Great Falls, Virginia
Current Conditions -  °F | °C
As of 9:52 PM on Monday 01 Sep 2014 (Local Time) from KIAD Reporting Station
Scattered Clouds Scattered Clouds  
Wind Chill: 78°   Ceiling: Unl
Heat Index: 81°   Visibility: 10mi
Dew Point: 73°   Wind: 3mph
Humidity: 84%   Direction: 160°SSE
Pressure: 29.97"   Gusts: NA
Location:  39°N, 77.29°W
Report Text: KIAD 020152Z 16003KT 10SM FEW075 SCT250 26/23 A2997 RMK AO2 SLP146 T02560228
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Tropical Storm Tracking
Hourly Forecast -  °F | °C
Hi 87° - Lo 71°
11 PM
Clear
Clear
76°
12 AM
Clear
Clear
75°
1 AM
Clear
Clear
75°
2 AM
Clear
Clear
74°
3 AM
M Clear
M Clear
74°
4 AM
M Clear
M Clear
74°
Weather Maps
Daily Forecast -  °F | °C
mon tue wed thu fri sat sun mon tue wed
sep
01
M Clear
M Clear
87°
71°
sep
02
P Cloudy
P Cloudy
93°
70°
sep
03
P Cloudy
P Cloudy
87°
66°
sep
04
M Sunny
M Sunny
90°
67°
sep
05
P Cloudy
P Cloudy
89°
71°
sep
06
PM T-Storms
PM T-Storms
91°
69°
sep
07
Rain
Rain
79°
57°
sep
08
Showers
Showers
75°
57°
sep
09
Showers
Showers
74°
61°
sep
10
AM Showers
AM Showers
80°
64°
Details for Monday, September 01 (Evening)
Evening: Mostly clear. Low 71F. Winds light and variable.
UV Index: 0 (Low)
Ultraviolet Radiation Index
Relative Humidity: 89%
Relative Humidity
Precipitation: 10%
Probability of Precipitation
Snow: 0%
Snow
Cloud Coverage: 12%
Cloud Coverage
Sunrise: 6:37 AM
Sunset: 7:39 PM
 
Moonrise: 1:17 PM
Moonset: 11:42 PM
Moon Phase:  Waxing Crescent
Moonphase:
Waxing Crescent
Wind Direction:  W
Direction: W (259°)
Speed: 4Mph(6Km, 4Kts)
Details for Tuesday, September 02
Sunshine and clouds mixed. A stray afternoon thunderstorm is possible. High 93F. Winds SW at 5 to 10 mph.
Evening: Partly cloudy skies. Low around 70F. Winds WNW at 5 to 10 mph.
UV Index: 8 (Very High)
Ultraviolet Radiation Index
Relative Humidity: 60%
Relative Humidity
Precipitation: 20%
Probability of Precipitation
Snow: 0%
Snow
Cloud Coverage: 31%
Cloud Coverage
Sunrise: 6:38 AM
Sunset: 7:38 PM
 
Moonrise: 2:16 PM
Moonset: 12:01 AM
Moon Phase:  First Quarter
Moonphase:
First Quarter
Wind Direction:  SW
Direction: SW (234°)
Speed: 9Mph(15Km, 11Kts)
Details for Wednesday, September 03
Mix of sun and clouds. Highs in the upper 80s and lows in the mid 60s.
UV Index: 8 (Very High)
Ultraviolet Radiation Index
Relative Humidity: 60%
Relative Humidity
Precipitation: 0%
Probability of Precipitation
Snow: 0%
Snow
Cloud Coverage: 28%
Cloud Coverage
Sunrise: 6:39 AM
Sunset: 7:36 PM
 
Moonrise: 3:14 PM
Moonset: 12:33 AM
Moon Phase:  Waxing Gibbous
Moonphase:
Waxing Gibbous
Wind Direction:  NNW
Direction: NNW (334°)
Speed: 8Mph(12Km, 9Kts)
Details for Thursday, September 04
Plenty of sun. Highs in the low 90s and lows in the upper 60s.
UV Index: 8 (Very High)
Ultraviolet Radiation Index
Relative Humidity: 60%
Relative Humidity
Precipitation: 20%
Probability of Precipitation
Snow: 0%
Snow
Cloud Coverage: 13%
Cloud Coverage
Sunrise: 6:40 AM
Sunset: 7:35 PM
 
