Weather History for Washington, DC

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Monday, May 12, 2008

  Actual Average Record
Temperature  
Mean Temperature 50 °F 65 °F  
Max Temperature 52 °F 74 °F 93 °F (1914)
Min Temperature 48 °F 55 °F 37 °F (1913)
Degree Days  
Heating Degree Days 15 3  
Month to date heating degree days 39 45  
Since 1 July heating degree days 3435 3991  
Cooling Degree Days 0 3  
Month to date cooling degree days 21 23  
Year to date cooling degree days 50 49  
Moisture  
Dew Point 46 °F    
Average Humidity 85    
Maximum Humidity 93    
Minimum Humidity 77    
Precipitation  
Precipitation 1.32 in 0.13 in 2.11 in (1932)
Month to date precipitation 7.75 1.47  
Year to date precipitation 21.01 13.44  
Snow  
Snow 0.00 in 0.00 in - ()
Month to date snowfall 0.0 0.0  
Since 1 July snowfall 4.9 15.4  
Snow Depth 0.00 in    
Sea Level Pressure  
Sea Level Pressure 29.58 in    
Wind  
Wind Speed 20 mph (North)    
Max Wind Speed 39 mph    
Max Gust Speed 49 mph    
Visibility 6 miles    
Events Rain    
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Date:

Astronomy

May. 12, 2008 Rise Set
Actual Time 5:58 AM EDT 8:11 PM EDT
Civil Twilight 5:28 AM EDT 8:41 PM EDT
Nautical Twilight 4:51 AM EDT 9:17 PM EDT
Astronomical Twilight 4:11 AM EDT 9:58 PM EDT
Moon 1:12 PM EDT (5/12) 2:13 AM EDT (5/12)
Length of Visible Light 15h 12m
Length of Day
14h 13m
First Quarter, 55% of the Moon is Illuminated
May 12
First Quarter
May 19
Full
May 27
Last Quarter
Jun 3
New
Jun 10
First Quarter

