Weather Report
Herndon, Pennsylvania
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Current Conditions -  °F | °C
As of 9:53 AM on Monday 20 May 2013 (Local Time) from KSEG Reporting Station
Haze Haze   Feels Like: 66°
Wind Chill: 66°   Ceiling: 800
Heat Index: 66°   Visibility: 5mi
Dew Point: 62°   Wind: 0mph
Humidity: 87%   Direction: NA NA
Pressure: 30.11"   Gusts: NA
Report Text: KSEG 201353Z AUTO 00000KT 5SM BR OVC008 19/17 A3011 RMK AO2 SLP193 T01890167 TSNO
11 AM
Cloudy
Cloudy 66°
12 PM
Cloudy
Cloudy 70°
1 PM
P Cloudy
P Cloudy 72°
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Interactive Weather Map
10 Day Forecast -  °F | °C
mon tue wed thu fri sat sun mon tue wed
may
20
AM Clouds
AM Clouds
81°
63°
may
21
Iso T-Storms
Iso T-Storms
87°
66°
may
22
Sct T-Storms
Sct T-Storms
85°
66°
may
23
Sct T-Storms
Sct T-Storms
77°
58°
may
24
P Cloudy
P Cloudy
70°
45°
may
25
P Cloudy
P Cloudy
69°
47°
may
26
P Cloudy
P Cloudy
72°
53°
may
27
P Cloudy
P Cloudy
71°
55°
may
28
P Cloudy
P Cloudy
74°
60°
may
29
Cloudy
Cloudy
79°
62°
Details for Monday, May 20
Cloudy early with peeks of sunshine expected late. A stray shower or thunderstorm is possible. High 81F. Winds S at 5 to 10 mph.
Evening: Partly cloudy. Chance of a shower or thunderstorm through the evening. Low 63F. Winds S at 5 to 10 mph.
UV Index: 7 (High)
Ultraviolet Radiation Index
Relative Humidity: 72%
Relative Humidity
Precipitation: 20%
Probability of Precipitation
Snow: 0%
Snow
Cloud Coverage: 64%
Cloud Coverage
Sunrise: 5:46 AM
Sunset: 8:23 PM
 
Moonrise: 3:26 PM
Moonset: 2:41 AM
Moon Phase:  Waxing Gibbous
Moonphase:
Waxing Gibbous
Wind Direction:  S
Direction: S (188°)
Speed: 7Mph(12Km, 6Kts)
Details for Tuesday, May 21
Scattered clouds with the possibility of an isolated thunderstorm developing during the afternoon. Very warm. High 87F. Winds SSW at 5 to 10 mph. Chance of rain 30%.
Evening: Mostly cloudy with a slight chance of showers and thunderstorms. Low 66F. Winds S at 5 to 10 mph. Chance of rain 30%.
UV Index: 8 (Very High)
Ultraviolet Radiation Index
Relative Humidity: 67%
Relative Humidity
Precipitation: 30%
Probability of Precipitation
Snow: 0%
Snow
Cloud Coverage: 40%
Cloud Coverage
Sunrise: 5:45 AM
Sunset: 8:24 PM
 
Moonrise: 4:33 PM
Moonset: 3:13 AM
Moon Phase:  Waxing Gibbous
Moonphase:
Waxing Gibbous
Wind Direction:  SSW
Direction: SSW (192°)
Speed: 10Mph(16Km, 9Kts)
Details for Wednesday, May 22
A few thunderstorms possible. Highs in the mid 80s and lows in the mid 60s.
UV Index: 7 (High)
Ultraviolet Radiation Index
Relative Humidity: 69%
Relative Humidity
Precipitation: 30%
Probability of Precipitation
Snow: 0%
Snow
Cloud Coverage: 74%
Cloud Coverage
Sunrise: 5:44 AM
Sunset: 8:25 PM
 
Moonrise: 5:43 PM
Moonset: 3:47 AM
Moon Phase:  Waxing Gibbous
Moonphase:
Waxing Gibbous
Wind Direction:  S
Direction: S (190°)
Speed: 8Mph(13Km, 7Kts)
Details for Thursday, May 23
Scattered thunderstorms possible. Highs in the upper 70s and lows in the upper 50s.
UV Index: 8 (Very High)
Ultraviolet Radiation Index
Relative Humidity: 68%
Relative Humidity
Precipitation: 60%
Probability of Precipitation
Snow: 0%
Snow
Cloud Coverage: 58%
Cloud Coverage
Sunrise: 5:43 AM
Sunset: 8:26 PM
 
