Arlington, VA

2:14 PM EST on February 26, 2017 (GMT -0500)
Ronald Reagan Washington National

Weather History for KDCA - January, 2012

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Tuesday, January 31, 2012

  Actual Average Record
Temperature  
Mean Temperature 53 °F 37 °F  
Max Temperature 66 °F 44 °F 71 °F (1916)
Min Temperature 39 °F 29 °F -2 °F (1905)
Degree Days  
Heating Degree Days 12 28  
Month to date heating degree days 746 897  
Since 1 July heating degree days 1954 2380  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 0 0  
Growing Degree Days 2 (Base 50)    
Moisture  
Dew Point 28 °F    
Average Humidity 42    
Maximum Humidity 59    
Minimum Humidity 24    
Precipitation  
Precipitation 0.00 in 0.10 in 1.18 in (1878)
Month to date precipitation 2.19 2.81  
Year to date precipitation 2.19 2.81  
Snow  
Snow 0.00 in 0.20 in 5.70 in (1949)
Month to date snowfall 1.7 5.6  
Since 1 July snowfall 1.7 8.4  
Snow Depth 0.00 in    
Sea Level Pressure  
Sea Level Pressure 30.17 in    
Wind  
Wind Speed 11 mph (SSW)    
Max Wind Speed 21 mph    
Max Gust Speed 25 mph    
Visibility 10 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

Daily Weather History Graph

Daily Weather History Graph

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Date:

Astronomy

Jan. 31, 2012 Rise Set
Actual Time 7:15 AM EST 5:27 PM EST
Civil Twilight 6:47 AM EST 5:56 PM EST
Nautical Twilight 6:15 AM EST 6:28 PM EST
Astronomical Twilight 5:44 AM EST 6:59 PM EST
Moon 11:17 AM EST (1/31) 1:01 AM EST (1/31)
Length of Visible Light 11h 08m
Length of Day
10h 12m
First Quarter, 55% of the Moon is Illuminated
Jan 31
First Quarter
Feb 7
Full
Feb 14
Last Quarter
Feb 21
New
Feb 29
First Quarter

Hourly Weather History & Observations

Time (EST) Temp. Windchill Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:52 AM 43.0 °F 37.7 °F 21.9 °F 43% 30.23 in 10.0 mi SSW 9.2 mph - N/A   Partly Cloudy
1:52 AM 43.0 °F 37.7 °F 23.0 °F 45% 30.23 in 10.0 mi SSW 9.2 mph - N/A   Partly Cloudy
2:52 AM 43.0 °F 38.2 °F 24.1 °F 47% 30.21 in 10.0 mi SSW 8.1 mph - N/A   Partly Cloudy
3:52 AM 42.1 °F 37.1 °F 25.0 °F 51% 30.21 in 10.0 mi SSW 8.1 mph - N/A   Partly Cloudy
4:52 AM 41.0 °F 36.4 °F 25.0 °F 53% 30.22 in 10.0 mi SSW 6.9 mph - N/A   Clear
5:52 AM 39.9 °F 34.5 °F 26.1 °F 58% 30.22 in 10.0 mi SSW 8.1 mph - N/A   Partly Cloudy
6:52 AM 39.9 °F 36.7 °F 26.1 °F 58% 30.23 in 10.0 mi SW 4.6 mph - N/A   Mostly Cloudy
7:52 AM 43.0 °F 38.2 °F 26.1 °F 51% 30.24 in 10.0 mi SSW 8.1 mph - N/A   Mostly Cloudy
8:52 AM 45.0 °F 40.6 °F 30.0 °F 56% 30.25 in 10.0 mi South 8.1 mph - N/A   Overcast
9:52 AM 51.1 °F - 27.0 °F 39% 30.25 in 10.0 mi SSW 11.5 mph - N/A   Mostly Cloudy
10:52 AM 51.1 °F - 30.9 °F 46% 30.24 in 10.0 mi South 12.7 mph - N/A   Mostly Cloudy
11:52 AM 57.0 °F - 30.0 °F 36% 30.21 in 10.0 mi South 9.2 mph - N/A   Mostly Cloudy
12:52 PM 61.0 °F - 28.0 °F 29% 30.17 in 10.0 mi SSW 13.8 mph - N/A   Mostly Cloudy
1:52 PM 64.0 °F - 28.9 °F 27% 30.14 in 10.0 mi South 18.4 mph - N/A   Scattered Clouds
2:52 PM 64.9 °F - 28.9 °F 26% 30.12 in 10.0 mi SSW 18.4 mph 24.2 mph N/A   Scattered Clouds
3:52 PM 64.9 °F - 28.0 °F 25% 30.11 in 10.0 mi SSW 17.3 mph - N/A   Scattered Clouds
4:52 PM 64.0 °F - 27.0 °F 25% 30.10 in 10.0 mi SSW 15.0 mph 21.9 mph N/A   Scattered Clouds
5:52 PM 60.1 °F - 28.0 °F 30% 30.11 in 10.0 mi SSW 11.5 mph - N/A   Scattered Clouds
6:52 PM 53.1 °F - 33.1 °F 47% 30.11 in 10.0 mi SSW 10.4 mph - N/A   Partly Cloudy
7:52 PM 57.9 °F - 28.0 °F 32% 30.11 in 10.0 mi SSW 12.7 mph - N/A   Partly Cloudy
8:52 PM 55.9 °F - 28.9 °F 36% 30.11 in 10.0 mi SSW 12.7 mph - N/A   Scattered Clouds
9:52 PM 55.0 °F - 30.0 °F 38% 30.12 in 10.0 mi SSW 10.4 mph - N/A   Scattered Clouds
10:52 PM 55.9 °F - 30.9 °F 39% 30.10 in 10.0 mi SSW 11.5 mph - N/A   Scattered Clouds
11:52 PM 55.0 °F - 32.0 °F 42% 30.09 in 10.0 mi SSW 11.5 mph - N/A   Scattered Clouds