
93%
Feels like
45°F
Dew Point
47°F
7:22 AM
8 AM
49°F
60%
9mph
SSE
60% Chance Rain Showers
Humidity
94%
Feels like
46°F
Dew Point
48°F
9 AM
50°F
70%
8mph
SSE
70% Chance Rain Showers
Humidity
94%
Feels like
50°F
Dew Point
48°F
10 AM
50°F
70%
9mph
SE
70% Chance of Light Rain
Humidity
96%
Feels like
50°F
Dew Point
49°F
11 AM
50°F
70%
9mph
SE
70% Chance of Light Rain
Humidity
98%
Feels like
50°F
Dew Point
49°F
12 PM
50°F
70%
9mph
SE
70% Chance of Light Rain
Humidity
99%
Feels like
46°F
Dew Point
49°F
1 PM
49°F
60%
10mph
SE
60% Chance of Light Rain
Humidity
100%
Feels like
45°F
Dew Point
49°F
2 PM
49°F
60%
10mph
SE
60% Chance of Light Rain
Humidity
100%
Feels like
45°F
Dew Point
49°F
3 PM
48°F
50%
9mph
SE
50% Chance of Light Rain
Humidity
100%
Feels like
44°F
Dew Point
48°F
4 PM
46°F
40%
9mph
SE
40% Chance of Light Rain
Humidity
100%
Feels like
42°F
Dew Point
46°F
4:54 PM
5 PM
45°F
40%
10mph
SE
40% Chance of Rain
Humidity
100%
Feels like
40°F
Dew Point
45°F
6 PM
46°F
30%
11mph
SE
30% Chance of Rain
Humidity
100%
Feels like
40°F
Dew Point
46°F
7 PM
46°F
40%
11mph
SE
40% Chance of Rain
Humidity
100%
Feels like
41°F
Dew Point
46°F
8 PM
47°F
60%
12mph
SE
60% Chance of Rain
Humidity
97%
Feels like
42°F
Dew Point
46°F
9 PM
48°F
70%
13mph
SE
70% Chance of Rain
Humidity
94%
Feels like
43°F
Dew Point
46°F
10 PM
49°F
60%
13mph
SSE
60% Chance of Rain
Humidity
91%
Feels like
43°F
Dew Point
46°F
11 PM
49°F
50%
14mph
SSE
50% Chance of Light Rain
Humidity
88%
Feels like
44°F
Dew Point
46°F

Rain And Snow Totals Through Monday

Atmospheric River Takes Aim For Northern California

The plume of abundant moisture impacting the Northwest the last several days will focus more on Northern California later today into Monday bringing heavy rainfall and mountain snow.

NOAA, NCDC

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Weekend Weather Outlook

Weekend Weather Outlook

Cold weather

During Extreme Cold: Watch for Frostbite!

Flu Update Valid For Week Ending December 13, 2025

Weekly Flu Update: Flu Spreading Hard Across U.S.

Watch vs. Warning

Flash Flood Watch and Warning Defined

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