• Today

    Aug 20

    90°Lo 66°

    A p.m. t-storm in spots

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

    Aug 21

    85°Lo 66°

    A couple of thunderstorms

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

    Aug 22

    83°Lo 67°

    Couple of thunderstorms

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

    Aug 23

    77°Lo 64°

    Cooler with a shower or two

    Low ragweed pollen levels
    • Precip
      61%
    • Wind
      Speed
      4 mph
    • Cloud
      Cover
      70%
    more
  • Sun

    Aug 24

    77°Lo 62°

    More clouds than sun

    Ragweed Pollen Weather
    • Precip
      25%
    • Wind
      Speed
      5 mph
    • Cloud
      Cover
      88%
    more
Next Previous
< Previous 8 hours Next 8 hours >
  Wed
8pm
9pm 10pm 11pm Thu
12am
1am 2am 3am
  8pm 9pm 10pm 11pm 12am 1am 2am 3am
Forecast
Mostly Cloudy
Mostly Cloudy
Mostly Cloudy
Mostly Cloudy
T-storms
Mostly Cloudy
Mostly Cloudy
Mostly Cloudy
Temp (°F) 75° 72° 72° 70° 69° 68° 67° 67°
RealFeel® 78° 74° 73° 70° 67° 67° 66° 65°
Humidity 88% 91% 90% 89% 90% 92% 93% 93%
   
  8pm 9pm 10pm 11pm 12am 1am 2am 3am
Rain
 
40%
 
34%
 
37%
 
47%
 
51%
 
47%
 
43%
 
47%
Snow
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
Ice
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
   
  8pm 9pm 10pm 11pm 12am 1am 2am 3am
Wind (mph) 4 S 3 SSE 3 SSE 3 SSE 3 S 3 S 3 SSW 2 S
UV Index 0 0 0 0 0 0 0 0
Cloud Cover 75% 77% 84% 87% 83% 76% 76% 76%
Dew Point 71° 70° 69° 67° 66° 66° 65° 65°
Middle Grid line 80 F Middle Grid line 75 F Middle Grid line 70 F Middle Grid line 65 F

Temperature History - Aug 20

more Historical Weather Data >
  Today Normal Record 8/20/2013
High 90° 86° N/A 84°
Low 66° 66° N/A 59°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:27 AM with 13:32 of sunlight, then sets at 7:59 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 2:06 AM with 14:35 of moolight, then sets at 4:41 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 >

Wed. Pollen

Wed. Dust & Dander

Wed. Wind Maps