Weather History for KBOS - April, 2011

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Thursday, April 21, 2011

  Actual Average Record
Temperature  
Mean Temperature 49 °F 50 °F  
Max Temperature 56 °F 58 °F 88 °F (1957)
Min Temperature 41 °F 42 °F 21 °F (1875)
Degree Days  
Heating Degree Days 16 15  
Month to date heating degree days 363 388  
Since 1 July heating degree days 5198 5259  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 0 0  
Moisture  
Dew Point 30 °F    
Average Humidity 62    
Maximum Humidity 96    
Minimum Humidity 27    
Precipitation  
Precipitation 0.00 in 0.11 in 3.32 in (1991)
Month to date precipitation 3.56 2.72  
Year to date precipitation 14.80 13.65  
Snow  
Snow 0.00 in 0.00 in 0.20 in (1947)
Month to date snowfall 0.9 1.8  
Since 1 July snowfall 81.0 43.7  
Snow Depth 0.00 in    
Sea Level Pressure  
Sea Level Pressure 30.00 in    
Wind  
Wind Speed 18 mph (WNW)    
Max Wind Speed 36 mph    
Max Gust Speed 46 mph    
Visibility 7 miles    
Events Fog    
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Astronomy

Apr. 21, 2011 Rise Set
Actual Time 5:54 AM EDT 7:32 PM EDT
Civil Twilight 5:24 AM EDT 8:01 PM EDT
Nautical Twilight 4:48 AM EDT 8:37 PM EDT
Astronomical Twilight 4:10 AM EDT 9:16 PM EDT
Moon No Moon Rise 8:16 AM EDT (4/21)
Length of Visible Light 14h 37m
Length of Day
13h 37m
Waning Gibbous, 83% of the Moon is Illuminated
Apr 21
Waning Gibbous
Apr 24
Last Quarter
May 3
New
May 10
First Quarter
May 17
Full

Hourly Weather History & Observations

Time (EDT) Temp. Windchill Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:54 AM 42.1 °F 40.2 °F 41.0 °F 96% 29.87 in 0.5 mi ENE 3.5 mph - N/A   Overcast
1:54 AM 42.1 °F - 41.0 °F 96% 29.87 in 0.5 mi Calm Calm - N/A   Overcast
2:09 AM 42.8 °F - 41.0 °F 93% 29.86 in 0.5 mi Calm Calm - N/A   Overcast
2:16 AM 42.8 °F - 41.0 °F 93% 29.87 in 0.5 mi Calm Calm - N/A   Overcast
2:25 AM 42.8 °F 41.1 °F 41.0 °F 93% 29.87 in 0.5 mi South 3.5 mph - N/A   Mist
2:54 AM 42.1 °F 40.2 °F 41.0 °F 96% 29.87 in 0.5 mi SSW 3.5 mph - N/A Fog Fog
3:39 AM 42.8 °F 40.1 °F 41.0 °F 93% 29.87 in 2.5 mi WSW 4.6 mph - N/A   Mostly Cloudy
3:48 AM 42.8 °F 41.1 °F 42.8 °F 100% 29.87 in 2.5 mi West 3.5 mph - N/A   Mostly Cloudy
3:54 AM 43.0 °F 41.3 °F 41.0 °F 93% 29.87 in 2.5 mi WSW 3.5 mph - N/A   Mostly Cloudy
4:26 AM 44.6 °F 38.1 °F 39.2 °F 81% 29.89 in 10.0 mi WNW 13.8 mph - N/A   Partly Cloudy
4:54 AM 46.0 °F 39.6 °F 36.0 °F 68% 29.90 in 10.0 mi WNW 15.0 mph 23.0 mph N/A   Partly Cloudy
5:54 AM 46.9 °F - 32.0 °F 56% 29.91 in 10.0 mi WNW 21.9 mph 32.2 mph N/A   Scattered Clouds
6:54 AM 46.9 °F - 30.0 °F 52% 29.92 in 10.0 mi WNW 17.3 mph - N/A   Scattered Clouds
7:54 AM 50.0 °F - 30.0 °F 46% 29.93 in 10.0 mi WNW 15.0 mph 24.2 mph N/A   Scattered Clouds
8:54 AM 51.1 °F - 30.0 °F 44% 29.95 in 10.0 mi West 17.3 mph - N/A   Scattered Clouds
9:54 AM 52.0 °F - 30.9 °F 45% 29.95 in 10.0 mi West 17.3 mph 29.9 mph N/A   Scattered Clouds
10:54 AM 52.0 °F - 28.9 °F 41% 29.97 in 10.0 mi West 21.9 mph 34.5 mph N/A   Mostly Cloudy
11:54 AM 52.0 °F - 27.0 °F 38% 29.99 in 10.0 mi West 29.9 mph 39.1 mph N/A   Mostly Cloudy
12:54 PM 54.0 °F - 26.1 °F 34% 29.97 in 10.0 mi West 26.5 mph 35.7 mph N/A   Scattered Clouds
1:54 PM 55.0 °F - 23.0 °F 29% 29.98 in 10.0 mi West 25.3 mph 41.4 mph N/A   Partly Cloudy
2:54 PM 55.9 °F - 23.0 °F 28% 29.99 in 10.0 mi West 25.3 mph 31.1 mph N/A   Scattered Clouds
3:54 PM 54.0 °F - 21.0 °F 28% 30.01 in 10.0 mi WNW 19.6 mph 34.5 mph N/A   Mostly Cloudy
4:54 PM 53.1 °F - 21.0 °F 29% 30.05 in 10.0 mi WNW 25.3 mph 34.5 mph N/A   Mostly Cloudy
5:54 PM 50.0 °F - 19.0 °F 29% 30.11 in 10.0 mi NW 26.5 mph 36.8 mph N/A   Mostly Cloudy
6:54 PM 46.9 °F - 17.1 °F 30% 30.17 in 10.0 mi NNW 24.2 mph 34.5 mph N/A   Mostly Cloudy
7:54 PM 46.0 °F 39.0 °F 18.0 °F 33% 30.22 in 10.0 mi NW 17.3 mph 26.5 mph N/A   Scattered Clouds
8:54 PM 44.1 °F 35.7 °F 19.0 °F 37% 30.26 in 10.0 mi NW 20.7 mph 26.5 mph N/A   Scattered Clouds
9:54 PM 43.0 °F 35.4 °F 19.9 °F 40% 30.28 in 10.0 mi NW 16.1 mph 21.9 mph N/A   Partly Cloudy
10:54 PM 42.1 °F 36.1 °F 21.0 °F 43% 30.30 in 10.0 mi WNW 10.4 mph - N/A   Clear
11:54 PM 42.1 °F 35.2 °F 21.0 °F 43% 30.32 in 10.0 mi WNW 12.7 mph - N/A   Clear