Weather History for Dulles Airport, VA

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Friday, April 19, 2013

  Actual Average Record
Temperature  
Mean Temperature 65 °F 56 °F  
Max Temperature 78 °F 68 °F 91 °F (2002)
Min Temperature 51 °F 43 °F 27 °F (1990)
Degree Days  
Heating Degree Days 0 10  
Month to date heating degree days 163 243  
Since 1 July heating degree days 4289 4480  
Cooling Degree Days 0 1  
Month to date cooling degree days 30 7  
Year to date cooling degree days 30 10  
Growing Degree Days 16 (Base 50)    
Moisture  
Dew Point 59 °F    
Average Humidity 75    
Maximum Humidity 93    
Minimum Humidity 56    
Precipitation  
Precipitation 1.20 in 0.11 in 1.20 in (2013)
Month to date precipitation 2.17 2.20  
Year to date precipitation 10.66 11.00  
Snow  
Snow 0.00 in 0.00 in 0.00 in (2002)
Month to date snowfall 0.0 0.3  
Since 1 July snowfall 12.7 22.0  
Snow Depth 0.00 in    
Sea Level Pressure  
Sea Level Pressure 29.78 in    
Wind  
Wind Speed 12 mph (South)    
Max Wind Speed 25 mph    
Max Gust Speed 35 mph    
Visibility 8 miles    
Events Rain , Thunderstorm    
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Daily Weather History Graph

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Date:

Astronomy

Apr. 19, 2013 Rise Set
Actual Time 6:27 AM EDT 7:51 PM EDT
Civil Twilight 5:59 AM EDT 8:18 PM EDT
Nautical Twilight 5:26 AM EDT 8:52 PM EDT
Astronomical Twilight 4:50 AM EDT 9:27 PM EDT
Moon 1:36 PM EDT (4/19) 2:38 AM EDT (4/19)
Length of Visible Light 14h 19m
Length of Day
13h 23m
First Quarter, 61% of the Moon is Illuminated
Apr 19
First Quarter
Apr 25
Full
May 2
Last Quarter
May 9
New
May 18
First Quarter

