• Today

    Jul 27

    91°Lo 72°

    A thunderstorm around

    Fair for home energy
    • Avg
      RealFeel
      90°
    • Hi
      RealFeel
      101°
    • Wind
      Speed
      4 mph
  • Thu

    Jul 28

    88°Lo 71°

    A heavy thunderstorm

    Fair for home energy
    • Avg
      RealFeel
      88°
    • Hi
      RealFeel
      102°
    • Wind
      Speed
      4 mph
    more
  • Fri

    Jul 29

    83°Lo 67°

    A couple of thunderstorms

    Poor for home energy
    • Avg
      RealFeel
      82°
    • Hi
      RealFeel
      95°
    • Wind
      Speed
      6 mph
    more
  • Sat

    Jul 30

    85°Lo 69°

    Couple of showers, t-storms

    Poor for home energy
    • Avg
      RealFeel
      82°
    • Hi
      RealFeel
      95°
    • Wind
      Speed
      4 mph
    more
  • Sun

    Jul 31

    82°Lo 68°

    Mostly cloudy with a t-storm

    Poor for home energy
    • Avg
      RealFeel
      82°
    • Hi
      RealFeel
      93°
    • Wind
      Speed
      5 mph
    more
Next Previous
Next 8 hours >
  Wed
9am
10am 11am 12pm 1pm 2pm 3pm 4pm
  9am 10am 11am 12pm 1pm 2pm 3pm 4pm
Forecast
Partly Cloudy
Partly Cloudy
Partly Cloudy
Partly Cloudy
Partly Cloudy
Partly Cloudy
Partly Cloudy
Partly Cloudy
Temp (°F) 79° 82° 85° 87° 89° 90° 91° 90°
RealFeel® 86° 89° 94° 99° 100° 101° 101° 99°
Humidity 76% 64% 57% 53% 50% 47% 47% 48%
   
  9am 10am 11am 12pm 1pm 2pm 3pm 4pm
Rain
 
0%
 
0%
 
1%
 
1%
 
3%
 
8%
 
8%
 
12%
Snow
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
Ice
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
   
  9am 10am 11am 12pm 1pm 2pm 3pm 4pm
Wind (mph) 5 NNW 5 NW 5 NNW 4 NW 4 NW 4 NW 4 WNW 4 WNW
UV Index 2 3 5 6 6 6 5 4
Cloud Cover 70% 70% 70% 70% 70% 70% 70% 70%
Dew Point 71° 68° 68° 69° 68° 68° 68° 68°
Middle Grid line 95 F Middle Grid line 90 F Middle Grid line 85 F Middle Grid line 80 F Middle Grid line 75 F

Temperature History - Jul 27

more Historical Weather Data >
  Today Normal Record 7/27/2015
High 91° 85° N/A 82°
Low 72° 69° N/A 70°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:05 AM with 14:19 of sunlight, then sets at 8:24 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 12:42 AM with 13:41 of moolight, then sets at 2:23 PM

Rockville Weather Report

Heat wave to deteriorate across northeastern US as downpours unleash up to 2 inches of rain

July 27, 2016; 9:23 AM ET

As July draws to a close, a storm system swinging up from the Deep South will bring downpours to the northeastern U.S. and break the back of an extended heat wave. more >

Wed. Home Energy Efficiency

Wed. Degree Days

Wed. UV Index