• Today

    May 4

    69°Lo 55°

    Mostly sunny

    Neutral weather for asthma
    • Hi
      RealFeel
      74°
    • UV
      9 - Very High
    • Air Qual.
      Moderate
  • Tue

    May 5

    68°Lo 55°

    Low clouds break for some sun

    Beneficial weather for asthma
    • Hi
      RealFeel
      71°
    • UV
      6 - High
    • Air Qual.
      Good
    more
  • Wed

    May 6

    68°Lo 54°

    Mostly cloudy

    Beneficial weather for asthma
    • Hi
      RealFeel
      68°
    • UV
      4 - Moderate
    • Air Qual.
      Good
    more
  • Thu

    May 7

    66°Lo 52°

    Mostly cloudy, a shower; cool

    Beneficial weather for asthma
    • Hi
      RealFeel
      68°
    • UV
      6 - High
    • Cloud
      Cover
      78%
    more
  • Fri

    May 8

    65°Lo 51°

    Mainly cloudy, a shower; cool

    Beneficial weather for asthma
    • Hi
      RealFeel
      69°
    • UV
      8 - Very High
    • Cloud
      Cover
      76%
    more
Next Previous
Hi 69° RealFeel® 74° Precipitation 7%

Day

N

E

S

W

  • SW 8 mph
  • Gusts: 14 mph

Mostly sunny

  • Max UV Index: 9 (Very High)
  • Thunderstorms: 4%
  • Precipitation: 0 in
  • Rain: 0 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 0 hrs
  • Hours of Rain: 0 hrs
Lo 55° RealFeel® 54° Precipitation 3%

Night

N

E

S

W

  • SW 5 mph
  • Gusts: 9 mph

Mainly clear this evening; low clouds late

  • Max UV Index: N/A
  • Thunderstorms: 0%
  • Precipitation: 0 in
  • Rain: 0 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 0 hrs
  • Hours of Rain: 0 hrs

Temperature History - May 4

more Historical Weather Data >
  Today Normal Record 5/4/2014
High 69° 73° N/A 74°
Low 55° 52° N/A 52°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 5:59 AM with 13:37 of sunlight, then sets at 7:36 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 8:21 PM with 10:53 of moolight, then sets at 7:14 AM

Lake Forest Weather Report

Los Angeles: Cooler Weather to Return for First Week of May

May 4, 2015; 7:40 AM ET

Following several days of warm weather, temperatures will slide across the Los Angeles area, bringing for more pleasant weather through the weekend and into the new week. more >

The Dangers of Bus Travel

Dec 10, 2012; 5:00 AM ET While bus transportation is one of the most affordable, it is important to know which motor coach companies rank highest in safety.

Mon. Air Quality

Mon. Asthma Risk

Mon. UV Index