Weather Report
Great Falls, Virginia
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Current Conditions -  °F | °C
As of 6:33 AM on Wednesday 22 May 2013 (Local Time) from KIAD Reporting Station
Haze Haze   Feels Like: 70°
Wind Chill: 70°   Ceiling: 500
Heat Index: 70°   Visibility: 2mi
Dew Point: 68°   Wind: 9mph
Humidity: 94%   Direction: 220° (SW)
Pressure: 29.9"   Gusts: NA
Report Text: KIAD 221033Z 22008KT 2SM BR BKN005 BKN090 21/20 A2990 RMK AO2 PRESRR
7 AM
P Cloudy
P Cloudy 70°
8 AM
P Cloudy
P Cloudy 71°
9 AM
P Cloudy
P Cloudy 73°
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Interactive Weather Map
10 Day Forecast -  °F | °C
wed thu fri sat sun mon tue wed thu fri
may
22
Iso T-Storms
Iso T-Storms
86°
68°
may
23
Sct T-Storms
Sct T-Storms
79°
60°
may
24
AM Showers
AM Showers
64°
46°
may
25
P Cloudy
P Cloudy
71°
48°
may
26
P Cloudy
P Cloudy
70°
49°
may
27
Few Showers
Few Showers
72°
52°
may
28
Iso T-Storms
Iso T-Storms
76°
58°
may
29
P Cloudy
P Cloudy
79°
64°
may
30
Cloudy
Cloudy
84°
67°
may
31
P Cloudy
P Cloudy
86°
68°
Details for Wednesday, May 22
Some sunshine with a thunderstorm or two possible this afternoon. Warm. High 86F. Winds SSW at 10 to 15 mph. Chance of rain 30%.
Evening: Partly cloudy with a slight chance of thunderstorms. Low 68F. Winds S at 5 to 10 mph. Chance of rain 30%.
UV Index: 9 (Very High)
Ultraviolet Radiation Index
Relative Humidity: 72%
Relative Humidity
Precipitation: 30%
Probability of Precipitation
Snow: 0%
Snow
Cloud Coverage: 49%
Cloud Coverage
Sunrise: 5:51 AM
Sunset: 8:21 PM
 
Moonrise: 5:42 PM
Moonset: 3:52 AM
Moon Phase:  Waxing Gibbous
Moonphase:
Waxing Gibbous
Wind Direction:  SSW
Direction: SSW (200°)
Speed: 11Mph(18Km, 9Kts)
Details for Thursday, May 23
Scattered showers and thunderstorms. High 79F. Winds SSW at 10 to 15 mph. Chance of rain 50%.
Evening: Variably cloudy with scattered thunderstorms. Low near 60F. Winds WSW at 5 to 10 mph. Chance of rain 60%.
UV Index: 7 (High)
Ultraviolet Radiation Index
Relative Humidity: 77%
Relative Humidity
Precipitation: 60%
Probability of Precipitation
Snow: 0%
Snow
Cloud Coverage: 75%
Cloud Coverage
Sunrise: 5:50 AM
Sunset: 8:22 PM
 
Moonrise: 6:52 PM
Moonset: 4:32 AM
Moon Phase:  Waxing Gibbous
Moonphase:
Waxing Gibbous
Wind Direction:  SSW
Direction: SSW (195°)
Speed: 11Mph(18Km, 9Kts)
Details for Friday, May 24
Morning showers. Highs in the mid 60s and lows in the mid 40s.
UV Index: 9 (Very High)
Ultraviolet Radiation Index
Relative Humidity: 64%
Relative Humidity
Precipitation: 30%
Probability of Precipitation
Snow: 0%
Snow
Cloud Coverage: 35%
Cloud Coverage
Sunrise: 5:50 AM
Sunset: 8:23 PM
 
Moonrise: 8:02 PM
Moonset: 5:19 AM
Moon Phase:  Full
Moonphase:
Full
Wind Direction:  NW
Direction: NW (324°)
Speed: 18Mph(29Km, 16Kts)
Details for Saturday, May 25
Times of sun and clouds. Highs in the low 70s and lows in the upper 40s.
UV Index: 9 (Very High)
Ultraviolet Radiation Index
Relative Humidity: 47%
Relative Humidity
Precipitation: 10%
Probability of Precipitation
Snow: 0%
Snow
Cloud Coverage: 32%
Cloud Coverage
Sunrise: 5:49 AM
Sunset: 8:23 PM
 
