• Early AM

    Jul 31

    Lo 67°

    Clear

    Ragweed Pollen Weather
    • Grass
      Pollen
      1 - Low
    • Ragweed
      Pollen
      1 - Low
    • Tree
      Pollen
      1 - Low
    more
  • Today

    Jul 31

    88°Lo 65°

    Less humid with plenty of sun

    Low ragweed pollen levels
    • Grass
      Pollen
      1 - Low
    • Ragweed
      Pollen
      1 - Low
    • Tree
      Pollen
      1 - Low
  • Sat

    Aug 1

    89°Lo 64°

    Sun mixing with clouds

    Low ragweed pollen levels
    • Grass
      Pollen
      1 - Low
    • Ragweed
      Pollen
      1 - Low
    • Tree
      Pollen
      1 - Low
    more
  • Sun

    Aug 2

    88°Lo 65°

    Plenty of sunshine

    Low ragweed pollen levels
    • Grass
      Pollen
      1 - Low
    • Ragweed
      Pollen
      1 - Low
    • Tree
      Pollen
      1 - Low
    more
  • Mon

    Aug 3

    92°Lo 70°

    Partly sunny and hot

    Low ragweed pollen levels
    • Grass
      Pollen
      1 - Low
    • Ragweed
      Pollen
      1 - Low
    • Tree
      Pollen
      1 - Low
    more
Next Previous
< Previous 8 hours Next 8 hours >
  Fri
1am
2am 3am 4am 5am 6am 7am 8am
  1am 2am 3am 4am 5am 6am 7am 8am
Forecast
Mostly Clear
Clear
Clear
Clear
Clear
Clear
Sunny
Mostly Sunny
Temp (°F) 72° 71° 70° 68° 67° 67° 68° 71°
RealFeel® 74° 71° 68° 66° 65° 64° 66° 70°
Humidity 81% 81% 77% 76% 77% 76% 73% 72%
   
  1am 2am 3am 4am 5am 6am 7am 8am
Rain
 
5%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
Snow
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
Ice
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
   
  1am 2am 3am 4am 5am 6am 7am 8am
Wind (mph) 4 WNW 5 NW 5 NW 5 NW 6 WNW 6 WNW 7 WNW 7 WNW
UV Index 0 0 0 0 0 0 0 1
Cloud Cover 15% 4% 3% 0% 0% 2% 6% 10%
Dew Point 66° 65° 62° 60° 60° 59° 59° 61°
Middle Grid line 75 F Middle Grid line 70 F Middle Grid line 65 F

Temperature History - Jul 31

more Historical Weather Data >
  Today Normal Record 7/31/2014
High 88° 88° 98° (1999) 85°
Low 65° 66° 50° (1997) 55°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:09 AM with 14:13 of sunlight, then sets at 8:22 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 8:24 PM with 11:08 of moolight, then sets at 7:32 AM

Herndon Weather Report

DC, Baltimore: Heat to Linger, Humidity to Ease Friday, This Weekend

July 30, 2015; 11:40 PM ET

Following the steam bath of this week, the weather around Washington, D.C., and Baltimore will not be in a hurry to cool down. more >

Fri. Pollen

Fri. Dust & Dander

Fri. Wind Maps