Hourly Weather Forecast - Saint Helena, CA

12 AM
48°F
90%
8mph
SSE
Light Rain
Humidity
99%
Feels like
44°F
Dew Point
47°F
1 AM
48°F
90%
8mph
SSE
Light Rain
Humidity
98%
Feels like
45°F
Dew Point
48°F
2 AM
48°F
90%
9mph
SSE
Rain
Humidity
97%
Feels like
45°F
Dew Point
48°F
3 AM
49°F
90%
9mph
SSE
Rain
Humidity
96%
Feels like
45°F
Dew Point
47°F
4 AM
48°F
90%
9mph
S
Rain
Humidity
95%
Feels like
44°F
Dew Point
47°F
5 AM
48°F
90%
9mph
S
Rain
Humidity
95%
Feels like
44°F
Dew Point
47°F
6 AM
48°F
90%
9mph
S
Rain
Humidity
95%
Feels like
44°F
Dew Point
47°F
7 AM
47°F
90%
8mph
S
Rain
Humidity
96%
Feels like
44°F
Dew Point
46°F
7:25 AM
8 AM
47°F
90%
9mph
S
Rain
Humidity
96%
Feels like
43°F
Dew Point
46°F
9 AM
47°F
90%
9mph
S
Light Rain
Humidity
98%
Feels like
43°F
Dew Point
47°F
10 AM
46°F
90%
9mph
S
Rain
Humidity
100%
Feels like
42°F
Dew Point
46°F
11 AM
46°F
90%
9mph
S
Rain
Humidity
100%
Feels like
42°F
Dew Point
46°F
12 PM
46°F
90%
8mph
SSW
Rain
Humidity
100%
Feels like
41°F
Dew Point
46°F
1 PM
46°F
90%
8mph
SSW
Rain
Humidity
100%
Feels like
42°F
Dew Point
46°F
2 PM
46°F
90%
8mph
SSW
Rain
Humidity
100%
Feels like
42°F
Dew Point
46°F
3 PM
46°F
90%
7mph
S
Rain
Humidity
100%
Feels like
42°F
Dew Point
46°F
4 PM
42°F
80%
7mph
S
80% Chance of Rain
Humidity
100%
Feels like
38°F
Dew Point
42°F
4:54 PM
5 PM
42°F
80%
7mph
S
80% Chance of Rain
Humidity
100%
Feels like
37°F
Dew Point
42°F
6 PM
42°F
80%
6mph
S
80% Chance of Rain
Humidity
100%
Feels like
39°F
Dew Point
42°F
7 PM
43°F
80%
6mph
S
80% Chance of Rain
Humidity
100%
Feels like
40°F
Dew Point
43°F
8 PM
44°F
80%
5mph
S
80% Chance of Rain
Humidity
100%
Feels like
41°F
Dew Point
44°F
9 PM
45°F
80%
5mph
S
80% Chance of Rain
Humidity
100%
Feels like
42°F
Dew Point
45°F
10 PM
45°F
80%
5mph
S
80% Chance of Rain
Humidity
100%
Feels like
43°F
Dew Point
45°F
11 PM
46°F
80%
5mph
S
80% Chance of Rain
Humidity
99%
Feels like
43°F
Dew Point
45°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

White Christmas? What Are The Odds

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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