Weather Report
Herndon, Virginia
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Current Conditions -  °F | °C
As of 9:52 AM on Thursday 23 May 2013 (Local Time) from KIAD Reporting Station
Broken Clouds Broken Clouds   Feels Like: 74°
Wind Chill: 74°   Ceiling: 10000
Heat Index: 74°   Visibility: 10mi
Dew Point: 66°   Wind: 14mph
Humidity: 76%   Direction: 200° (SSW)
Pressure: 29.89"   Gusts: NA
Report Text: KIAD 231352Z 20012KT 10SM SCT013 BKN100 BKN200 23/19 A2989 RMK AO2 SLP118 T02330189
11 AM
Iso T-Storms
Iso T-Storms 73°
12 PM
Iso T-Storms
Iso T-Storms 74°
1 PM
T-Storms
T-Storms 75°
Alerts
Interactive Weather Map
10 Day Forecast -  °F | °C
thu fri sat sun mon tue wed thu fri sat
may
23
T-Storms
T-Storms
76°
62°
may
24
Showers/Wind
Showers/Wind
62°
46°
may
25
P Cloudy
P Cloudy
69°
46°
may
26
P Cloudy
P Cloudy
72°
48°
may
27
P Cloudy
P Cloudy
75°
51°
may
28
P Cloudy
P Cloudy
78°
59°
may
29
P Cloudy
P Cloudy
83°
65°
may
30
Sct T-Storms
Sct T-Storms
87°
67°
may
31
P Cloudy
P Cloudy
88°
70°
jun
01
P Cloudy
P Cloudy
89°
71°
Details for Thursday, May 23
Isolated thunderstorms during the morning becoming more widespread this afternoon. A few storms may be severe. High 76F. Winds SSW at 10 to 15 mph. Chance of rain 80%.
Evening: Scattered thunderstorms early, mainly cloudy late with a few showers. Low 62F. SSW winds shifting to WNW at 10 to 15 mph. Chance of rain 40%.
UV Index: 6 (High)
Ultraviolet Radiation Index
Relative Humidity: 76%
Relative Humidity
Precipitation: 80%
Probability of Precipitation
Snow: 0%
Snow
Cloud Coverage: 84%
Cloud Coverage
Sunrise: 5:51 AM
Sunset: 8:23 PM
 
Moonrise: 6:53 PM
Moonset: 4:33 AM
Moon Phase:  Waxing Gibbous
Moonphase:
Waxing Gibbous
Wind Direction:  SSW
Direction: SSW (195°)
Speed: 12Mph(20Km, 10Kts)
Details for Friday, May 24
Cloudy and windy. A few showers in the afternoon. High 62F. Winds NW at 20 to 30 mph. Chance of rain 30%.
Evening: Partly cloudy skies with gusty winds. Slight chance of a rain shower. Low 46F. Winds NW at 15 to 25 mph.
UV Index: 7 (High)
Ultraviolet Radiation Index
Relative Humidity: 61%
Relative Humidity
Precipitation: 30%
Probability of Precipitation
Snow: 0%
Snow
Cloud Coverage: 71%
Cloud Coverage
Sunrise: 5:50 AM
Sunset: 8:23 PM
 
Moonrise: 8:03 PM
Moonset: 5:20 AM
Moon Phase:  Full
Moonphase:
Full
Wind Direction:  NW
Direction: NW (323°)
Speed: 21Mph(34Km, 18Kts)
Details for Saturday, May 25
Mix of sun and clouds. Highs in the upper 60s and lows in the mid 40s.
UV Index: 9 (Very High)
Ultraviolet Radiation Index
Relative Humidity: 40%
Relative Humidity
Precipitation: 10%
Probability of Precipitation
Snow: 0%
Snow
Cloud Coverage: 47%
Cloud Coverage
Sunrise: 5:50 AM
Sunset: 8:24 PM
 
Moonrise: 9:10 PM
Moonset: 6:14 AM
Moon Phase:  Waning Gibbous
Moonphase:
Waning Gibbous
Wind Direction:  NNW
Direction: NNW (344°)
Speed: 19Mph(31Km, 16Kts)
Details for Sunday, May 26
Mix of sun and clouds. Highs in the low 70s and lows in the upper 40s.
UV Index: 8 (Very High)
Ultraviolet Radiation Index
Relative Humidity: 48%
Relative Humidity
Precipitation: 10%
Probability of Precipitation
Snow: 0%
Snow
Cloud Coverage: 59%
Cloud Coverage
Sunrise: 5:49 AM
Sunset: 8:25 PM
 
