Weather History for Dulles Airport, VA

Change the Weather History Date:

Tuesday, May 1, 2012

  Actual Average Record
Temperature  
Mean Temperature 22 °C 15 °C  
Max Temperature 29 °C 22 °C 32 °C (2010)
Min Temperature 14 °C 8 °C 0 °C (1996)
Degree Days  
Heating Degree Days 0 7  
Month to date heating degree days 0 7  
Since 1 July heating degree days 3729 4579  
Cooling Degree Days 6 1  
Month to date cooling degree days 6 1  
Year to date cooling degree days 34 21  
Growing Degree Days 20 (Base 50)    
Moisture  
Dew Point 14 °C    
Average Humidity 67    
Maximum Humidity 93    
Minimum Humidity 40    
Precipitation  
Precipitation 2.29 mm 3.30 mm 3.61 mm (1981)
Month to date precipitation 0.09 0.13  
Year to date precipitation 7.52 12.40  
Snow  
Snow 0.00 cm 0.00 cm T cm (1963)
Month to date snowfall 0.0 0.0  
Since 1 July snowfall 3.7 22.0  
Snow Depth 0.00 cm    
Sea Level Pressure  
Sea Level Pressure 1016 hPa    
Wind  
Wind Speed 10 km/h (SSW)    
Max Wind Speed 24 km/h    
Max Gust Speed 32 km/h    
Visibility 15 kilometers    
Events Rain , Thunderstorm    
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

Daily Weather History Graph

Daily Weather History Graph

Search for Another Location

Airport:

Trip Planner

Search our weather history database for the weather conditions in past years. The results will help you decide how hot, cold, wet, or windy it might be!

Date:

Astronomy

May. 01, 2012 Rise Set
Actual Time 6:11 AM EDT 8:02 PM EDT
Civil Twilight 5:42 AM EDT 8:31 PM EDT
Nautical Twilight 5:07 AM EDT 9:06 PM EDT
Astronomical Twilight 4:30 AM EDT 9:44 PM EDT
Moon 3:06 PM EDT 3:04 AM EDT
Length of Visible Light 14h 49m
Length of Day
13h 51m
Waxing Gibbous, 73% of the Moon is Illuminated
May 1
Waxing Gibbous
May 5
Full
May 12
Last Quarter
May 20
New
May 28
First Quarter

