Weather History for Dulles Airport, VA

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Month of July, 2014

  Max Avg Min Sum
Temperature  
Max Temperature 95 °F 85 °F 74 °F
Mean Temperature 83 °F 74 °F 63 °F
Min Temperature 72 °F 64 °F 48 °F
Degree Days  
Heating Degree Days (base 65) 2 0 0 3
Cooling Degree Days (base 65) 18 10 0 296
Growing Degree Days (base 50) 33 24 14 749
Dew Point  
Dew Point 75 °F 62 °F 42 °F
Precipitation  
Precipitation 0.42 in 0.08 in 0.00 in 2.09 in
Snowdepth 0.0 in 0.0 in 0.0 in -
Wind  
Wind 41 mph 6 mph 0 mph
Gust Wind 54 mph 22 mph 16 mph
Sea Level Pressure  
Sea Level Pressure 30.28 in 29.99 in 29.59 in

Monthly Weather History Graph

Monthly Weather History Graph

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Date:

Astronomy

Jul. 15, 2014 Rise Set
Actual Time 5:56 AM EDT 8:34 PM EDT
Civil Twilight 5:25 AM EDT 9:05 PM EDT
Nautical Twilight 4:46 AM EDT 9:44 PM EDT
Astronomical Twilight 4:02 AM EDT 10:27 PM EDT
Moon 10:43 PM EDT (7/15) 9:46 AM EDT (7/15)
Length of Visible Light 15h 40m
Length of Day
14h 37m
Waning Gibbous, 85% of the Moon is Illuminated
Jul 15
Waning Gibbous
Jul 18
Last Quarter
Jul 26
New
Aug 3
First Quarter
Aug 10
Full

Weather History Calendar

Precipitation Actual month total 2.09 Normal Month Total: 3.67
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
 
Partly Cloudy
Actual:
91 | 72 0.00
Average:
87 | 65 0.13
Thunderstorm
Actual:
95 | 71 0.31
Average:
88 | 65 0.12
Thunderstorm
Actual:
88 | 69 0.10
Average:
88 | 65 0.12
Rain
Actual:
79 | 60 0.17
Average:
88 | 65 0.12
Scattered Clouds
Actual:
80 | 54 0.00
Average:
88 | 65 0.12
Partly Cloudy
Actual:
85 | 57 0.00
Average:
88 | 65 0.12
Partly Cloudy
Actual:
89 | 69 0.00
Average:
88 | 65 0.11
Thunderstorm
Actual:
92 | 67 0.40
Average:
88 | 65 0.12
Thunderstorm
Actual:
87 | 67 T
Average:
88 | 66 0.12
Thunderstorm
Actual:
86 | 66 0.42
Average:
88 | 66 0.11
Scattered Clouds
Actual:
85 | 63 0.00
Average:
88 | 66 0.12
Partly Cloudy
Actual:
87 | 66 0.00
Average:
88 | 66 0.11
Thunderstorm
Actual:
89 | 72 0.02
Average:
88 | 66 0.12
Thunderstorm
Actual:
90 | 71 0.19
Average:
88 | 66 0.12
Thunderstorm
Actual:
87 | 68 0.35
Average:
88 | 66 0.12
Partly Cloudy
Actual:
79 | 62 0.00
Average:
88 | 66 0.12
Partly Cloudy
Actual:
80 | 55 0.00
Average:
88 | 66 0.11
Partly Cloudy
Actual:
83 | 58 0.00
Average:
88 | 66 0.12
Rain
Actual:
80 | 66 T
Average:
88 | 66 0.11
Mostly Cloudy
Actual:
80 | 65 T
Average:
88 | 66 0.11
Rain
Actual:
82 | 69 T
Average:
88 | 66 0.11
Partly Cloudy
Actual:
84 | 70 0.00
Average:
88 | 66 0.12
Thunderstorm
Actual:
93 | 71 T
Average:
88 | 66 0.12
Rain
Actual:
78 | 61 0.06
Average:
88 | 66 0.12
Scattered Clouds
Actual:
82 | 56 0.00
Average:
88 | 66 0.12
Partly Cloudy
Actual:
87 | 66 T
Average:
88 | 66 0.12
Rain
Actual:
84 | 68 0.07
Average:
88 | 66 0.12
Partly Cloudy
Actual:
81 | 65 0.00
Average:
88 | 66 0.12
Scattered Clouds
Actual:
74 | 52 0.00
Average:
88 | 66 0.12
Scattered Clouds
Actual:
79 | 48 0.00
Average:
88 | 66 0.13
Partly Cloudy
Actual:
85 | 55 0.00
Average:
88 | 66 0.12
 