Moonrise: 9:09 PM
Moonset: 6:14 AM
Moon Phase:  Waning Gibbous
Moonphase:
Waning Gibbous
Wind Direction:  N
Direction: N (354°)
Speed: 8Mph(13Km, 7Kts)
Details for Sunday, May 26
Partly cloudy. Highs in the low 70s and lows in the upper 40s.
UV Index: 8 (Very High)
Ultraviolet Radiation Index
Relative Humidity: 54%
Relative Humidity
Precipitation: 10%
Probability of Precipitation
Snow: 0%
Snow
Cloud Coverage: 59%
Cloud Coverage
Sunrise: 5:49 AM
Sunset: 8:24 PM
 
Moonrise: 10:10 PM
Moonset: 7:15 AM
Moon Phase:  Waning Gibbous
Moonphase:
Waning Gibbous
Wind Direction:  NNE
Direction: NNE (31°)
Speed: 5Mph(8Km, 4Kts)
Details for Monday, May 27
Occasional showers possible. Highs in the low 70s and lows in the low 50s.
UV Index: 9 (Very High)
Ultraviolet Radiation Index
Relative Humidity: 62%
Relative Humidity
Precipitation: 30%
Probability of Precipitation
Snow: 0%
Snow
Cloud Coverage: 48%
Cloud Coverage
Sunrise: 5:48 AM
Sunset: 8:25 PM
 
Moonrise: 11:03 PM
Moonset: 8:23 AM
Moon Phase:  Waning Gibbous
Moonphase:
Waning Gibbous
Wind Direction:  E
Direction: E (92°)
Speed: 6Mph(10Km, 5Kts)
Details for Tuesday, May 28
Isolated thunderstorms. Highs in the mid 70s and lows in the upper 50s.
UV Index: 9 (Very High)
Ultraviolet Radiation Index
Relative Humidity: 65%
Relative Humidity
Precipitation: 30%
Probability of Precipitation
Snow: 0%
Snow
Cloud Coverage: 25%
Cloud Coverage
Sunrise: 5:48 AM
Sunset: 8:26 PM
 
Moonrise: 11:49 PM
Moonset: 9:32 AM
Moon Phase:  Waning Gibbous
Moonphase:
Waning Gibbous
Wind Direction:  SE
Direction: SE (126°)
Speed: 7Mph(12Km, 6Kts)
Details for Wednesday, May 29
Times of sun and clouds. Highs in the upper 70s and lows in the mid 60s.
UV Index: 8 (Very High)
Ultraviolet Radiation Index
Relative Humidity: 71%
Relative Humidity
Precipitation: 20%
Probability of Precipitation
Snow: 0%
Snow
Cloud Coverage: 58%
Cloud Coverage
Sunrise: 5:47 AM
Sunset: 8:26 PM
 
Moonrise: 11:59 PM
Moonset: 10:42 AM
Moon Phase:  Waning Gibbous
Moonphase:
Waning Gibbous
Wind Direction:  SSE
Direction: SSE (164°)
Speed: 7Mph(12Km, 6Kts)
Details for Thursday, May 30
Mostly Cloudy. Highs in the mid 80s and lows in the upper 60s.
UV Index: 6 (High)
Ultraviolet Radiation Index
Relative Humidity: 64%
Relative Humidity
Precipitation: 10%
Probability of Precipitation
Snow: 0%
Snow
Cloud Coverage: 79%
Cloud Coverage
Sunrise: 5:47 AM
Sunset: 8:27 PM
 
Moonrise: 12:29 AM
Moonset: 11:50 AM
Moon Phase:  Waning Gibbous
Moonphase:
Waning Gibbous
Wind Direction:  SSW
Direction: SSW (199°)
Speed: 8Mph(13Km, 7Kts)
Details for Friday, May 31
Mix of sun and clouds. Highs in the mid 80s and lows in the upper 60s.
UV Index: 9 (Very High)
Ultraviolet Radiation Index
Relative Humidity: 61%
Relative Humidity
Precipitation: 10%
Probability of Precipitation
Snow: 0%
Snow
Cloud Coverage: 12%
Cloud Coverage
Sunrise: 5:46 AM
Sunset: 8:28 PM
 
Moonrise: 1:04 AM
Moonset: 12:56 PM
Moon Phase:  Waning Gibbous
Moonphase:
Waning Gibbous
Wind Direction:  SW
Direction: SW (220°)
Speed: 8Mph(13Km, 7Kts)
Chart.
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