Monrovia, CA 91016 Weather

Los Angeles County1:34 AM PDT34.14°N, 118.00°W

Current conditions

Partly Cloudy
65°
Partly Cloudy
Feels like 65°
High 74°·Low 59° tonight
WindWSW 1 mph
Humidity88%
Dew point61°
Cloud cover48%
UV index0 Low
Sunrise7:03 AM
Sunset6:12 PM

Observed at SANTA FE DAM · 1 hr ago

Forecast

10-day

  • Overnight

    A chance of rain showers after 5am. Partly cloudy, with a low around 59. East southeast wind 0 to 5 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.

  • Wednesday

    Rain showers. Mostly cloudy, with a high near 74. South southeast wind 0 to 10 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

  • Wednesday Night

    Rain showers before 11pm, then showers and thunderstorms. Cloudy, with a low around 57. South southeast wind 0 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New rainfall amounts between 1 and 2 inches possible.

National Weather Service forecast updated 2 hrs ago.

Hourly

Hourly forecast
  1. Now Partly Cloudy 62°12%
  2. 2 AM Partly Cloudy 62°12%
  3. 3 AM Partly Cloudy 60°12%
  4. 4 AM Partly Cloudy 60°12%
  5. 5 AM Chance Rain Showers 60°28%
  6. 6 AM Chance Rain Showers 59°28%
  7. 7 AM Chance Rain Showers 59°28%
  8. 8 AM Chance Rain Showers 62°28%
  9. 9 AM Chance Rain Showers 66°28%
  10. 10 AM Chance Rain Showers 69°28%
  11. 11 AM Rain Showers Likely 72°59%
  12. 12 PM Rain Showers Likely 74°59%
  13. 1 PM Rain Showers Likely 74°59%
  14. 2 PM Rain Showers Likely 69°59%
  15. 3 PM Rain Showers Likely 69°59%
  16. 4 PM Rain Showers Likely 67°59%
  17. 5 PM Rain Showers 62°92%
  18. 6 PM Rain Showers 61°92%
  19. 7 PM Rain Showers 62°92%
  20. 8 PM Rain Showers 62°92%
  21. 9 PM Rain Showers 61°92%
  22. 10 PM Rain Showers 60°92%
  23. 11 PM Showers And Thunderstorms 58°82%
  24. Thu12 AM Showers And Thunderstorms 60°82%

10-day forecast

Details
  1. TonightOct 20 Chance Rain Showers Chance Rain Showers28%59°
  2. TodayOct 21 Rain Showers Rain Showers92%57°74°
  3. ThuOct 22 Showers And Thunderstorms Showers And Thunderstorms89%52°68°
  4. FriOct 23 Sunny Sunny54°73°
  5. SatOct 24 Sunny Sunny56°77°
  6. SunOct 25 Sunny Sunny57°79°
  7. MonOct 26 Sunny Sunny58°81°
  8. TueOct 27 Sunny Sunny79°
  9. WedOct 28 Cloudy Cloudy60°85°
  10. ThuOct 29 Cloudy Cloudy62°85°

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

Radar

Full map
Open the National Weather Service radar (the map here needs JavaScript).

Weather news near Monrovia

More weather news
  • Southern California's wild weather swings continue. Next up, rain

    Southern California is likely in for a solid dose of rain this week, just days after heat and Santa Ana winds helped fuel several wildfires across the region. Forecasters expect the bulk of the rain to roll into the Los…

    LAist·6 hrs ago
  • Incoming Storm Could Bring Up to 3 Inches of Rain to Southland

    A strong October storm was moving toward Southern California Tuesday, with forecasters warning of widespread rain, possible thunderstorms and an increasing risk of localized flooding. “The system is starting to turn the…

    MyNewsLA.com·9 hrs ago
  • Flash-flood risk rises in Southern California, severe storms threaten Arizona

    Satellite image of southwest U.S. at 17:20 UTC on October 20, 2026. Credit: NOAA/GOES-19, Zoom Earth, The Watchers The WPC Excessive Rainfall Discussion issued at 15:33 UTC on October 20 places portions of Southern…

    The Watchers·13 hrs ago
  • October 20, 2026 Tuesday Weather Update

    This is Forecast Post number 1052 — Day 293 of 2026 Day 142 of Atlantic Hurricane Season | YTD: 9 Named Storms, ACE = 18.0 NE Pacific Hurricane Season: YTD: 22 Named Storms, ACE = 344 Author: Dr. Ryan Maue (X…

    Weather Trader·6 hrs ago
  • Storm Could Bring Up to 2 Inches of Rain to Southland

