Altadena, CA 91003 Weather

Los Angeles County1:02 PM PDT34.19°N, 118.13°W

Current conditions

Rain Likely
72°
Rain Likely
Feels like 71°
High 73°·Low 57°
WindNNW 8 mph
Humidity54%
Dew point54°
Cloud cover88%
UV index6 High
Sunrise7:03 AM
Sunset6:12 PM

Observed at LOS ANGELES DOWNTOWN · 37 min ago

Forecast

10-day

  • Wednesday

    Rain after 11am. Mostly cloudy, with a high near 73. South southeast wind 5 to 10 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.

  • Wednesday Night

    Rain before 11pm, then rain and a slight chance of thunderstorms. Cloudy, with a low around 57. Southeast wind 5 to 10 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.

  • Thursday

    Rain and a slight chance of thunderstorms before 5pm, then a chance of rain showers. Mostly cloudy, with a high near 66. South wind 0 to 5 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

National Weather Service forecast updated 16 hrs ago.

Hourly

Hourly forecast
  1. Now Rain Likely 69°57%
  2. 2 PM Rain Likely 68°57%
  3. 3 PM Rain Likely 68°57%
  4. 4 PM Rain Likely 69°57%
  5. 5 PM Rain 66°81%
  6. 6 PM Rain 65°81%
  7. 7 PM Rain 64°81%
  8. 8 PM Rain 62°81%
  9. 9 PM Rain 61°81%
  10. 10 PM Rain 60°81%
  11. 11 PM Rain 60°97%
  12. Thu12 AM Rain 61°97%
  13. 1 AM Rain 61°97%
  14. 2 AM Rain 61°97%
  15. 3 AM Rain 61°97%
  16. 4 AM Rain 60°97%
  17. 5 AM Rain 61°97%
  18. 6 AM Rain 60°97%
  19. 7 AM Rain 60°97%
  20. 8 AM Rain 60°97%
  21. 9 AM Rain 60°97%
  22. 10 AM Rain 61°97%
  23. 11 AM Rain 61°92%
  24. 12 PM Rain 62°92%

10-day forecast

Details
  1. TonightOct 20 Partly Cloudy Partly Cloudy58°
  2. TodayOct 21 Rain Rain97%57°73°
  3. ThuOct 22 Rain Rain97%52°66°
  4. FriOct 23 Sunny Sunny53°71°
  5. SatOct 24 Sunny Sunny57°76°
  6. SunOct 25 Sunny Sunny58°78°
  7. MonOct 26 Sunny Sunny59°79°
  8. TueOct 27 Mostly Sunny Mostly Sunny78°
  9. WedOct 28 Cloudy Cloudy68°82°
  10. ThuOct 29 Cloudy Cloudy62°80°

Days after the National Weather Service's seven are MET Norway's outlook, a computer model with no forecaster's review.

Radar

Full map
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Weather news near Altadena

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Air quality

25
Good
Ozone

Air quality is satisfactory, and air pollution poses little or no risk.

Forecast

  • WedGood (50)
  • ThuGood (38)

W San Gabriel Vly, CA reporting area · 2 hrs ago. Data from AirNow (EPA and its state, local and tribal partners); preliminary and subject to change.

Sun & moon

Sunrise 7:03 AM
Sunset 6:12 PM
Daylight 11 h 8 min (−2 min 1 s tomorrow)
Waxing Gibbous · 79% lit
Moonrise 3:41 PM Moonset 2:25 AM
Full moon Oct 26 New moon Nov 9

Nearby

Forecasters' discussion

From the National Weather Service office in LOX, issued 2 hrs ago

Synopsis

21/227 AM.

Widespread rain will develop later today and continue into Thursday with a chance of thunderstorms. A weak Santa Ana will develop in the storm's wake by the weekend for dry and warmer conditions.

Long Term (sat-tue)

21/227 AM.

Weak ridging and weak (1 to 3 mb) offshore flow from both the east and north will be in place for the entire xtnd period. The best upper level support will be on Saturday when there will be 30 to 40 mph gusts csts/vlys and as high as 50 mph in the mtns. The winds will be weaker starting Sunday.

High pressure and offshore flow should keep the skies clear.

There will be decent warming on Saturday (4 to 6 degrees) and then 1 or 2 degrees of extra warming Sun and Mon. Tuesday will cool some as the ridge and offshore flow weaken substantially. Cst/Vly temps will be a little above normal while the interior will be several degrees blo normal.

A quick look at the AI long range models shows dry conditions through the end of the month.

Aviation

21/1722Z.

At 1715Z, at KLAX, there was no marine layer nor an inversion.

Low to moderate confidence in 18Z TAF package. Timing of rain could be off by +/- 2 hours of current forecasts. There is a 50% chance of MVFR CIGs with the rain.

There is a 10-20% chance of TSRA through the period with the chances spreading south and east this afternoon and evening.

KLAX...Low confidence in 18Z TAF. Timing of rain may be +/- 2 hours of current forecasts. There is a 50% chance that CIGs remain at VFR levels through the period. THere is a 20% chance of TSRA after 00Z. There is 30% chance of an easterly wind component of 7-10 knots after 22Z.

KBUR...Low confidence in 18Z TAF. Timing of rain may be +/- 2 hours of current forecasts. There is a 50% chance that CIGs remain at VFR levels through the period.

Marine

21/713 AM.

For the Outer Waters, high confidence in current forecast. Through this evening, there is a 70-80% chance of Small Craft Advisory (SCA) level winds around Point Conception with winds and seas remaining below SCA levels elsewhere. Late Thursday and continuing through Friday night, winds are expected to increase to SCA levels. For Saturday through Sunday, winds and seas will remain below SCA levels.

For the Inner Waters north of Point Sal, moderate to high confidence in current forecast. Today through Thursday, high confidence in winds and seas remaining below SCA levels. On Friday, there is a 50% chance of SCA level winds in the afternoon and evening hours. On Saturday and Sunday, high confidence in winds and seas remaining below SCA levels.

For the Inner Waters south of Point Conception, moderate to high confidence in current forecast. Through this evening, there is a 60-80% chance of SCA level southeasterly winds across all the southern Inner Waters. For Thursday through Sunday, high confidence in winds and seas remaining below SCA levels for most areas. The only exception will be the western half of the Santa Barbara Channel with a 50-70% chance of SCA level winds on Thursday and Friday.

Today through Thursday, showers and isolated thunderstorms will impact all of the coastal waters. Any thunderstorms that develop will be capable of producing gusty/erratic winds, locally rough seas and even waterspouts.

Forecasts, observations and alerts in the United States come from the National Weather Service (NOAA); radar from NOAA's Multi-Radar Multi-Sensor system; satellite imagery from NASA's Global Imagery Browse Services (GIBS) and NOAA's GOES satellites; the map from the U.S. Geological Survey's National Map; air quality from AirNow (EPA and its partners); hurricane information from the National Hurricane Center; climate normals and records from NOAA's Regional Climate Centers (ACIS). Forecasts outside the United States and the UV index: MET Norway (CC BY 4.0); observations outside the U.S.: airport reports via NOAA's Aviation Weather Center. Place names: GeoNames (CC BY 4.0). Data are copied on a schedule and may lag the sources; for warnings that affect your safety, follow your local National Weather Service office and emergency officials. Weather news is drawn from the 4Conservative index and reflects what the press published. Terms of use.