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WeatherLive › California › Altadena

Altadena, CA Weather (91003)

ZIP codes: 91003 · 91001 · 91104
Today Hourly 10-Day Weekend Monthly Radar Air Quality Climate
Current WeatherAltadena · 1:55 PM PDT
41° | 22°
40°C
Feels like 39°
Sunny
WindSW 8 mph · Gusts 17 mph
Precip1% · –
Humidity21% · Dew point 14°
UV index10 Very high
Air Quality99 Moderate
Pressure29.94 inHg
Visibility6 mi
Sunrise / Sunset6:20 AM · 7:29 PM · 13h 9m

Weather map — Altadena

Full radar →
Now
40°
1%
8 mph
14:00
41°
0%
8 mph
15:00
40°
0%
8 mph
16:00
39°
0%
8 mph
17:00
36°
0%
7 mph
18:00
32°
1%
6 mph
19:00
28°
1%
4 mph
20:00
26°
2%
2 mph
21:00
25°
1%
2 mph
22:00
28°
1%
2 mph
23:00
27°
4%
2 mph
00:00
27°
4%
2 mph
01:00
27°
3%
1 mph
02:00
27°
4%
2 mph
03:00
27°
5%
3 mph
04:00
29°
1%
4 mph
05:00
29°
1%
4 mph
06:00
29°
1%
4 mph
07:00
30°
1%
4 mph
08:00
29°
1%
1 mph
09:00
31°
1%
4 mph
10:00
33°
1%
6 mph
11:00
34°
1%
6 mph
12:00
35°
1%
7 mph

Today · Mon 8/24

High 41°
1% / –

Sunny. Winds SW at 8 mph.

Tonight · Mon 8/24

Low 25°
1% / –

Sunny. Winds SE at 2 mph.

Tomorrow · Tue 8/25

37° | 27°
1% / –

Sunny. Winds SW at 8 mph.

7-day trend

Altadena · temperature + precipitation

10-day forecast

Updated 1:55 PM

Details & indices

Wind
8 mph SW
Gusts 17 mph
Humidity
21%
Dew point 14°
Pressure
29.94 inHg
Rising
UV index
10 — Very high
High today
Air Quality
Moderate
AQI 99 · US EPA
Allergy
Very high
Mugwort
Visibility
6 mi
Clear view
Allergy — Altadena

🌿 Conditions right now

View all →
Birch
None
Grass
Moderate
Oak
None
Alder
None
Hazel
None
Mugwort
High
Ragweed
Moderate

Sun & moon

Sunrise6:20 AM
Sunset7:29 PM
Length of day13h 9m
Moonrise5:43 PM
Moonset2:46 AM
Moon phase🌔 Waxing Gibbous · 90%
Next full moonAug 27 Sturgeon Moon
Latitude34.1897°N
Longitude-118.1312°E

Water temps nearby

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Santa Monica Beach (24 mi)73°
Venice Beach (24 mi)73°
Huntington Beach (38 mi)73°
Zuma Beach, Malibu (42 mi)73°
Newport Beach (42 mi)73°
Laguna Beach (49 mi)74°
🌤️No rain expected in the next 90 minutes
Now+30+60+90 min
Minute-by-minute precip · HRRR nowcast

Daily planner

computed from today's forecast
Laundry day
Great
Line-drying weather
Grilling
Great
Fire up the grill
Running
Fair
Lace up outside
Patio
Great
Dinner outdoors
Nearby places in {{REGION}}
Los Angeles
Sunny
38°
San Diego
Mostly cloudy
25°
San Jose
Sunny
29°
San Francisco
Mostly cloudy
17°
Fresno
Mostly cloudy
36°
Sacramento
Partly cloudy
30°
Data sources · Monday, August 24
Where the Altadena forecast comes from
This page blends NOAA/NWS model guidance with global ensembles for the 10-day outlook, air quality and alerts. Data refreshes every hour, current conditions every 15 minutes. Coordinates: 34.1897°N, -118.1312°.
NBM + global weather models
Updated: 1:55 PM
Weather in Altadena
Altadena's outlook: warmest day near 41° (Monday), coldest night about 19° (Wednesday). Rain totals look negligible: a dry run of days ahead. The NWS alert board for this area is currently clear. Right now Altadena is running about 84° warmer than Oceanside. Longer view: Mediterranean pattern — nearly all rain lands November through March.
Altadena, CA · Elev 1,358 ft · 34.19°N, 118.13°W · California · Forecast computed for these exact coordinates
Powered by NWS/NOAA guidance, multi-model forecasts and official environmental feeds · NOAA/NWS · EPA AirNow · MET Norway · global models
Updated: 1:55 PM