    A strong October storm was moving toward Southern California Tuesday, with forecasters warning of widespread rain, possible thunderstorms and an increasing risk of localized flooding. The National Weather Service said…

    MyNewsLA.com·18 hrs ago
  • October Storm Could Bring Up to 2 Inches of Rain to Southland

    A strong October storm was moving toward Southern California Tuesday, with forecasters warning of widespread rain, possible thunderstorms and an increasing risk of localized flooding. The National Weather Service said…

    MyNewsLA.com·19 hrs ago
  • Cooldown with a chance of rain

    ‘Mostly beneficial’ showers are possible midweek, followed by a weekend warm-up. VOLUNTEERS wait for parishioners at St. Joseph Catholic Church in Placentia. (ROBERT GAUTHIER Los Angeles Times) It’s time to grab those…

    Magzter·23 hrs ago
  • Rain — and potentially lots of it — heading to Southern California

    Widespread rain and possible thunderstorms are headed for Southern California this week, with forecasters on Monday warning that some areas could receive up to 2 inches of rain. The National Weather Service said a…

    Whittier Daily News·1 day ago
  • Cooler temperatures, possible rain headed for Southern California

    It’s time to grab those jackets and pull out the umbrellas because cooler temperatures and a chance of rain is on tap for Southern California by the middle of this week, forecasters say. The region could see widespread…

    Los Angeles Times·1 day ago
  • California storms could bring much-needed rain and relief to wildfire-weary areas

    🔥 FIRE RELIEF: Wet weather is headed for California just in time as wildfires rage across the state, bringing much-needed relief to the fiery conditions this week. CALIFORNIA - As numerous wildfires burn across parts of…

    FOX Weather·2 days ago

Air quality

40
Good
Fine particles (PM2.5)

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

Forecast

  • WedModerate (64)

E San Gabriel Vly, CA reporting area · 1 hr 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 9 min (−2 min 0 s tomorrow)
Waxing Gibbous · 75% lit
Moonrise 3:41 PM Moonset 2:25 AM
Full moon Oct 26 New moon Nov 9

Almanac

Monthly
Normal high / low78° / 59°
Record high100° (1929)
Record low45° (1882)
Wettest0.53 in (1889)
Month to date0.09 in (normal 0.33 in)

Los Angeles Downtown Area, records since 1877. Normals 1991–2020. Data from NOAA's Regional Climate Centers (ACIS).

Nearby

Forecasters' discussion

From the National Weather Service office in LOX, issued 4 hrs ago

Synopsis

20/805 PM.

Widespread rain will develop Wednesday 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)

20/129 PM.

A weak to low end moderate Santa Ana event is expected this weekend but much weaker than the last event. Temperatures should warm up quickly into the upper 70s and 80s most everywhere except for the mountains and deserts. Latest models are indicating peak winds between 30 and 50 mph, strongest in the LA/Ventura mountains.

Aviation

21/0428Z.

At 00Z at KLAX, the marine layer was 800 ft deep. The top of the inversion was at 2600 ft with a temperature of 20 C.

High confidence in VFR TAFs at KPMD and KWJF.

Moderate confidence in MVFR conds at times at remaining sites. Timing may be off +/- 3 hours with CIG height +/- 200 ft of TAF.

Rain is expected for most TAF sites between 12Z-22Z, earliest along the Central Coast to KSBA. There is a 10-20 percent chance of TSRA KSBA and north starting around 18Z. TSRA spreads to KOXR and KCMA Wednesday afternoon, and into LA County after 06Z.

KLAX...Moderate confidence in TAF. There is a 30% chc of lower cigs of OVC008. An east wind component up to 5 kt is possible 12-18Z with a 10 percent chance of brief 8 kt.

Marine

20/925 PM.

Expecting showers to move into the coastal waters as early as tonight as the low approaches from the west. Boaters can expect rain and a chance of thunderstorms and isolated waterspouts spreading from west to southeast. With any thunderstorm there is also the threat of lightning, gusty and erratic winds, small hail, and choppy seas. Winds still do not look too impactful, there is a good chance for periods of Small Craft Advisory (SCA) level (including the nearshore waters) southerly winds Wednesday morning through Wednesday evening. As the system leaves the area Thursday, fairly widespread west to northwest SCA winds will impact much of the coastal waters, creating steep, choppy wind waves.

Then a weak to locally moderate Santa Ana Wind event is likely this weekend, with some localized SCA level gusts possible nearshore in favored areas nearshore adjacent to Ventura and LA Counties.

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 4Search index and reflects what the press published. Terms of use.