• Tonight

    Sep 1

    Lo 68°

    Partly cloudy and humid

    Home Energy Efficiency Weather
    • Avg
      RealFeel
      83°
    • Hi
      RealFeel
      97°
    • Wind
      Speed
      4 mph
  • Wed

    Sep 2

    91°Lo 69°

    Partly sunny, hot and humid

    Fair for home energy
    • Avg
      RealFeel
      85°
    • Hi
      RealFeel
      99°
    • Wind
      Speed
      4 mph
    more
  • Thu

    Sep 3

    91°Lo 69°

    Partly sunny, hot and humid

    Fair for home energy
    • Avg
      RealFeel
      85°
    • Hi
      RealFeel
      97°
    • Wind
      Speed
      6 mph
    more
  • Fri

    Sep 4

    85°Lo 69°

    Clouds and sun with a t-storm

    Poor for home energy
    • Avg
      RealFeel
      82°
    • Hi
      RealFeel
      93°
    • Wind
      Speed
      6 mph
    more
  • Sat

    Sep 5

    80°Lo 58°

    Times of clouds and sun

    Poor for home energy
    • Avg
      RealFeel
      71°
    • Hi
      RealFeel
      83°
    • Wind
      Speed
      7 mph
    more
Next Previous
Next 8 hours >
  Tue
12am
1am 2am 3am 4am 5am 6am 7am
  12am 1am 2am 3am 4am 5am 6am 7am
Forecast
Mostly Clear
Partly Cloudy
Mostly Clear
Cloudy
Cloudy
Mostly Cloudy
Cloudy
Partly Sunny
Temp (°F) 73° 72° 72° 71° 70° 69° 66° 70°
RealFeel® 75° 75° 75° 73° 72° 72° 69° 76°
Humidity 85% 90% 92% 91% 92% 93% 100% 99%
   
  12am 1am 2am 3am 4am 5am 6am 7am
Rain
 
4%
 
2%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
Snow
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
Ice
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
   
  12am 1am 2am 3am 4am 5am 6am 7am
Wind (mph) 4 S 4 SW 4 SSW 2 SSW 2 SW 1 SW 1 SSW 2 SSW
UV Index 0 0 0 0 0 0 0 0
Cloud Cover 25% 44% 29% 63% 72% 79% 68% 37%
Dew Point 68° 69° 69° 68° 67° 67° 66° 70°
Middle Grid line 75 F Middle Grid line 70 F Middle Grid line 65 F

Temperature History - Sep 1

more Historical Weather Data >
  Today Normal Record 9/1/2014
High 91° 84° 99° (1980) 95°
Low 68° 67° 50° (1890) 76°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:37 AM with 13:03 of sunlight, then sets at 7:40 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 9:38 PM with 13:27 of moolight, then sets at 11:05 AM

Rockville Weather Report

DC, Baltimore: July-like Heat to Continue Through Labor Day

September 1, 2015; 5:39 PM ET

The vast majority of the time through the Labor Day weekend will feature sunshine with unseasonably hot afternoons around Washington, D.C., and Baltimore. 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.

Tue. Home Energy Efficiency

Tue. Degree Days

Tue. UV Index