History for Dulles Airport, VA

Thursday, July 12, 2012 — View Current Conditions

Thursday, July 12, 2012

	Actual	Average	Record
Temperature
Mean Temperature	75 °F	77 °F
Max Temperature	87 °F	88 °F	97 °F (1986)
Min Temperature	63 °F	66 °F	47 °F (2002)
Degree Days
Heating Degree Days	0	0
Month to date heating degree days	0	0
Since 1 June heating degree days	9	15
Since 1 July heating degree days	0	0
Cooling Degree Days	10	12
Month to date cooling degree days	210	139
Year to date cooling degree days	607	468
Since 1 June cooling degree days	433	376
Growing Degree Days	25 (Base 50)
Moisture
Dew Point	60 °F
Average Humidity	63
Maximum Humidity	93
Minimum Humidity	32
Precipitation
Precipitation	0.00 in	0.11 in	2.61 in (1990)
Month to date precipitation	0.47	1.42
Year to date precipitation	15.07	22.22
Snow
Snow	0.00 in	0.00 in	- ()
Month to date snowfall	0.0	0.0
Since 1 July snowfall	0.0	0.0
Snow Depth	0.00 in
Sea Level Pressure
Sea Level Pressure	30.18 in
Wind
Wind Speed	4 mph (ESE)
Max Wind Speed	13 mph
Max Gust Speed	17 mph
Visibility	10 miles
Events

T = Trace of Precipitation, MM = Missing Value

Source: NWS Daily Summary

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Astronomy

May. 20, 2013	Rise	Set
Actual Time	5:54 AM EDT	8:35 PM EDT
Civil Twilight	5:23 AM EDT	9:07 PM EDT
Nautical Twilight	4:44 AM EDT	9:46 PM EDT
Astronomical Twilight	4:00 AM EDT	10:30 PM EDT
Moon	12:56 AM EDT (7/12)	3:07 PM EDT (7/12)
Length Of Visible Light	15h 43m
Length of Day	14h 41m

Waning Crescent, 35% of the Moon is Illuminated
Jul 12 Waning Crescent	Jul 19 New	Jul 26 First Quarter	Aug 1 Full	Aug 9 Last Quarter

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Hourly Observations

Time (EDT)	Temp.	Heat Index	Dew Point	Humidity	Pressure	Visibility	Wind Dir	Wind Speed	Gust Speed	Precip	Conditions
12:52 AM	73.0 °F	-	64.0 °F	73%	30.17 in	10.0 mi	ESE	4.6 mph	-	N/A	Mostly Cloudy
1:52 AM	73.0 °F	-	63.0 °F	71%	30.16 in	10.0 mi	Calm	Calm	-	N/A	Mostly Cloudy
2:52 AM	68.0 °F	-	62.1 °F	81%	30.16 in	10.0 mi	Calm	Calm	-	N/A	Mostly Cloudy
3:52 AM	64.9 °F	-	62.1 °F	90%	30.17 in	10.0 mi	Calm	Calm	-	N/A	Clear
4:52 AM	66.9 °F	-	63.0 °F	87%	30.17 in	10.0 mi	Calm	Calm	-	N/A	Partly Cloudy
5:52 AM	64.0 °F	-	62.1 °F	93%	30.17 in	10.0 mi	Calm	Calm	-	N/A	Mostly Cloudy
6:52 AM	68.0 °F	-	64.0 °F	87%	30.19 in	10.0 mi	WNW	3.5 mph	-	N/A	Mostly Cloudy
7:52 AM	73.9 °F	-	64.0 °F	71%	30.19 in	10.0 mi	Calm	Calm	-	N/A	Partly Cloudy
8:52 AM	75.9 °F	-	63.0 °F	64%	30.19 in	10.0 mi	East	3.5 mph	-	N/A	Partly Cloudy
9:52 AM	79.0 °F	-	64.0 °F	60%	30.19 in	10.0 mi	Calm	Calm	-	N/A	Mostly Cloudy
10:52 AM	81.0 °F	81.1 °F	57.9 °F	45%	30.19 in	10.0 mi	Variable	5.8 mph	-	N/A	Mostly Cloudy
11:52 AM	82.0 °F	82.0 °F	57.9 °F	44%	30.20 in	10.0 mi	ENE	6.9 mph	-	N/A	Mostly Cloudy
12:52 PM	84.9 °F	83.7 °F	55.9 °F	37%	30.20 in	10.0 mi	Calm	Calm	-	N/A	Mostly Cloudy
1:52 PM	86.0 °F	84.9 °F	57.0 °F	37%	30.19 in	10.0 mi	East	8.1 mph	-	N/A	Mostly Cloudy
2:52 PM	86.0 °F	84.7 °F	55.9 °F	36%	30.17 in	10.0 mi	ESE	9.2 mph	-	N/A	Mostly Cloudy
3:52 PM	86.0 °F	84.2 °F	54.0 °F	33%	30.17 in	10.0 mi	SE	11.5 mph	17.3 mph	N/A	Mostly Cloudy
4:52 PM	84.9 °F	83.6 °F	55.0 °F	36%	30.17 in	10.0 mi	East	11.5 mph	-	N/A	Mostly Cloudy
5:52 PM	84.9 °F	83.6 °F	55.0 °F	36%	30.16 in	10.0 mi	East	5.8 mph	-	N/A	Mostly Cloudy
6:52 PM	84.0 °F	83.0 °F	55.9 °F	38%	30.16 in	10.0 mi	East	10.4 mph	-	N/A	Mostly Cloudy
7:52 PM	82.0 °F	81.7 °F	57.0 °F	42%	30.17 in	10.0 mi	SE	6.9 mph	-	N/A	Mostly Cloudy
8:52 PM	79.0 °F	-	59.0 °F	50%	30.18 in	10.0 mi	SSE	3.5 mph	-	N/A	Mostly Cloudy
9:52 PM	78.1 °F	-	57.0 °F	48%	30.18 in	10.0 mi	South	4.6 mph	-	N/A	Mostly Cloudy
10:52 PM	75.9 °F	-	57.0 °F	52%	30.19 in	10.0 mi	SSE	4.6 mph	-	N/A	Mostly Cloudy
11:52 PM	73.4 °F	-	60.8 °F	65%	30.20 in	10.0 mi	South	3.5 mph	-	N/A	Mostly Cloudy
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