Boston, MA

2:40 AM EST on December 18, 2017 (GMT -0500)
Logan International

Weather History for KBOS - April, 2013

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Sunday, April 21, 2013

  Actual Average Record
Temperature  
Mean Temperature 44 °F 50 °F  
Max Temperature 50 °F 58 °F 88 °F (1957)
Min Temperature 37 °F 42 °F 21 °F (1875)
Degree Days  
Heating Degree Days 21 15  
Month to date heating degree days 351 388  
Since 1 July heating degree days 4992 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 22 °F    
Average Humidity 45    
Maximum Humidity 62    
Minimum Humidity 27    
Precipitation  
Precipitation 0.00 in 0.11 in 3.32 in (1991)
Month to date precipitation 1.21 2.72  
Year to date precipitation 10.87 13.65  
Sea Level Pressure  
Sea Level Pressure 30.51 in    
Wind  
Wind Speed 11 mph (NNW)    
Max Wind Speed 23 mph    
Max Gust Speed 31 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

Apr. 21, 2013 Rise Set
Actual Time 5:53 AM EDT 7:32 PM EDT
Civil Twilight 5:23 AM EDT 8:02 PM EDT
Nautical Twilight 4:47 AM EDT 8:38 PM EDT
Astronomical Twilight 4:09 AM EDT 9:17 PM EDT
Moon 3:09 PM EDT (4/21) 3:19 AM EDT (4/21)
Length of Visible Light 14h 38m
Length of Day
13h 39m
Waxing Gibbous, 79% of the Moon is Illuminated
Apr 21
Waxing Gibbous
Apr 25
Full
May 2
Last Quarter
May 9
New
May 18
First Quarter

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 44.1 °F 36.8 °F 19.9 °F 38% 30.25 in 10.0 mi NW 16.1 mph 26.5 mph N/A   Scattered Clouds
1:54 AM 41.0 °F 33.1 °F 19.9 °F 43% 30.28 in 10.0 mi NW 15.0 mph 27.6 mph N/A   Partly Cloudy
2:54 AM 39.0 °F 31.0 °F 17.1 °F 41% 30.32 in 10.0 mi NW 13.8 mph 28.8 mph N/A   Partly Cloudy
3:54 AM 37.9 °F 30.9 °F 18.0 °F 45% 30.34 in 10.0 mi WNW 10.4 mph 20.7 mph N/A   Clear
4:54 AM 37.0 °F 29.3 °F 17.1 °F 44% 30.36 in 10.0 mi WNW 11.5 mph - N/A   Partly Cloudy
5:54 AM 37.0 °F 28.5 °F 17.1 °F 44% 30.40 in 10.0 mi WNW 13.8 mph - N/A   Partly Cloudy
6:54 AM 37.9 °F 30.9 °F 19.0 °F 47% 30.45 in 10.0 mi WNW 10.4 mph - N/A   Clear
7:54 AM 39.9 °F 32.1 °F 19.0 °F 43% 30.48 in 10.0 mi NNW 13.8 mph - N/A   Clear
8:54 AM 41.0 °F 33.5 °F 18.0 °F 40% 30.51 in 10.0 mi North 13.8 mph 24.2 mph N/A   Clear
9:54 AM 43.0 °F 36.4 °F 19.0 °F 38% 30.52 in 10.0 mi NW 12.7 mph - N/A   Clear
10:54 AM 45.0 °F 42.6 °F 19.0 °F 36% 30.53 in 10.0 mi NNW 4.6 mph - N/A   Clear
11:54 AM 48.0 °F - 19.9 °F 33% 30.54 in 10.0 mi WNW 9.2 mph 19.6 mph N/A   Clear
12:54 PM 48.9 °F - 18.0 °F 29% 30.55 in 10.0 mi NNW 13.8 mph 19.6 mph N/A   Clear
1:54 PM 50.0 °F - 18.0 °F 28% 30.54 in 10.0 mi NNE 8.1 mph - N/A   Partly Cloudy
2:54 PM 46.9 °F - 26.1 °F 44% 30.55 in 10.0 mi SE 12.7 mph - N/A   Partly Cloudy
3:54 PM 48.0 °F - 28.0 °F 46% 30.56 in 10.0 mi ESE 12.7 mph - N/A   Scattered Clouds
4:54 PM 46.0 °F 39.6 °F 27.0 °F 47% 30.56 in 10.0 mi East 15.0 mph - N/A   Partly Cloudy
5:54 PM 46.0 °F 39.9 °F 28.0 °F 50% 30.58 in 10.0 mi ESE 13.8 mph - N/A   Partly Cloudy
6:54 PM 44.1 °F 38.1 °F 27.0 °F 51% 30.60 in 10.0 mi ESE 11.5 mph - N/A   Partly Cloudy
7:54 PM 43.0 °F 37.2 °F 28.9 °F 58% 30.63 in 10.0 mi ESE 10.4 mph - N/A   Partly Cloudy
8:54 PM 42.1 °F 37.1 °F 30.0 °F 62% 30.66 in 10.0 mi ESE 8.1 mph - N/A   Partly Cloudy
9:54 PM 41.0 °F 34.7 °F 28.0 °F 60% 30.68 in 10.0 mi South 10.4 mph - N/A   Scattered Clouds
10:54 PM 41.0 °F 37.1 °F 28.0 °F 60% 30.68 in 10.0 mi SW 5.8 mph - N/A   Partly Cloudy
11:54 PM 42.1 °F 40.2 °F 26.1 °F 53% 30.69 in 10.0 mi SSW 3.5 mph - N/A   Partly Cloudy