Moonrise: 10:11 PM
Moonset: 7:16 AM
Moon Phase:  Waning Gibbous
Moonphase:
Waning Gibbous
Wind Direction:  NNW
Direction: NNW (335°)
Speed: 7Mph(12Km, 6Kts)
Details for Monday, May 27
Times of sun and clouds. Highs in the mid 70s and lows in the low 50s.
UV Index: 9 (Very High)
Ultraviolet Radiation Index
Relative Humidity: 58%
Relative Humidity
Precipitation: 10%
Probability of Precipitation
Snow: 0%
Snow
Cloud Coverage: 48%
Cloud Coverage
Sunrise: 5:48 AM
Sunset: 8:26 PM
 
Moonrise: 11:04 PM
Moonset: 8:23 AM
Moon Phase:  Waning Gibbous
Moonphase:
Waning Gibbous
Wind Direction:  ESE
Direction: ESE (116°)
Speed: 7Mph(12Km, 6Kts)
Details for Tuesday, May 28
Mix of sun and clouds. Highs in the upper 70s and lows in the upper 50s.
UV Index: 9 (Very High)
Ultraviolet Radiation Index
Relative Humidity: 60%
Relative Humidity
Precipitation: 10%
Probability of Precipitation
Snow: 0%
Snow
Cloud Coverage: 30%
Cloud Coverage
Sunrise: 5:48 AM
Sunset: 8:27 PM
 
Moonrise: 11:50 PM
Moonset: 9:33 AM
Moon Phase:  Waning Gibbous
Moonphase:
Waning Gibbous
Wind Direction:  SSE
Direction: SSE (153°)
Speed: 7Mph(12Km, 6Kts)
Details for Wednesday, May 29
Partly cloudy. Highs in the low 80s and lows in the mid 60s.
UV Index: 9 (Very High)
Ultraviolet Radiation Index
Relative Humidity: 63%
Relative Humidity
Precipitation: 20%
Probability of Precipitation
Snow: 0%
Snow
Cloud Coverage: 46%
Cloud Coverage
Sunrise: 5:47 AM
Sunset: 8:27 PM
 
Moonrise: 11:59 PM
Moonset: 10:43 AM
Moon Phase:  Waning Gibbous
Moonphase:
Waning Gibbous
Wind Direction:  S
Direction: S (187°)
Speed: 7Mph(12Km, 6Kts)
Details for Thursday, May 30
A few thunderstorms possible. Highs in the upper 80s and lows in the upper 60s.
UV Index: 8 (Very High)
Ultraviolet Radiation Index
Relative Humidity: 60%
Relative Humidity
Precipitation: 40%
Probability of Precipitation
Snow: 0%
Snow
Cloud Coverage: 54%
Cloud Coverage
Sunrise: 5:47 AM
Sunset: 8:28 PM
 
Moonrise: 12:30 AM
Moonset: 11:51 AM
Moon Phase:  Waning Gibbous
Moonphase:
Waning Gibbous
Wind Direction:  SW
Direction: SW (215°)
Speed: 7Mph(12Km, 6Kts)
Details for Friday, May 31
Times of sun and clouds. Highs in the upper 80s and lows in the low 70s.
UV Index: 7 (High)
Ultraviolet Radiation Index
Relative Humidity: 59%
Relative Humidity
Precipitation: 20%
Probability of Precipitation
Snow: 0%
Snow
Cloud Coverage: 68%
Cloud Coverage
Sunrise: 5:47 AM
Sunset: 8:29 PM
 
Moonrise: 1:05 AM
Moonset: 12:56 PM
Moon Phase:  Waning Gibbous
Moonphase:
Waning Gibbous
Wind Direction:  SW
Direction: SW (223°)
Speed: 9Mph(15Km, 8Kts)
Details for Saturday, June 01
Partly cloudy. Highs in the upper 80s and lows in the low 70s.
UV Index: 9 (Very High)
Ultraviolet Radiation Index
Relative Humidity: 56%
Relative Humidity
Precipitation: 20%
Probability of Precipitation
Snow: 0%
Snow
Cloud Coverage: 36%
Cloud Coverage
Sunrise: 5:46 AM
Sunset: 8:29 PM
 
Moonrise: 1:38 AM
Moonset: 2:00 PM
Moon Phase:  Last Quarter
Moonphase:
Last Quarter
Wind Direction:  SSW
Direction: SSW (210°)
Speed: 9Mph(15Km, 8Kts)
Chart.
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