Moonrise: 4:08 PM
Moonset: 1:31 AM
Moon Phase:  Waxing Gibbous
Moonphase:
Waxing Gibbous
Wind Direction:  SSE
Direction: SSE (148°)
Speed: 7Mph(12Km, 8Kts)
Details for Friday, September 05
Mix of sun and clouds. Highs in the upper 80s and lows in the low 70s.
UV Index: 8 (Very High)
Ultraviolet Radiation Index
Relative Humidity: 77%
Relative Humidity
Precipitation: 20%
Probability of Precipitation
Snow: 0%
Snow
Cloud Coverage: 38%
Cloud Coverage
Sunrise: 6:41 AM
Sunset: 7:33 PM
 
Moonrise: 4:58 PM
Moonset: 2:34 AM
Moon Phase:  Waxing Gibbous
Moonphase:
Waxing Gibbous
Wind Direction:  S
Direction: S (186°)
Speed: 7Mph(11Km, 8Kts)
Details for Saturday, September 06
Afternoon showers and thunderstorms. Highs in the low 90s and lows in the upper 60s.
UV Index: 8 (Very High)
Ultraviolet Radiation Index
Relative Humidity: 73%
Relative Humidity
Precipitation: 60%
Probability of Precipitation
Snow: 0%
Snow
Cloud Coverage: 25%
Cloud Coverage
Sunrise: 6:42 AM
Sunset: 7:32 PM
 
Moonrise: 5:45 PM
Moonset: 3:44 AM
Moon Phase:  Waxing Gibbous
Moonphase:
Waxing Gibbous
Wind Direction:  WSW
Direction: WSW (249°)
Speed: 6Mph(10Km, 7Kts)
Details for Sunday, September 07
Cloudy, periods of rain. Highs in the upper 70s and lows in the upper 50s.
UV Index: 6 (High)
Ultraviolet Radiation Index
Relative Humidity: 74%
Relative Humidity
Precipitation: 60%
Probability of Precipitation
Snow: 0%
Snow
Cloud Coverage: 69%
Cloud Coverage
Sunrise: 6:43 AM
Sunset: 7:30 PM
 
Moonrise: 6:27 PM
Moonset: 4:55 AM
Moon Phase:  Waxing Gibbous
Moonphase:
Waxing Gibbous
Wind Direction:  N
Direction: N (352°)
Speed: 9Mph(14Km, 10Kts)
Details for Monday, September 08
Showers. Highs in the mid 70s and lows in the upper 50s.
UV Index: 7 (High)
Ultraviolet Radiation Index
Relative Humidity: 61%
Relative Humidity
Precipitation: 40%
Probability of Precipitation
Snow: 0%
Snow
Cloud Coverage: 55%
Cloud Coverage
Sunrise: 6:44 AM
Sunset: 7:28 PM
 
Moonrise: 7:07 PM
Moonset: 6:07 AM
Moon Phase:  Waxing Gibbous
Moonphase:
Waxing Gibbous
Wind Direction:  NE
Direction: NE (38°)
Speed: 8Mph(12Km, 9Kts)
Details for Tuesday, September 09
Chance of showers. Highs in the mid 70s and lows in the low 60s.
UV Index: 3 (Moderate)
Ultraviolet Radiation Index
Relative Humidity: 72%
Relative Humidity
Precipitation: 50%
Probability of Precipitation
Snow: 0%
Snow
Cloud Coverage: 88%
Cloud Coverage
Sunrise: 6:45 AM
Sunset: 7:27 PM
 
Moonrise: 7:46 PM
Moonset: 7:20 AM
Moon Phase:  Full
Moonphase:
Full
Wind Direction:  ENE
Direction: ENE (72°)
Speed: 7Mph(12Km, 9Kts)
Details for Wednesday, September 10
Morning showers. Highs in the low 80s and lows in the mid 60s.
UV Index: 6 (High)
Ultraviolet Radiation Index
Relative Humidity: 75%
Relative Humidity
Precipitation: 40%
Probability of Precipitation
Snow: 0%
Snow
Cloud Coverage: 63%
Cloud Coverage
Sunrise: 6:46 AM
Sunset: 7:25 PM
 
Moonrise: 8:24 PM
Moonset: 8:31 AM
Moon Phase:  Waning Gibbous
Moonphase:
Waning Gibbous
Wind Direction:  SE
Direction: SE (138°)
Speed: 6Mph(10Km, 7Kts)
Daily Forecast Chart
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