• Today

    May 21

    87°Lo 66°

    A thunderstorm in spots

    Poor for home energy
    • Avg
      RealFeel
      82°
    • Hi
      RealFeel
      93°
    • Wind
      Speed
      5 mph

  • Wed

    May 22

    87°Lo 66°

    Thundershower

    Poor for home energy
    • Avg
      RealFeel
      81°
    • Hi
      RealFeel
      91°
    • Wind
      Speed
      7 mph
    more

  • Thu

    May 23

    81°Lo 54°

    A couple of thunderstorms

    Poor for home energy
    • Avg
      RealFeel
      76°
    • Hi
      RealFeel
      85°
    • Wind
      Speed
      7 mph
    more

  • Fri

    May 24

    73°Lo 45°

    Variable clouds; not as warm

    Poor for home energy
    • Avg
      RealFeel
      62°
    • Hi
      RealFeel
      72°
    • Wind
      Speed
      12 mph
    more

  • Sat

    May 25

    70°Lo 45°

    Mostly sunny and beautiful

    Poor for home energy
    • Avg
      RealFeel
      59°
    • Hi
      RealFeel
      74°
    • Wind
      Speed
      8 mph
    more
Next Previous
Hi 87° RealFeel® 93° Precipitation 40%

Day

N

E

S

W

  • SSW 5 mph
  • Gusts: 10 mph

Very warm and humid with some sun; a shower or thunderstorm in spots this afternoon

  • Max UV Index: 7 (High)
  • Thunderstorms: 60%
  • Precipitation: 0.04 in
  • Rain: 0.04 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 0.5 hrs
  • Hours of Rain: 0.5 hrs
Lo 66° RealFeel® 63° Precipitation 55%

Night

N

E

S

W

  • S 4 mph
  • Gusts: 7 mph

An evening shower or thunderstorm around; otherwise, partly cloudy, warm and humid

  • Max UV Index: N/A
  • Thunderstorms: 60%
  • Precipitation: 0.05 in
  • Rain: 0.05 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 0.5 hrs
  • Hours of Rain: 0.5 hrs

Temperature History - May 21

more Historical Weather Data >
  Today Normal Record 5/21/2012
High 87° 76° 92° (1996) 70°
Low 66° 53° 33° (1992) 64°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 5:51 AM with 14:29 of sunlight, then sets at 8:20 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 4:33 PM with 11:18 of moolight, then sets at 3:51 AM

Top Story

Gaithersburg Weather Report

Summerlike Tuesday in DC, Philadelphia, New York

May 21, 2013; 5:03 AM ET

Rising temperatures and humidity across the mid-Atlantic will have it feeling like the end of June. more >

DIY Deodorant and Lotion

May 17, 2013; 5:00 AM ET Learn how to save money by making your own deodorants and lotions with all-natural ingredients.

Tue. Home Energy Efficiency

Tue. Degree Days

Tue. UV Index