• Early AM

    Aug 21

    Lo 65°

    Increasing clouds

    Ragweed Pollen Weather
    • Grass
      Pollen
      2 - Low
    • Ragweed
      Pollen
      5 - Low
    • Tree
      Pollen
      0 - Low
    more
  • Today

    Aug 21

    87°Lo 66°

    T-storms possible in the a.m.

    Low ragweed pollen levels
    • Grass
      Pollen
      2 - Low
    • Ragweed
      Pollen
      5 - Low
    • Tree
      Pollen
      0 - Low
  • Fri

    Aug 22

    82°Lo 67°

    Couple of thunderstorms

    Low ragweed pollen levels
    • Grass
      Pollen
      2 - Low
    • Ragweed
      Pollen
      5 - Low
    • Tree
      Pollen
      0 - Low
    more
  • Sat

    Aug 23

    78°Lo 60°

    A brief shower or two

    Low ragweed pollen levels
    • Precip
      63%
    • Wind
      Speed
      5 mph
    • Cloud
      Cover
      87%
    more
  • Sun

    Aug 24

    79°Lo 57°

    More clouds than sun

    Low ragweed pollen levels
    • Precip
      11%
    • Wind
      Speed
      5 mph
    • Cloud
      Cover
      72%
    more
Next Previous
Hi 87° RealFeel® 95° Precipitation 55%

Day

N

E

S

W

  • WSW 3 mph
  • Gusts: 8 mph

Humid; fog this morning with thunderstorms possible followed by a t-storm this afternoon

  • Max UV Index: 6 (High)
  • Thunderstorms: 60%
  • 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
Lo 66° RealFeel® 65° Precipitation 55%

Night

N

E

S

W

  • N 2 mph
  • Gusts: 4 mph

Mostly cloudy with a shower or thunderstorm in the area

  • Max UV Index: N/A
  • Thunderstorms: 40%
  • Precipitation: 0.06 in
  • Rain: 0.06 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 1 hrs
  • Hours of Rain: 1 hrs

Frederick Pollen Levels - August 21

  • Extreme
  • Very High
  • High
  • Moderate
  • Low
  • Grass

    Pollen

    Low

  • Weed

    Pollen

    Low

  • Tree

    Pollen

    Low

  • Mold

    Pollen

    Low

Temperature History - Aug 21

more Historical Weather Data >
  Today Normal Record 8/21/2013
High 87° 86° N/A 88°
Low 66° 66° N/A 61°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:28 AM with 13:30 of sunlight, then sets at 7:58 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 2:58 AM with 14:26 of moolight, then sets at 5:24 PM

Top Story

Frederick Weather Report

DC: Downpour, Flooding Risk to Increase

August 20, 2014; 12:00 PM ET

A wedge of dry air will slowly erode at midweek and will allow drenching showers and thunderstorms to survive the trip into Washington, D.C., from the Midwest. more >

Thu. Pollen

Thu. Dust & Dander

Thu. Wind Maps