• Tonight

    Aug 30

    Lo 70°

    Mostly cloudy and humid

    Home Energy Efficiency Weather
    • Avg
      RealFeel
      79°
    • Hi
      RealFeel
      88°
    • Wind
      Speed
      4 mph
    more
  • Sun

    Aug 31

    88°Lo 70°

    A t-storm in the afternoon

    Poor for home energy
    • Avg
      RealFeel
      82°
    • Hi
      RealFeel
      96°
    • Wind
      Speed
      5 mph
  • Mon

    Sep 1

    85°Lo 68°

    Some sun with a thunderstorm

    Poor for home energy
    • Avg
      RealFeel
      81°
    • Hi
      RealFeel
      94°
    • Wind
      Speed
      5 mph
    more
  • Tue

    Sep 2

    93°Lo 69°

    A t-storm in the afternoon

    Poor for home energy
    • Avg
      RealFeel
      83°
    • Hi
      RealFeel
      97°
    • Wind
      Speed
      5 mph
    more
  • Wed

    Sep 3

    87°Lo 61°

    Clearing and warm

    Poor for home energy
    • Avg
      RealFeel
      75°
    • Hi
      RealFeel
      90°
    • Wind
      Speed
      6 mph
    more
Next Previous
< Previous 8 hours Next 8 hours >
  Sun
4am
5am 6am 7am 8am 9am 10am 11am
  4am 5am 6am 7am 8am 9am 10am 11am
Forecast
Mostly Cloudy
Mostly Cloudy
Mostly Cloudy
Mostly Cloudy
Partly Cloudy
Partly Cloudy
Partly Cloudy
Partly Cloudy
Temp (°F) 71° 70° 71° 71° 72° 74° 78° 81°
RealFeel® 70° 70° 70° 72° 73° 79° 84° 90°
Humidity 88% 91% 89% 93% 92% 88% 79% 73%
   
  4am 5am 6am 7am 8am 9am 10am 11am
Rain
 
6%
 
6%
 
6%
 
6%
 
7%
 
7%
 
6%
 
5%
Snow
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
Ice
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
   
  4am 5am 6am 7am 8am 9am 10am 11am
Wind (mph) 3 S 3 SSE 3 S 4 S 4 SSW 4 SSW 5 SW 5 SW
UV Index 0 0 0 0 0 1 2 4
Cloud Cover 76% 76% 76% 76% 70% 70% 70% 70%
Dew Point 67° 67° 67° 69° 69° 71° 71° 72°
Middle Grid line 85 F Middle Grid line 80 F Middle Grid line 75 F Middle Grid line 70 F Middle Grid line 65 F

Temperature History - Aug 31

more Historical Weather Data >
  Today Normal Record 8/31/2013
High 88° 84° N/A 88°
Low 70° 64° N/A 68°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:37 AM with 13:06 of sunlight, then sets at 7:43 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 12:19 PM with 10:38 of moolight, then sets at 10:57 PM

Top Story

Frederick Weather Report

DC: Summer Heat to Hold Beyond Labor Day

August 30, 2014; 5:00 PM ET

Labor Day weekend traditionally marks the unofficial end to summer, but the weather has another idea in mind around Washington, D.C., with a prolonged stretch of summer heat underway. more >

Energy Efficient Lightbulbs and S.A.D

Sep 8, 2012; 5:00 AM ET With shorter days and colder nights in the fall and winter, some people develop seasonal affective disorder. When shopping for lightbulbs to treat the 'winter blues,'consider energy-efficient bulbs.

Sun. Home Energy Efficiency

Sun. Degree Days

Sun. UV Index