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UTC-07:00
Altadena, United States Snapshot 2026
Where is Altadena?
Altadena, United States
- Continent
- Americas
- Country
- United States
- City
- Altadena
- Population
- 42.8K
- Elevation
- 414 m
- Coordinates
- 34.19°, -118.13°
Altadena is a city in United States with a population of approximately 42.8K. Average temperatures range from 8°C (46°F) in January to 34°C (94°F) in August. The best time to visit is April, May, June, September, October. The city sits at an elevation of 414 m above sea level.
Time in Altadena right now
Open full time & time zone page 10:47 47
Monday, June 15, 2026
IANA time zone
America/Los_Angeles
Daylight saving
DST in effect
PST / PDT
Next DST change
November 1
backward -1h
Live weather in Altadena
Daylight in Altadena today
View full sunrise & sunset page Sunrise
Sunset
Day length
14h 25m
Climate normals for Altadena
Long-term monthly averages based on historical data.
January
Good 
February
Good 
March
Good April best
Excellent May best
Excellent June best
Excellent July
Good August
Good September best
Excellent October best
Excellent November
Good December
Good | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 18°C / 8°C | 16°C / 5°C | 6days (88 mm) Good | 8.1h Good | 61% Muggy | 3.7 Moderate | Good | View Details |
| February | 20°C / 8°C | 18°C / 5°C | 7days (82 mm) Good | 8.9h Good | 58% Moderate | 4.3 Moderate | Good | View Details |
| March | 20°C / 8°C | 19°C / 6°C | 9days (86 mm) Wet | 10h Excellent | 67% Muggy | 5.9 High | Good | View Details |
| April best | 24°C / 11°C | 24°C / 9°C | 3days (19 mm) Excellent | 11.7h Excellent | 59% Moderate | 7.1 Very High | Excellent | View Details |
| May best | 26°C / 13°C | 26°C / 12°C | 3days (11 mm) Excellent | 12.6h Excellent | 63% Muggy | 7.9 Very High | Excellent | View Details |
| June best | 31°C / 17°C | 32°C / 17°C | 0days (1 mm) Excellent | 13.3h Excellent | 54% Moderate | 8.3 Very High | Excellent | View Details |
| July | 34°C / 20°C | 35°C / 20°C | 0days (1 mm) Excellent | 13.2h Excellent | 48% Moderate | 8.5 Very High | Good | View Details |
| August | 34°C / 20°C | 35°C / 21°C | 1days (9 mm) Excellent | 12.2h Excellent | 47% Moderate | 7.9 Very High | Good | View Details |
| September best | 32°C / 19°C | 32°C / 19°C | 2days (10 mm) Excellent | 11.3h Excellent | 52% Moderate | 6.9 High | Excellent | View Details |
| October best | 29°C / 15°C | 27°C / 13°C | 2days (13 mm) Excellent | 10.3h Excellent | 46% Moderate | 5.7 High | Excellent | View Details |
| November | 24°C / 11°C | 21°C / 8°C | 3days (35 mm) Excellent | 8.9h Good | 45% Moderate | 4.1 Moderate | Good | View Details |
| December | 20°C / 9°C | 17°C / 5°C | 5days (72 mm) Good | 7.8h Good | 54% Moderate | 3.4 Moderate | Good | View Details |
Monthly Temperatures
HighLow
Line chart showing monthly temperatures. Jan: 18°C / 8°C . Feb: 20°C / 8°C . Mar: 20°C / 8°C . Apr: 24°C / 11°C . May: 26°C / 13°C . Jun: 31°C / 17°C . Jul: 34°C / 20°C . Aug: 34°C / 20°C . Sep: 32°C / 19°C . Oct: 29°C / 15°C . Nov: 24°C / 11°C . Dec: 20°C / 9°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 88 mm. Feb: 82 mm. Mar: 86 mm. Apr: 19 mm. May: 11 mm. Jun: 1 mm. Jul: 1 mm. Aug: 9 mm. Sep: 10 mm. Oct: 13 mm. Nov: 35 mm. Dec: 72 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 61%. Feb: 58%. Mar: 67%. Apr: 59%. May: 63%. Jun: 54%. Jul: 48%. Aug: 47%. Sep: 52%. Oct: 46%. Nov: 45%. Dec: 54%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 12 km/h . Feb: 12 km/h . Mar: 13 km/h . Apr: 13 km/h . May: 13 km/h . Jun: 13 km/h . Jul: 13 km/h . Aug: 13 km/h . Sep: 12 km/h . Oct: 11 km/h . Nov: 11 km/h . Dec: 11 km/h .
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 4. Feb: UV 4. Mar: UV 6. Apr: UV 7. May: UV 8. Jun: UV 8. Jul: UV 9. Aug: UV 8. Sep: UV 7. Oct: UV 6. Nov: UV 4. Dec: UV 3.
Frequently Asked Questions
Altadena has a population of approximately 42.8K.
The best months to visit Altadena are April, May, June, September, October, when temperatures are pleasant and rainfall is lower.
Altadena receives approximately 427mm of rainfall annually across 41 rainy days.
Altadena is located in United States, in the Americas region.
Altadena sits at an elevation of 414 m (1,358 ft) above sea level.