Great Falls, Virginia
Current Conditions -  °F | °C
As of 8:52 AM on Thursday 31 Jul 2014 (Local Time) from KIAD Reporting Station
Scattered Clouds Scattered Clouds  
Wind Chill: 67°   Ceiling: Unl
Heat Index: 67°   Visibility: 10mi
Dew Point: 59°   Wind: 0mph
Humidity: 76%   Direction: NA
Pressure: 30.12"   Gusts: NA
Location:  39°N, 77.29°W
Report Text: KIAD 311252Z 00000KT 10SM SCT120 19/15 A3012 RMK AO2 SLP197 T01940150
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Tropical Storm Tracking
Hourly Forecast -  °F | °C
Hi 87° - Lo 67°
10 AM
Sunny
Sunny
74°
11 AM
Sunny
Sunny
77°
12 PM
Sunny
Sunny
80°
1 PM
Sunny
Sunny
82°
2 PM
Sunny
Sunny
83°
3 PM
M Sunny
M Sunny
84°
Weather Maps
Daily Forecast -  °F | °C
thu fri sat sun mon tue wed thu fri sat
jul
31
P Cloudy
P Cloudy
87°
67°
aug
01
Sct T-Storms
Sct T-Storms
76°
65°
aug
02
Rain
Rain
78°
66°
aug
03
Sct T-Storms
Sct T-Storms
78°
65°
aug
04
AM Clouds
AM Clouds
85°
66°
aug
05
P Cloudy
P Cloudy
87°
66°
aug
06
M Sunny
M Sunny
86°
66°
aug
07
PM T-Storms
PM T-Storms
86°
67°
aug
08
Rain
Rain
77°
65°
aug
09
Showers
Showers
78°
65°
Details for Thursday, July 31
Sun and clouds mixed. High 87F. Winds SW at 5 to 10 mph.
Evening: Mostly cloudy skies. Low 67F. Winds S at 5 to 10 mph.
UV Index: 9 (Very High)
Ultraviolet Radiation Index
Relative Humidity: 49%
Relative Humidity
Precipitation: 0%
Probability of Precipitation
Snow: 0%
Snow
Cloud Coverage: 27%
Cloud Coverage
Sunrise: 6:09 AM
Sunset: 8:21 PM
 
Moonrise: 10:31 AM
Moonset: 10:35 PM
Moon Phase:  Waxing Crescent
Moonphase:
Waxing Crescent
Wind Direction:  SW
Direction: SW (226°)
Speed: 8Mph(12Km, 9Kts)
Details for Friday, August 01
Mixed clouds and sun with scattered thunderstorms. High 76F. Winds S at 5 to 10 mph. Chance of rain 40%.
Evening: Scattered thunderstorms. Low near 65F. Winds ENE at 5 to 10 mph. Chance of rain 50%.
UV Index: 4 (Moderate)
Ultraviolet Radiation Index
Relative Humidity: 81%
Relative Humidity
Precipitation: 40%
Probability of Precipitation
Snow: 0%
Snow
Cloud Coverage: 97%
Cloud Coverage
Sunrise: 6:10 AM
Sunset: 8:20 PM
 
Moonrise: 11:28 AM
Moonset: 11:06 PM
Moon Phase:  Waxing Crescent
Moonphase:
Waxing Crescent
Wind Direction:  S
Direction: S (169°)
Speed: 7Mph(11Km, 8Kts)
Details for Saturday, August 02
Mainly cloudy and rainy. Highs in the upper 70s and lows in the mid 60s.
UV Index: 6 (High)
Ultraviolet Radiation Index
Relative Humidity: 78%
Relative Humidity
Precipitation: 70%
Probability of Precipitation
Snow: 0%
Snow
Cloud Coverage: 88%
Cloud Coverage
Sunrise: 6:10 AM
Sunset: 8:18 PM
 
Moonrise: 12:26 PM
Moonset: 11:40 PM
Moon Phase:  Waxing Crescent
Moonphase:
Waxing Crescent
Wind Direction:  NE
Direction: NE (54°)
Speed: 8Mph(13Km, 9Kts)
Details for Sunday, August 03
A few thunderstorms possible. Highs in the upper 70s and lows in the mid 60s.
UV Index: 5 (Moderate)
Ultraviolet Radiation Index
Relative Humidity: 82%
Relative Humidity
Precipitation: 50%
Probability of Precipitation
Snow: 0%
Snow
Cloud Coverage: 77%
Cloud Coverage
Sunrise: 6:11 AM
Sunset: 8:17 PM
 