Hourly Weather History & Observations

Time (EDT) Temp. Heat Index Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:24 AM 16.0 °C - 8.0 °C 59% 1019.5 hPa 16.1 km SSE 7.4 km/h / 2.1 m/s - N/A Thunderstorm Thunderstorm
12:52 AM 15.6 °C - 8.9 °C 64% 1018.9 hPa 16.1 km SSE 11.1 km/h / 3.1 m/s - N/A   Overcast
1:52 AM 14.4 °C - 8.9 °C 70% 1017.5 hPa 16.1 km SSE 14.8 km/h / 4.1 m/s - N/A   Mostly Cloudy
2:26 AM 15.0 °C - 9.0 °C 67% 1017.2 hPa 16.1 km SSE 11.1 km/h / 3.1 m/s - N/A   Overcast
2:52 AM 15.0 °C - 10.0 °C 72% 1016.8 hPa 16.1 km SSE 11.1 km/h / 3.1 m/s - N/A   Overcast
3:52 AM 15.0 °C - 10.6 °C 75% 1016.1 hPa 16.1 km SSE 13.0 km/h / 3.6 m/s - N/A   Overcast
4:52 AM 15.0 °C - 11.1 °C 78% 1017.0 hPa 16.1 km West 9.3 km/h / 2.6 m/s - N/A   Overcast
5:26 AM 14.0 °C - 12.0 °C 88% 1016.1 hPa 16.1 km SSE 7.4 km/h / 2.1 m/s - 0.3 mm Rain Light Rain
5:52 AM 13.9 °C - 12.2 °C 89% 1016.5 hPa 11.3 km South 9.3 km/h / 2.6 m/s - 0.3 mm Rain Light Rain
6:16 AM 14.0 °C - 12.0 °C 88% 1016.1 hPa 6.4 km South 13.0 km/h / 3.6 m/s - 0.8 mm Rain Rain
6:35 AM 14.0 °C - 13.0 °C 94% 1015.5 hPa 11.3 km South 13.0 km/h / 3.6 m/s - 1.8 mm Rain Light Rain
6:52 AM 13.9 °C - 13.3 °C 96% 1015.8 hPa 11.3 km SSW 16.7 km/h / 4.6 m/s - 2.0 mm Rain Light Rain
7:34 AM 14.0 °C - 14.0 °C 100% 1016.1 hPa 8.0 km SSW 14.8 km/h / 4.1 m/s - 0.0 mm   Mostly Cloudy
7:52 AM 15.0 °C - 14.0 °C 94% 1016.5 hPa 8.0 km SSW 16.7 km/h / 4.6 m/s - N/A   Mostly Cloudy
8:52 AM 17.8 °C - 16.1 °C 90% 1015.9 hPa 16.1 km SSW 18.5 km/h / 5.1 m/s - N/A   Mostly Cloudy
9:52 AM 20.0 °C - 17.0 °C 83% 1016.1 hPa 16.1 km SSW 18.5 km/h / 5.1 m/s - N/A   Overcast
10:52 AM 21.7 °C - 16.7 °C 73% 1016.5 hPa 16.1 km SW 18.5 km/h / 5.1 m/s - N/A   Overcast
11:52 AM 24.4 °C - 17.2 °C 64% 1016.3 hPa 16.1 km WSW 14.8 km/h / 4.1 m/s - N/A   Mostly Cloudy
12:52 PM 25.0 °C - 17.2 °C 62% 1016.0 hPa 16.1 km SW 11.1 km/h / 3.1 m/s - N/A   Mostly Cloudy
1:52 PM 26.7 °C 27.3 °C 16.1 °C 52% 1015.9 hPa 16.1 km NW 13.0 km/h / 3.6 m/s - N/A   Mostly Cloudy
2:52 PM 28.3 °C 28.4 °C 15.6 °C 46% 1015.5 hPa 16.1 km WNW 13.0 km/h / 3.6 m/s - N/A   Mostly Cloudy
3:52 PM 28.0 °C 27.8 °C 14.0 °C 42% 1015.5 hPa 16.1 km NW 16.7 km/h / 4.6 m/s - N/A   Overcast
4:52 PM 28.9 °C 28.5 °C 13.9 °C 40% 1015.0 hPa 16.1 km NNW 7.4 km/h / 2.1 m/s - N/A   Overcast
5:52 PM 27.8 °C 27.4 °C 12.8 °C 39% 1015.2 hPa 16.1 km WSW 7.4 km/h / 2.1 m/s - N/A   Mostly Cloudy
6:52 PM 27.2 °C 27.3 °C 14.4 °C 45% 1015.0 hPa 16.1 km SW 7.4 km/h / 2.1 m/s - N/A   Mostly Cloudy
7:52 PM 25.0 °C - 16.1 °C 58% 1014.9 hPa 16.1 km South 5.6 km/h / 1.5 m/s - N/A   Scattered Clouds
8:52 PM 21.1 °C - 16.1 °C 73% 1015.2 hPa 16.1 km Calm Calm - N/A   Partly Cloudy
9:52 PM 20.6 °C - 16.1 °C 75% 1015.8 hPa 16.1 km SE 5.6 km/h / 1.5 m/s - N/A   Scattered Clouds
10:52 PM 17.2 °C - 15.6 °C 90% 1015.7 hPa 16.1 km Calm Calm - N/A   Partly Cloudy
11:52 PM 17.2 °C - 15.6 °C 90% 1016.0 hPa 16.1 km Calm Calm - N/A   Scattered Clouds