New York, NY 83° Los Angeles, CA 68° 🌤️ Chicago, IL 🌤️ Houston, TX 🌤️ Miami, FL 🌤️ Phoenix, AZ 🌤️ Seattle, WA 🌤️ Denver, CO Toronto, ON 68° Vancouver, BC 64°
WeatherLive › California › Altadena

Altadena, CA Weather (91003)

ZIP codes: 91003 · 91001 · 91104
Today Hourly 10-Day Weekend Monthly Radar Air Quality Climate
Current WeatherAltadena · 9:30 AM PDT
86° | 59°
68°F
Feels like 69°
Sunny
WindSW 5 mph · Gusts 6 mph
Precip5% · –
Humidity79% · Dew point 62°
UV index10 Very high
Air Quality57 Moderate
Pressure30.06 inHg
Visibility6 mi
Sunrise / Sunset6:13 AM · 7:40 PM · 13h 27m

Weather map — Altadena

Full radar →
Now
68°
10%
5 mph
10:00
73°
6%
6 mph
11:00
81°
1%
7 mph
12:00
83°
1%
7 mph
13:00
85°
1%
9 mph
14:00
86°
1%
9 mph
15:00
85°
1%
9 mph
16:00
85°
1%
9 mph
17:00
83°
1%
8 mph
18:00
81°
1%
7 mph
19:00
78°
1%
6 mph
20:00
70°
2%
3 mph
21:00
68°
2%
3 mph
22:00
66°
3%
2 mph
23:00
65°
3%
1 mph
00:00
65°
3%
0 mph
01:00
65°
2%
1 mph
02:00
65°
2%
0 mph
03:00
64°
2%
2 mph
04:00
64°
3%
2 mph
05:00
64°
3%
1 mph
06:00
63°
3%
1 mph
07:00
67°
2%
2 mph
08:00
76°
1%
2 mph

Today · Sat 8/15

High 86°
5% / –

Sunny. Winds SW at 9 mph.

Tonight · Sat 8/15

Low 63°
2% / –

Sunny. Winds SE at 3 mph.

Tomorrow · Sun 8/16

88° | 63°
1% / –

Sunny. Winds SW at 9 mph.

7-day trend

Altadena · temperature + precipitation

10-day forecast

Updated 9:30 AM

Details & indices

Wind
5 mph SW
Gusts 6 mph
Humidity
79%
Dew point 62°
Pressure
30.06 inHg
Rising
UV index
10 — Very high
High today
Air Quality
Moderate
AQI 57 · 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
None

Sun & moon

Sunrise6:13 AM
Sunset7:40 PM
Length of day13h 27m
Moonrise9:24 AM
Moonset9:20 PM
Moon phase🌒 Waxing Crescent · 11%
Next full moonAug 27 Sturgeon Moon
Latitude34.1897°N
Longitude-118.1312°E

Water temps nearby

View all →
Santa Monica Beach (24 mi)73°
Venice Beach (24 mi)73°
Huntington Beach (38 mi)74°
Zuma Beach, Malibu (42 mi)73°
Newport Beach (42 mi)74°
Laguna Beach (49 mi)75°
🌤️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
68° 🌤️
San Diego
—
— 🌤️
San Jose
—
— 🌤️
San Francisco
—
— 🌤️
Fresno
—
— 🌤️
Sacramento
—
—
Data sources · Saturday, August 15
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: 9:30 AM
Weather in Altadena
Altadena's outlook: warmest day near 97° (Sunday), coldest night about 59° (Saturday). 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 2° 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: 9:30 AM