• Tonight

    Jul 30

    Lo 70°

    A heavy evening thunderstorm

    Migraine Headache Weather
    • Hi
      RealFeel
      95°
    • UV
      4 - Moderate
    • Cloud
      Cover
      82%
    more
  • Sun

    Jul 31

    89°Lo 71°

    Heavy thunderstorms

    Beneficial weather for migraines
    • Hi
      RealFeel
      103°
    • UV
      5 - High
    • Cloud
      Cover
      77%
  • Mon

    Aug 1

    89°Lo 67°

    Clouds and sun with a t-storm

    Beneficial weather for migraines
    • Hi
      RealFeel
      98°
    • UV
      5 - High
    • Cloud
      Cover
      50%
    more
  • Tue

    Aug 2

    85°Lo 65°

    Periods of sun

    Beneficial weather for migraines
    • Hi
      RealFeel
      89°
    • UV
      5 - High
    • Cloud
      Cover
      46%
    more
  • Wed

    Aug 3

    83°Lo 68°

    Periods of sun

    Beneficial weather for migraines
    • Hi
      RealFeel
      92°
    • UV
      5 - High
    • Cloud
      Cover
      47%
    more
Next Previous
< Previous 8 hours Next 8 hours >
  Sun
2am
3am 4am 5am 6am 7am 8am 9am
  2am 3am 4am 5am 6am 7am 8am 9am
Forecast
Cloudy
Mostly Cloudy
Mostly Cloudy
Cloudy
Cloudy
Cloudy
Cloudy
T-storms
Temp (°F) 73° 72° 72° 72° 70° 73° 74° 77°
RealFeel® 77° 77° 76° 76° 74° 80° 83° 84°
Humidity 93% 93% 93% 93% 100% 100% 100% 92%
   
  2am 3am 4am 5am 6am 7am 8am 9am
Rain
 
25%
 
20%
 
20%
 
20%
 
20%
 
25%
 
47%
 
51%
Snow
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
Ice
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
   
  2am 3am 4am 5am 6am 7am 8am 9am
Wind (mph) 5 SSE 4 SSE 4 S 4 SSW 4 SW 4 SW 4 WSW 4 WSW
UV Index 0 0 0 0 0 0 0 2
Cloud Cover 90% 89% 89% 90% 91% 93% 93% 90%
Dew Point 71° 70° 70° 70° 70° 73° 74° 74°
Middle Grid line 80 F 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 7/31/2015
High 89° 84° N/A 86°
Low 71° 69° N/A 63°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:09 AM with 14:11 of sunlight, then sets at 8:20 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 3:55 AM with 14:37 of moolight, then sets at 6:32 PM

Rockville Weather Report

Soaking storms to elevate flash flood threat in northeastern US this weekend

July 30, 2016; 5:21 PM ET

Rounds of drenching showers and heavy thunderstorms will heighten the risk of flash flooding across the northeastern United States through the final weekend of July. more >

Sun. Migraine Headache

Sun. UV Index