Altadena, CA weather
Today, hourly and 7-day forecast, sunrise and sunset, and the normal climate month by month
Weather in Altadena now
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Altadena weather by the hour
Altadena weather for the next 7 days
Source: National Weather Service (NOAA) · forecast for the coordinates of Altadena.
This week in Altadena
Sunrise, sunset and moon in Altadena
What is the weather usually like in Altadena?
Köppen climate classification, calculated from the 1991–2020 normals
- Augustwarmest month · 90°F average high
- Decembercoldest month · 43°F average low
- 20.1 inprecipitation per year · 510 mm
Average high and low temperature (°F)
Average precipitation (inches)
Best time to visit Altadena: April to June and October, with mild temperatures and fewer rainy days.
Source: NOAA NCEI U.S. Climate Normals 1991–2020, station PASADENA, CA US (USC00046719), adjusted for the elevation of Altadena.
Altadena weather month by month
Sunrise and sunset in Altadena through the year
| Month | Sunrise | Sunset | Daylight |
|---|---|---|---|
| January | 6:56 AM | 5:07 PM | 10 h 10 min |
| February | 6:35 AM | 5:37 PM | 11 h 1 min |
| March | 7:01 AM | 7:01 PM | 12 h 0 min |
| April | 6:19 AM | 7:25 PM | 13 h 5 min |
| May | 5:48 AM | 7:48 PM | 13 h 59 min |
| June | 5:38 AM | 8:07 PM | 14 h 28 min |
| July | 5:50 AM | 8:06 PM | 14 h 15 min |
| August | 6:12 AM | 7:41 PM | 13 h 28 min |
| September | 6:34 AM | 7:00 PM | 12 h 25 min |
| October | 6:56 AM | 6:19 PM | 11 h 22 min |
| November | 6:24 AM | 4:49 PM | 10 h 25 min |
| December | 6:49 AM | 4:45 PM | 9 h 56 min |
Times for the 15th of each month, local time (America/Los Angeles).
What is the weather like in Altadena?
Altadena has a hot-summer mediterranean climate. The warmest month is August, with an average high of 90°F (32°C), and the coldest is December, with average lows of 43°F (6°C).
It gets about 20.1 inches (510 mm) of precipitation a year. The wettest month is February and the driest is August.
The best time to visit Altadena is April to June and October. At 1,358 ft of elevation, nights are mild most of the year. The live forecast on this page comes from the National Weather Service and the climate averages from NOAA’s 1991–2020 U.S. Climate Normals.
More about Altadena
Weather in towns near Altadena
Questions about the weather in Altadena
What is the hottest month in Altadena?
August, with an average high of 90°F (32°C).
What is the coldest month in Altadena?
December, with an average low of 43°F (6°C).
How much does it rain in Altadena?
About 20.1 inches (510 mm) a year; the wettest month is February.
Does it snow in Altadena?
Snow is very rare or not recorded at the nearest weather station.
When is the best time to visit Altadena?
April to June and October, when temperatures are most pleasant and rainy days are fewer.
What climate does Altadena have?
Hot-summer mediterranean (Köppen Csa).
What is the weather like in Altadena in November?
Highs average 73°F and lows 48°F, with about 1.1 inches of precipitation.
What time is sunrise in Altadena?
Around 6:24 AM in mid-November, and sunset around 4:49 PM. Today’s exact times are shown above.
Where does this Altadena weather forecast come from?
From the National Weather Service (NOAA), the official U.S. weather agency, for the exact coordinates of Altadena.
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