• Today

    May 21

    79°Lo 55°

    A strong thunderstorm

    Extreme indoor dust & dander levels
    • Grass
      Pollen
      2 - Low
    • Ragweed
      Pollen
      5 - Low
    • Tree
      Pollen
      650 - High

  • Wed

    May 22

    69°Lo 49°

    Rain and a thunderstorm

    Extreme indoor dust & dander levels
    • Grass
      Pollen
      2 - Low
    • Ragweed
      Pollen
      5 - Low
    • Tree
      Pollen
      650 - High
    more

  • Thu

    May 23

    57°Lo 32°

    Cooler with a few showers

    Very High indoor dust & dander levels
    • Grass
      Pollen
      2 - Low
    • Ragweed
      Pollen
      5 - Low
    • Tree
      Pollen
      650 - High
    more

  • Fri

    May 24

    60°Lo 30°

    Mostly sunny

    Extreme indoor dust & dander levels
    • Precip
      0%
    • Wind
      Speed
      7 mph
    • Cloud
      Cover
      11%
    more

  • Sat

    May 25

    66°Lo 32°

    Partly sunny

    Very High indoor dust & dander levels
    • Precip
      0%
    • Wind
      Speed
      5 mph
    • Cloud
      Cover
      26%
    more
Next Previous
Hi 79° RealFeel® 79° Precipitation 55%

Day

N

E

S

W

  • SW 9 mph
  • Gusts: 15 mph

Mostly cloudy with a strong thunderstorm; thunderstorms can bring hail and damaging winds

  • Max UV Index: 6 (High)
  • Thunderstorms: 91%
  • Precipitation: 0.3 in
  • Rain: 0.3 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 2 hrs
  • Hours of Rain: 2 hrs
Lo 55° RealFeel® 53° Precipitation 55%

Night

N

E

S

W

  • SW 4 mph
  • Gusts: 11 mph

Mostly cloudy and mild with a shower or thunderstorm around

  • Max UV Index: N/A
  • Thunderstorms: 91%
  • Precipitation: 0.1 in
  • Rain: 0.1 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 1 hrs
  • Hours of Rain: 1 hrs

Tustin Pollen Levels - May 21

  • Extreme
  • Very High
  • High
  • Moderate
  • Low

  • Grass

    Pollen

    Low

  • Weed

    Pollen

    Low

  • Tree

    Pollen

    High

  • Mold

    Pollen

    Low

Temperature History - May 21

more Historical Weather Data >
  Today Normal Record 5/21/2012
High 79° 67° 88° (1972) 64°
Low 55° 43° 23° (1954) 44°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:10 AM with 14:57 of sunlight, then sets at 9:07 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 5:13 PM with 11:05 of moolight, then sets at 4:18 AM

Smoke Alert: The Hidden Dangers of E-Cigarettes

May 20, 2013; 5:00 AM ET E-cigarette manufacturers claim the devices can help a person quit smoking but have those claims ever been proven?

Tue. Pollen

Tue. Dust & Dander

Tue. Wind Maps