• Early AM

    May 19

    Lo 58°

    A passing shower

    Dust & Dander Weather
    • Grass
      Pollen
      12 - Moderate
    • Ragweed
      Pollen
      0 - Low
    • Tree
      Pollen
      350 - High
    more

  • Today

    May 19

    75°Lo 63°

    Spotty afternoon showers

    Extreme indoor dust & dander levels
    • Grass
      Pollen
      12 - Moderate
    • Ragweed
      Pollen
      5 - Low
    • Tree
      Pollen
      350 - High
    more

  • Mon

    May 20

    83°Lo 62°

    Warmer with a thunderstorm

    Extreme indoor dust & dander levels
    • Grass
      Pollen
      12 - Moderate
    • Ragweed
      Pollen
      5 - Low
    • Tree
      Pollen
      350 - High

  • Tue

    May 21

    90°Lo 64°

    An afternoon thunderstorm

    Extreme indoor dust & dander levels
    • Precip
      55%
    • Wind
      Speed
      5 mph
    • Cloud
      Cover
      69%
    more

  • Wed

    May 22

    87°Lo 65°

    A thunderstorm in the area

    Extreme indoor dust & dander levels
    • Precip
      46%
    • Wind
      Speed
      5 mph
    • Cloud
      Cover
      52%
    more
Next Previous
Hi 83° RealFeel® 87° Precipitation 55%

Day

N

E

S

W

  • S 4 mph
  • Gusts: 7 mph

Clouds and breaks of sun; humid and warmer with a shower or thunderstorm around

  • Max UV Index: 4 (Moderate)
  • Thunderstorms: 60%
  • Precipitation: 0.1 in
  • Rain: 0.1 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 1 hrs
  • Hours of Rain: 1 hrs
Lo 62° RealFeel® 62° Precipitation 55%

Night

N

E

S

W

  • N 2 mph
  • Gusts: 4 mph

An evening shower or thunderstorm around; otherwise, plenty of clouds

  • Max UV Index: N/A
  • Thunderstorms: 40%
  • Precipitation: 0.05 in
  • Rain: 0.05 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 0.5 hrs
  • Hours of Rain: 0.5 hrs

Frederick Pollen Levels - May 20

  • Extreme
  • Very High
  • High
  • Moderate
  • Low

  • Grass

    Pollen

    Moderate

  • Weed

    Pollen

    Low

  • Tree

    Pollen

    High

  • Mold

    Pollen

    Low

Temperature History - May 20

more Historical Weather Data >
  Today Normal Record 5/20/2012
High 83° 78° N/A 84°
Low 62° 55° N/A 54°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 5:52 AM with 14:29 of sunlight, then sets at 8:21 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 3:28 PM with 11:48 of moolight, then sets at 3:16 AM

How Weather Impacts Seasonal Allergy Symptoms

May 18, 2013; 5:00 AM ET If you suffer with seasonal allergies, the weather can relieve or worsen your symptoms. Marja Martinez has the details.

Mon. Pollen

Mon. Dust & Dander

Mon. Wind Maps