Weather History for KIAD - September, 2014

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Month of September, 2014

  Max Avg Min Sum
Temperature  
Max Temperature 91 °F 77 °F 67 °F
Mean Temperature 81 °F 68 °F 56 °F
Min Temperature 71 °F 58 °F 42 °F
Degree Days  
Heating Degree Days (base 65) 9 2 0 45
Cooling Degree Days (base 65) 16 4 0 126
Growing Degree Days (base 50) 31 17 6 518
Dew Point  
Dew Point 74 °F 58 °F 39 °F
Precipitation  
Precipitation 0.58 in 0.03 in 0.00 in 0.93 in
Snowdepth 0.0 in 0.0 in 0.0 in -
Wind  
Wind 25 mph 5 mph 0 mph
Gust Wind 35 mph 20 mph 16 mph
Sea Level Pressure  
Sea Level Pressure 30.48 in 30.11 in 29.65 in

Monthly Weather History Graph

Monthly Weather History Graph

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Astronomy

Sep. 04, 2014 Rise Set
Actual Time 6:41 AM EDT 7:35 PM EDT
Civil Twilight 6:14 AM EDT 8:02 PM EDT
Nautical Twilight 5:41 AM EDT 8:34 PM EDT
Astronomical Twilight 5:08 AM EDT 9:08 PM EDT
Moon 4:09 PM EDT (9/4) 1:31 AM EDT (9/4)
Length of Visible Light 13h 48m
Length of Day
12h 54m
Waxing Gibbous, 74% of the Moon is Illuminated
Sep 4
Waxing Gibbous
Sep 8
Full
Sep 15
Last Quarter
Sep 24
New
Oct 1
First Quarter

Daily Weather History & Observations

2014 Temp. (°F) Dew Point (°F) Humidity (%) Sea Level Press. (in) Visibility (mi) Wind (mph) Precip. (in) Events
Sep high avg low high avg low high avg low high avg low high avg low high avg high sum  
1 89 80 71 73 72 70 100 78 55 30.04 29.99 29.94 10 10 10 21 3 29 0.01 Rain , Thunderstorm
2 90 81 71 73 71 66 100 76 52 29.99 29.93 29.84 10 10 5 17 5 29 0.12 Rain , Thunderstorm
3 85 77 69 72 68 65 100 78 55 30.13 30.04 29.92 10 10 6 9 2 10 0.00  
4 86 76 65 73 69 64 100 81 61 30.17 30.14 30.09 10 10 10 13 5 16 0.00  
5 89 79 68 73 71 69 100 78 56 30.17 30.11 30.02 10 8 3 12 4 15 0.00 Fog
6 91 81 71 74 70 66 100 76 52 30.01 29.96 29.86 10 10 6 21 6 28 0.01 Rain , Thunderstorm
7 78 72 65 68 55 48 90 63 36 30.18 30.10 29.99 10 10 10 18 10 23 0.00  
8 72 67 61 64 59 54 84 75 66 30.25 30.21 30.17 10 10 10 15 6 22 T Rain
9 74 69 64 64 62 60 87 80 73 30.21 30.16 30.10 10 10 10 9 7 13 0.00  
10 77 72 67 66 64 63 93 79 64 30.14 30.08 29.99 10 10 10 13 6 17 0.00  
11 86 77 67 70 67 60 93 75 57 30.00 29.92 29.87 10 10 10 20 9 24 0.00  
12 74 67 60 58 55 53 78 66 53 30.16 30.11 30.01 10 10 10 16 8 22 0.00  
13 69 62 55 61 56 53 97 80 63 30.24 30.15 30.12 10 8 1 18 5 23 0.07 Rain
14 68 57 45 51 48 44 100 74 48 30.34 30.27 30.22 10 10 10 13 4 16 0.00  
15 73 61 48 59 52 48 100 72 44 30.26 30.18 30.04 10 10 10 10 3 14 0.00  
16 76 64 52 61 54 49 100 72 43 30.05 30.02 30.00 10 9 4 22 6 31 0.00 Fog
17 74 61 48 52 50 48 93 69 44 30.08 30.02 29.96 10 10 10 9 3 12 0.00  
18 77 65 53 57 53 47 93 65 36 30.12 30.01 29.97 10 10 10 14 4 20 0.00  
19 73 63 52 59 53 48 93 71 49 30.29 30.23 30.11 10 10 10 15 7 22 0.00  
20 79 67 55 61 58 55 100 73 45 30.28 30.18 30.05 10 9 4 14 5 17 0.00 Fog
21 84 68 52 67 59 54 100 74 47 30.04 29.81 29.65 10 9 5 22 6 29 T Rain
22 72 63 54 50 45 41 72 53 34 30.25 30.01 29.79 10 10 9 25 11 35 0.00  
23 70 56 42 47 43 39 89 62 35 30.39 30.33 30.25 10 10 10 12 4 14 0.00  
24 68 58 47 59 53 46 93 80 67 30.48 30.43 30.37 10 10 7 17 7 22 0.06 Rain
25 67 62 57 63 59 57 100 89 78 30.37 30.29 30.25 10 6 1 16 9 21 0.58 Rain
26 76 64 52 63 55 51 100 72 43 30.32 30.25 30.19 10 7 0 16 5 20 0.00 Fog , Rain
27 80 66 51 57 54 51 100 70 39 30.27 30.22 30.18 10 10 8 10 4 17 0.00 Fog
28 80 65 49 60 56 51 100 71 42 30.21 30.15 30.05 10 9 2 10 2 13 0.00 Fog
29 70 64 57 63 61 58 100 87 73 30.05 29.98 29.94 10 10 9 8 2 10 T Rain
30 73 67 61 63 62 59 100 84 68 29.95 29.92 29.87 10 5 0 13 3 16 0.08 Fog , Rain