Hourly Weather History & Observations

Time (EDT) Temp. Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:52 AM 64.9 °F 57.9 °F 78% 29.97 in 10.0 mi SSE 10.4 mph 17.3 mph N/A   Partly Cloudy
1:52 AM 64.9 °F 57.9 °F 78% 29.95 in 10.0 mi South 11.5 mph 18.4 mph N/A   Partly Cloudy
2:52 AM 64.9 °F 57.9 °F 78% 29.92 in 10.0 mi South 9.2 mph - N/A   Mostly Cloudy
3:52 AM 64.0 °F 57.0 °F 78% 29.91 in 10.0 mi SSE 9.2 mph 19.6 mph N/A   Mostly Cloudy
4:06 AM 64.4 °F 57.2 °F 77% 29.90 in 10.0 mi SSE 8.1 mph - N/A   Mostly Cloudy
4:25 AM 64.4 °F 57.2 °F 77% 29.89 in 10.0 mi South 9.2 mph - N/A   Scattered Clouds
4:37 AM 64.4 °F 57.2 °F 77% 29.90 in 10.0 mi SSE 8.1 mph - N/A   Mostly Cloudy
4:52 AM 64.0 °F 57.9 °F 80% 29.89 in 10.0 mi South 6.9 mph - N/A   Overcast
5:52 AM 64.9 °F 59.0 °F 81% 29.88 in 10.0 mi South 8.1 mph - N/A   Overcast
6:07 AM 64.4 °F 59.0 °F 83% 29.88 in 10.0 mi SSE 8.1 mph - N/A   Overcast
6:35 AM 64.4 °F 59.0 °F 83% 29.88 in 10.0 mi SSE 10.4 mph - N/A   Overcast
6:52 AM 64.9 °F 59.0 °F 81% 29.88 in 10.0 mi SSE 10.4 mph 17.3 mph N/A   Overcast
7:52 AM 64.9 °F 60.1 °F 84% 29.88 in 10.0 mi SSE 11.5 mph - N/A   Overcast
8:52 AM 66.9 °F 61.0 °F 81% 29.86 in 10.0 mi SSE 8.1 mph 18.4 mph N/A   Overcast
9:52 AM 66.9 °F 61.0 °F 81% 29.83 in 10.0 mi SSE 9.2 mph 18.4 mph N/A   Overcast
10:52 AM 68.0 °F 62.1 °F 81% 29.82 in 10.0 mi SSE 11.5 mph - N/A   Overcast
11:18 AM 69.8 °F 62.6 °F 78% 29.81 in 10.0 mi South 10.4 mph 17.3 mph N/A   Overcast
11:52 AM 72.0 °F 61.0 °F 68% 29.78 in 10.0 mi South 17.3 mph 31.1 mph N/A   Overcast
12:52 PM 73.0 °F 62.1 °F 68% 29.76 in 10.0 mi South 15.0 mph 23.0 mph N/A   Overcast
1:52 PM 75.0 °F 62.1 °F 64% 29.71 in 10.0 mi South 19.6 mph 28.8 mph N/A   Mostly Cloudy
2:52 PM 75.9 °F 61.0 °F 60% 29.65 in 10.0 mi South 18.4 mph 26.5 mph N/A   Overcast
3:52 PM 77.0 °F 61.0 °F 58% 29.64 in 10.0 mi South 13.8 mph 28.8 mph N/A   Overcast
4:52 PM 77.0 °F 61.0 °F 58% 29.61 in 10.0 mi South 19.6 mph 27.6 mph N/A   Overcast
5:52 PM 78.1 °F 62.1 °F 58% 29.60 in 10.0 mi South 17.3 mph 25.3 mph N/A   Overcast
6:52 PM 70.0 °F 66.0 °F 87% 29.62 in 5.0 mi SSW 5.8 mph - 0.12 in Rain , Thunderstorm Light Thunderstorms and Rain
7:01 PM 69.8 °F 66.2 °F 88% 29.63 in 1.5 mi WSW 8.1 mph - 0.05 in Rain , Thunderstorm Heavy Thunderstorms and Rain
7:13 PM 69.8 °F 66.2 °F 88% 29.64 in 1.5 mi SW 13.8 mph 24.2 mph 0.16 in Rain , Thunderstorm Heavy Thunderstorms and Rain
7:44 PM 66.2 °F 64.4 °F 94% 29.65 in 7.0 mi SSW 13.8 mph - 0.21 in Rain Light Rain
7:52 PM 66.9 °F 64.0 °F 90% 29.65 in 7.0 mi SSW 15.0 mph - 0.22 in Rain Light Rain
8:23 PM 64.4 °F 60.8 °F 88% 29.67 in 10.0 mi NW 18.4 mph 23.0 mph 0.01 in Rain Light Rain
8:34 PM 60.8 °F 57.2 °F 88% 29.69 in 6.0 mi North 15.0 mph - 0.03 in Rain Rain
8:52 PM 57.9 °F 55.0 °F 90% 29.72 in 3.0 mi NW 9.2 mph - 0.13 in Rain Heavy Rain
9:20 PM 57.2 °F 55.4 °F 94% 29.73 in 2.0 mi NNW 5.8 mph - 0.22 in Rain Heavy Rain
9:27 PM 57.2 °F 53.6 °F 88% 29.75 in 3.0 mi NNW 12.7 mph 16.1 mph 0.26 in Rain Rain
9:43 PM 55.4 °F 53.6 °F 94% 29.75 in 2.0 mi NNW 13.8 mph - 0.48 in Rain Heavy Rain
9:52 PM 55.9 °F 52.0 °F 87% 29.75 in 2.5 mi NNW 10.4 mph 19.6 mph 0.59 in Rain Rain
9:57 PM 55.4 °F 50.0 °F 82% 29.76 in 4.0 mi NNW 13.8 mph - 0.02 in Rain Rain
10:52 PM 53.1 °F 46.0 °F 77% 29.77 in 10.0 mi North 10.4 mph - 0.12 in Rain Light Rain
11:52 PM 53.1 °F 43.0 °F 69% 29.80 in 10.0 mi NNW 11.5 mph - 0.02 in   Overcast