Hourly Weather Forecast - Napa, CA

12 AM
47°F
70%
9mph
S
70% Chance of Light Rain
Humidity
98%
Feels like
43°F
Dew Point
46°F
1 AM
47°F
70%
9mph
SSE
70% Chance of Light Rain
Humidity
98%
Feels like
43°F
Dew Point
47°F
2 AM
47°F
70%
8mph
SSE
70% Chance of Light Rain
Humidity
98%
Feels like
43°F
Dew Point
47°F
3 AM
47°F
70%
8mph
SSE
70% Chance of Light Rain
Humidity
98%
Feels like
44°F
Dew Point
47°F
4 AM
47°F
70%
7mph
S
70% Chance of Light Rain
Humidity
98%
Feels like
44°F
Dew Point
47°F
5 AM
47°F
70%
7mph
S
70% Chance of Light Rain
Humidity
97%
Feels like
44°F
Dew Point
47°F
6 AM
47°F
70%
7mph
S
70% Chance Rain Showers
Humidity
96%
Feels like
44°F
Dew Point
46°F
7 AM
48°F
60%
7mph
S
60% Chance Rain Showers
Humidity
96%
Feels like
44°F
Dew Point
46°F
7:24 AM
8 AM
48°F
50%
8mph
S
50% Chance Rain Showers
Humidity
97%
Feels like
44°F
Dew Point
47°F
9 AM
48°F
40%
9mph
SSW
40% Chance Rain Showers
Humidity
98%
Feels like
44°F
Dew Point
47°F
10 AM
48°F
40%
9mph
SSW
40% Chance Rain Showers
Humidity
100%
Feels like
44°F
Dew Point
48°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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Sunday's Weather Outlook

Sunday's 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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