• Today

    Aug 31

    88°Lo 67°

    Humid with variable clouds

    Watch for hair frizz
    • Wind
      Gust
      9 mph
    • Precip
      55%
    • Hours of Precip
      1
    more
  • Tue

    Sep 1

    91°Lo 69°

    Hot with plenty of sunshine

    Advisory for hair frizz
    • Wind
      Gust
      6 mph
    • Precip
      8%
    • Hours of Precip
      0
  • Wed

    Sep 2

    91°Lo 71°

    Humid with partial sunshine

    Advisory for hair frizz
    • Wind
      Gust
      6 mph
    • Precip
      12%
    • Hours of Precip
      0.5
    more
  • Thu

    Sep 3

    93°Lo 71°

    A p.m. t-storm in spots

    Advisory for hair frizz
    • Wind
      Gust
      8 mph
    • Precip
      42%
    • Hours of Precip
      2
    more
  • Fri

    Sep 4

    87°Lo 68°

    Periods of sun

    Advisory for hair frizz
    • Wind
      Gust
      9 mph
    • Precip
      25%
    • Hours of Precip
      0
    more
Next Previous
< Previous 8 hours Next 8 hours >
  Tue
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Forecast
Mostly Clear
Mostly Sunny
Sunny
Sunny
Sunny
Sunny
Sunny
Mostly Sunny
Temp (°F) 67° 70° 72° 76° 81° 85° 88° 89°
RealFeel® 68° 74° 77° 83° 89° 94° 98° 98°
Humidity 100% 98% 89% 79% 64% 55% 50% 44%
   
  6am 7am 8am 9am 10am 11am 12pm 1pm
Rain
 
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Snow
 
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Ice
 
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  6am 7am 8am 9am 10am 11am 12pm 1pm
Wind (mph) 4 W 4 WNW 4 NW 4 NW 4 NNW 5 NNW 5 NNW 5 NNW
UV Index 0 0 1 2 3 5 6 6
Cloud Cover 26% 26% 5% 5% 4% 5% 6% 10%
Dew Point 67° 70° 69° 69° 68° 67° 67° 64°
Middle Grid line 90 F 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 - Sep 1

more Historical Weather Data >
  Today Normal Record 9/1/2014
High 91° 84° 99° (1980) 95°
Low 69° 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: Sizzling Heat Wave to Start September

August 31, 2015; 9:50 AM ET

A push of summery heat and humidity will arrive in the Washington D.C. and Baltimore areas this week as September begins. more >

The History Behind the UV Index

Nov 12, 2012; 5:00 AM ET The UV index has been around since the early 1990s. It was created to help you plan outdoor activities in hopes to limit overexposure to the sun. Jeannette Calle has more.

Tue. Hair Frizz

Tue. Wind Maps

Tue. UV Index