Hourly Weather History & Observations

Time (EDT) Temp. Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:07 AM 53.6 °F 48.2 °F 82% 29.36 in 3.0 mi North 29.9 mph 35.7 mph 0.10 in Rain Heavy Rain
12:32 AM 51.8 °F 48.2 °F 88% 29.34 in 4.0 mi North 27.6 mph 39.1 mph 0.18 in Rain Rain
12:52 AM 52.0 °F 48.0 °F 86% 29.34 in 4.0 mi North 32.2 mph 42.6 mph 0.25 in Rain Rain
1:52 AM 50.0 °F 46.0 °F 86% 29.31 in 5.0 mi North 28.8 mph 40.3 mph 0.14 in Rain Rain
2:52 AM 48.9 °F 45.0 °F 86% 29.30 in 5.0 mi North 32.2 mph 42.6 mph 0.15 in Rain Rain
3:52 AM 48.9 °F 44.1 °F 83% 29.31 in 8.0 mi North 28.8 mph 40.3 mph 0.10 in Rain Light Rain
4:52 AM 48.0 °F 44.1 °F 86% 29.32 in 8.0 mi North 24.2 mph 36.8 mph 0.09 in Rain Light Rain
5:33 AM 48.2 °F 44.6 °F 87% 29.33 in 6.0 mi North 27.6 mph 38.0 mph 0.05 in Rain Rain
5:52 AM 48.0 °F 44.1 °F 86% 29.34 in 4.0 mi North 24.2 mph 33.4 mph 0.10 in Rain Light Rain
6:17 AM 48.2 °F 44.6 °F 87% 29.36 in 4.0 mi North 23.0 mph 32.2 mph 0.03 in Rain Rain
6:32 AM 48.2 °F 44.6 °F 87% 29.37 in 4.0 mi North 25.3 mph 33.4 mph 0.05 in Rain Rain
6:52 AM 48.0 °F 45.0 °F 89% 29.39 in 3.0 mi North 23.0 mph - 0.09 in Rain Rain
7:21 AM 48.2 °F 44.6 °F 87% 29.41 in 2.5 mi NNW 21.9 mph 28.8 mph 0.07 in Rain Rain
7:29 AM 48.2 °F 44.6 °F 87% 29.41 in 2.0 mi NNW 21.9 mph 29.9 mph 0.09 in Rain Rain
7:52 AM 48.0 °F 45.0 °F 89% 29.43 in 2.5 mi NNW 21.9 mph 29.9 mph 0.16 in Rain Rain
8:27 AM 48.2 °F 46.4 °F 93% 29.46 in 3.0 mi North 20.7 mph 25.3 mph 0.07 in Rain Rain
8:52 AM 48.9 °F 46.0 °F 90% 29.48 in 5.0 mi NNW 20.7 mph - 0.11 in Rain Light Rain
9:33 AM 48.2 °F 46.4 °F 93% 29.50 in 3.0 mi NNW 18.4 mph 25.3 mph 0.06 in Rain Rain
9:52 AM 48.9 °F 46.0 °F 90% 29.52 in 6.0 mi North 18.4 mph - 0.08 in Rain Light Rain
10:04 AM 48.2 °F 46.4 °F 93% 29.52 in 5.0 mi North 23.0 mph 27.6 mph 0.01 in Rain Light Rain
10:52 AM 50.0 °F 45.0 °F 83% 29.55 in 7.0 mi NNW 23.0 mph 32.2 mph 0.05 in Rain Light Rain
11:52 AM 50.0 °F 46.0 °F 86% 29.60 in 6.0 mi NNW 21.9 mph 29.9 mph 0.03 in Rain Light Rain
12:52 PM 51.1 °F 46.0 °F 83% 29.63 in 10.0 mi NNW 23.0 mph 31.1 mph 0.05 in Rain Light Rain
1:52 PM 51.1 °F 46.0 °F 83% 29.66 in 7.0 mi North 21.9 mph - 0.05 in Rain Light Rain
2:52 PM 51.1 °F 46.9 °F 86% 29.70 in 9.0 mi NNW 18.4 mph - 0.02 in Rain Light Rain
3:17 PM 51.8 °F 44.6 °F 76% 29.71 in 8.0 mi NNW 18.4 mph 26.5 mph 0.03 in Rain Light Rain
3:52 PM 51.1 °F 46.0 °F 83% 29.72 in 10.0 mi NNW 23.0 mph 28.8 mph 0.04 in Rain Light Rain
4:52 PM 51.1 °F 46.0 °F 83% 29.76 in 10.0 mi NNW 15.0 mph - 0.01 in Rain Light Rain
5:12 PM 51.8 °F 46.4 °F 82% 29.78 in 9.0 mi North 18.4 mph - 0.00 in Rain Light Rain
5:15 PM 51.8 °F 46.4 °F 82% 29.78 in 9.0 mi North 16.1 mph 24.2 mph 0.00 in Rain Light Rain
5:38 PM 50.0 °F 46.4 °F 87% 29.79 in 2.0 mi NNE 12.7 mph - 0.02 in Rain Rain
5:49 PM 50.0 °F 44.6 °F 82% 29.81 in 6.0 mi North 18.4 mph 27.6 mph 0.06 in Rain Light Rain
5:52 PM 50.0 °F 45.0 °F 83% 29.81 in 10.0 mi North 19.6 mph 27.6 mph 0.06 in Rain Light Rain
5:56 PM 51.8 °F 44.6 °F 76% 29.81 in 10.0 mi North 18.4 mph 26.5 mph 0.00 in Rain Light Rain
6:52 PM 51.1 °F 45.0 °F 80% 29.83 in 10.0 mi North 13.8 mph 24.2 mph 0.00 in Rain Light Rain
7:52 PM 51.1 °F 46.0 °F 83% 29.87 in 10.0 mi North 15.0 mph - 0.00 in Rain Light Rain
8:52 PM 51.1 °F 45.0 °F 80% 29.90 in 10.0 mi North 10.4 mph - 0.00 in   Overcast
9:52 PM 51.1 °F 44.1 °F 77% 29.92 in 10.0 mi NNW 10.4 mph - N/A   Overcast
10:52 PM 51.1 °F 45.0 °F 80% 29.93 in 10.0 mi NW 11.5 mph - N/A   Overcast
11:52 PM 52.0 °F 45.0 °F 77% 29.93 in 10.0 mi WNW 12.7 mph - N/A   Overcast