Moonrise: 6:55 PM
Moonset: 4:27 AM
Moon Phase:  Waxing Gibbous
Moonphase:
Waxing Gibbous
Wind Direction:  WSW
Direction: WSW (239°)
Speed: 7Mph(12Km, 6Kts)
Details for Friday, May 24
Mix of sun and clouds. Highs in the low 70s and lows in the mid 40s.
UV Index: 8 (Very High)
Ultraviolet Radiation Index
Relative Humidity: 56%
Relative Humidity
Precipitation: 20%
Probability of Precipitation
Snow: 0%
Snow
Cloud Coverage: 36%
Cloud Coverage
Sunrise: 5:43 AM
Sunset: 8:26 PM
 
Moonrise: 8:06 PM
Moonset: 5:13 AM
Moon Phase:  Full
Moonphase:
Full
Wind Direction:  NNW
Direction: NNW (338°)
Speed: 10Mph(16Km, 9Kts)
Details for Saturday, May 25
Times of sun and clouds. Highs in the upper 60s and lows in the upper 40s.
UV Index: 8 (Very High)
Ultraviolet Radiation Index
Relative Humidity: 53%
Relative Humidity
Precipitation: 10%
Probability of Precipitation
Snow: 0%
Snow
Cloud Coverage: 24%
Cloud Coverage
Sunrise: 5:42 AM
Sunset: 8:27 PM
 
Moonrise: 9:13 PM
Moonset: 6:07 AM
Moon Phase:  Waning Gibbous
Moonphase:
Waning Gibbous
Wind Direction:  N
Direction: N (349°)
Speed: 6Mph(10Km, 5Kts)
Details for Sunday, May 26
Partly cloudy. Highs in the low 70s and lows in the low 50s.
UV Index: 8 (Very High)
Ultraviolet Radiation Index
Relative Humidity: 50%
Relative Humidity
Precipitation: 20%
Probability of Precipitation
Snow: 0%
Snow
Cloud Coverage: 47%
Cloud Coverage
Sunrise: 5:41 AM
Sunset: 8:28 PM
 
Moonrise: 10:14 PM
Moonset: 7:08 AM
Moon Phase:  Waning Gibbous
Moonphase:
Waning Gibbous
Wind Direction:  ESE
Direction: ESE (119°)
Speed: 4Mph(7Km, 3Kts)
Details for Monday, May 27
Times of sun and clouds. Highs in the low 70s and lows in the mid 50s.
UV Index: 8 (Very High)
Ultraviolet Radiation Index
Relative Humidity: 60%
Relative Humidity
Precipitation: 20%
Probability of Precipitation
Snow: 0%
Snow
Cloud Coverage: 37%
Cloud Coverage
Sunrise: 5:41 AM
Sunset: 8:29 PM
 
Moonrise: 11:06 PM
Moonset: 8:16 AM
Moon Phase:  Waning Gibbous
Moonphase:
Waning Gibbous
Wind Direction:  SE
Direction: SE (143°)
Speed: 5Mph(8Km, 4Kts)
Details for Tuesday, May 28
Times of sun and clouds. Highs in the mid 70s and lows in the low 60s.
UV Index: 9 (Very High)
Ultraviolet Radiation Index
Relative Humidity: 60%
Relative Humidity
Precipitation: 10%
Probability of Precipitation
Snow: 0%
Snow
Cloud Coverage: 29%
Cloud Coverage
Sunrise: 5:40 AM
Sunset: 8:30 PM
 
Moonrise: 11:51 PM
Moonset: 9:26 AM
Moon Phase:  Waning Gibbous
Moonphase:
Waning Gibbous
Wind Direction:  SSE
Direction: SSE (158°)
Speed: 7Mph(12Km, 6Kts)
Details for Wednesday, May 29
Cloudy. Highs in the upper 70s and lows in the low 60s.
UV Index: 5 (Moderate)
Ultraviolet Radiation Index
Relative Humidity: 64%
Relative Humidity
Precipitation: 20%
Probability of Precipitation
Snow: 0%
Snow
Cloud Coverage: 78%
Cloud Coverage
Sunrise: 5:39 AM
Sunset: 8:31 PM
 
Moonrise: 11:59 PM
Moonset: 10:37 AM
Moon Phase:  Waning Gibbous
Moonphase:
Waning Gibbous
Wind Direction:  S
Direction: S (175°)
Speed: 8Mph(13Km, 7Kts)
Chart.
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