Hourly Weather Forecast - Altadena, CA

12 AM
59°F
100%
4mph
SE
Rain
Humidity
77%
Feels like
59°F
Dew Point
52°F
1 AM
60°F
90%
4mph
SE
Rain
Humidity
74%
Feels like
60°F
Dew Point
51°F
2 AM
60°F
80%
4mph
SE
80% Chance of Rain
Humidity
72%
Feels like
60°F
Dew Point
51°F
3 AM
60°F
70%
3mph
ESE
70% Chance of Rain
Humidity
70%
Feels like
60°F
Dew Point
50°F
4 AM
59°F
70%
3mph
ESE
70% Chance of Rain
Humidity
71%
Feels like
59°F
Dew Point
49°F
5 AM
59°F
70%
3mph
ESE
70% Chance of Rain
Humidity
71%
Feels like
59°F
Dew Point
50°F
6 AM
59°F
70%
3mph
ESE
70% Chance of Rain
Humidity
73%
Feels like
59°F
Dew Point
50°F
6:56 AM
7 AM
60°F
70%
3mph
ESE
70% Chance of Rain
Humidity
71%
Feels like
60°F
Dew Point
51°F
8 AM
61°F
70%
3mph
ESE
70% Chance of Rain
Humidity
70%
Feels like
61°F
Dew Point
51°F
9 AM
60°F
70%
4mph
SE
70% Chance of Rain
Humidity
73%
Feels like
60°F
Dew Point
51°F
10 AM
58°F
70%
4mph
SE
70% Chance of Rain
Humidity
77%
Feels like
58°F
Dew Point
51°F
11 AM
58°F
70%
4mph
SSE
70% Chance of Rain
Humidity
77%
Feels like
58°F
Dew Point
51°F
12 PM
58°F
70%
3mph
SSE
70% Chance of Rain
Humidity
77%
Feels like
58°F
Dew Point
51°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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