Moonrise: 1:26 PM
Moonset: 12:01 AM
Moon Phase:  First Quarter
Moonphase:
First Quarter
Wind Direction:  E
Direction: E (97°)
Speed: 5Mph(8Km, 6Kts)
Details for Monday, August 04
Morning clouds followed by afternoon sun. Highs in the mid 80s and lows in the mid 60s.
UV Index: 9 (Very High)
Ultraviolet Radiation Index
Relative Humidity: 73%
Relative Humidity
Precipitation: 20%
Probability of Precipitation
Snow: 0%
Snow
Cloud Coverage: 56%
Cloud Coverage
Sunrise: 6:12 AM
Sunset: 8:16 PM
 
Moonrise: 2:26 PM
Moonset: 12:17 AM
Moon Phase:  Waxing Gibbous
Moonphase:
Waxing Gibbous
Wind Direction:  WSW
Direction: WSW (257°)
Speed: 5Mph(8Km, 6Kts)
Details for Tuesday, August 05
Partly cloudy. Highs in the upper 80s and lows in the mid 60s.
UV Index: 9 (Very High)
Ultraviolet Radiation Index
Relative Humidity: 65%
Relative Humidity
Precipitation: 10%
Probability of Precipitation
Snow: 0%
Snow
Cloud Coverage: 36%
Cloud Coverage
Sunrise: 6:13 AM
Sunset: 8:15 PM
 
Moonrise: 3:28 PM
Moonset: 12:59 AM
Moon Phase:  Waxing Gibbous
Moonphase:
Waxing Gibbous
Wind Direction:  WNW
Direction: WNW (303°)
Speed: 4Mph(7Km, 5Kts)
Details for Wednesday, August 06
Mostly sunny. Highs in the mid 80s and lows in the mid 60s.
UV Index: 9 (Very High)
Ultraviolet Radiation Index
Relative Humidity: 63%
Relative Humidity
Precipitation: 0%
Probability of Precipitation
Snow: 0%
Snow
Cloud Coverage: 27%
Cloud Coverage
Sunrise: 6:14 AM
Sunset: 8:14 PM
 
Moonrise: 4:28 PM
Moonset: 1:48 AM
Moon Phase:  Waxing Gibbous
Moonphase:
Waxing Gibbous
Wind Direction:  NW
Direction: NW (306°)
Speed: 6Mph(9Km, 7Kts)
Details for Thursday, August 07
Showers and thunderstorms late. Highs in the mid 80s and lows in the upper 60s.
UV Index: 9 (Very High)
Ultraviolet Radiation Index
Relative Humidity: 73%
Relative Humidity
Precipitation: 60%
Probability of Precipitation
Snow: 0%
Snow
Cloud Coverage: 45%
Cloud Coverage
Sunrise: 6:15 AM
Sunset: 8:13 PM
 
Moonrise: 5:27 PM
Moonset: 2:44 AM
Moon Phase:  Waxing Gibbous
Moonphase:
Waxing Gibbous
Wind Direction:  SW
Direction: SW (229°)
Speed: 6Mph(10Km, 7Kts)
Details for Friday, August 08
Cloudy with rain. Highs in the upper 70s and lows in the mid 60s.
UV Index: 6 (High)
Ultraviolet Radiation Index
Relative Humidity: 79%
Relative Humidity
Precipitation: 60%
Probability of Precipitation
Snow: 0%
Snow
Cloud Coverage: 77%
Cloud Coverage
Sunrise: 6:16 AM
Sunset: 8:12 PM
 
Moonrise: 6:21 PM
Moonset: 3:47 AM
Moon Phase:  Waxing Gibbous
Moonphase:
Waxing Gibbous
Wind Direction:  NE
Direction: NE (39°)
Speed: 7Mph(12Km, 8Kts)
Details for Saturday, August 09
Showers possible. Highs in the upper 70s and lows in the mid 60s.
UV Index: 6 (High)
Ultraviolet Radiation Index
Relative Humidity: 77%
Relative Humidity
Precipitation: 50%
Probability of Precipitation
Snow: 0%
Snow
Cloud Coverage: 77%
Cloud Coverage
Sunrise: 6:17 AM
Sunset: 8:11 PM
 
Moonrise: 7:11 PM
Moonset: 4:56 AM
Moon Phase:  Waxing Gibbous
Moonphase:
Waxing Gibbous
Wind Direction:  NW
Direction: NW (325°)
Speed: 6Mph(10Km, 7Kts)
Daily Forecast Chart
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