Calendar Legend

Sunny
Clear
Mostly Cloudy
Partly Sunny
Partly Cloudy
Mostly Sunny
Cloudy Rain Snow
Hail
Flurries
Thunderstorms Hazy
Fog
Sleet '?' denotes
'chance of'
Unknown

Daily Weather History & Observations

2014 Temp. (°F) Dew Point (°F) Humidity (%) Sea Level Press. (in) Visibility (mi) Wind (mph) Precip. (in) Events
Jul high avg low high avg low high avg low high avg low high avg low high avg high sum  
1 91 82 72 72 69 66 84 68 52 29.96 29.88 29.83 10 10 10 16 9 20 0.00  
2 95 83 71 74 71 68 88 67 46 29.94 29.88 29.84 10 9 2 25 7 31 0.31 Rain , Thunderstorm
3 88 79 69 75 70 68 100 80 59 29.99 29.94 29.91 10 9 2 16 3 21 0.10 Rain , Thunderstorm
4 79 70 60 70 56 46 93 63 33 30.19 30.05 29.98 10 9 4 28 14 36 0.17 Rain
5 80 67 54 54 48 42 77 52 26 30.28 30.22 30.17 10 10 10 12 5 18 0.00  
6 85 71 57 60 56 53 86 60 34 30.17 30.06 29.95 10 10 10 17 8 23 0.00  
7 89 79 69 64 62 61 73 58 43 29.95 29.89 29.81 10 10 10 20 11 26 0.00  
8 92 80 67 68 65 61 97 69 41 29.88 29.82 29.73 10 9 3 41 11 54 0.40 Rain , Thunderstorm
9 87 77 67 72 68 65 100 76 51 29.97 29.90 29.83 10 10 9 15 5 20 T Rain , Thunderstorm
10 86 76 66 70 66 61 100 72 44 30.13 30.05 29.98 10 8 0 22 3 31 0.42 Fog , Rain , Thunderstorm
11 85 74 63 67 64 61 93 69 44 30.21 30.17 30.13 10 10 8 10 4 13 0.00  
12 87 77 66 70 68 66 100 76 51 30.22 30.17 30.10 10 9 5 16 7 21 0.00  
13 89 81 72 71 69 64 93 74 55 30.10 30.00 29.90 10 10 8 28 9 33 0.02 Rain , Thunderstorm
14 90 81 71 75 71 68 93 76 59 29.94 29.88 29.82 10 9 2 24 3 30 0.19 Rain , Thunderstorm
15 87 78 68 74 69 50 100 80 60 29.92 29.79 29.73 10 8 2 18 3 23 0.35 Rain , Thunderstorm
16 79 71 62 65 56 49 93 66 38 29.96 29.87 29.79 10 10 9 16 7 28 0.00  
17 80 68 55 58 53 46 93 65 37 30.14 30.05 29.95 10 10 9 15 5 18 0.00  
18 83 71 58 60 55 51 90 65 39 30.25 30.20 30.15 10 10 7 8 3 26 0.00  
19 80 73 66 62 58 54 78 60 42 30.21 30.17 30.13 10 10 10 13 3 17 T Rain
20 80 73 65 68 63 60 93 72 51 30.14 30.11 30.07 10 10 10 8 3 26 T  
21 82 76 69 68 66 64 90 76 62 30.20 30.16 30.12 10 10 6 13 6 16 T Rain
22 84 77 70 70 69 68 93 77 61 30.20 30.14 30.07 10 10 7 13 6 16 0.00  
23 93 82 71 72 70 68 93 71 49 30.06 29.93 29.81 10 10 10 24 7 30 T Rain , Thunderstorm
24 78 70 61 69 62 56 93 72 50 29.96 29.91 29.86 10 10 5 14 7 17 0.06 Rain
25 82 69 56 59 54 48 97 66 34 30.09 30.03 29.99 10 10 10 13 6 20 0.00  
26 87 77 66 69 61 52 87 59 30 30.01 29.96 29.88 10 10 10 13 6 22 T  
27 84 76 68 71 69 66 90 76 61 29.88 29.78 29.64 10 10 9 17 9 22 0.07 Rain
28 81 73 65 68 60 54 100 71 42 29.84 29.69 29.59 10 10 10 26 12 32 0.00  
29 74 63 52 56 48 42 83 58 33 30.04 29.94 29.84 10 10 10 20 10 25 0.00  
30 79 64 48 55 50 46 93 66 38 30.09 30.06 30.03 10 10 7 14 4 17 0.00  
31 85 70 55 64 58 54 93 64 34 30.13 30.09 30.06 10 10 10 16 5 18 0.00