Weather History for KSEA - September, 2013

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Friday, September 13, 2013

  Actual Average Record
Temperature  
Mean Temperature 63 °F 62 °F  
Max Temperature 66 °F 72 °F 87 °F (1999)
Min Temperature 60 °F 53 °F 39 °F (1952)
Degree Days  
Heating Degree Days 2 4  
Month to date heating degree days 3 35  
Since 1 July heating degree days 18 120  
Cooling Degree Days 0 1  
Month to date cooling degree days 54 13  
Year to date cooling degree days 384 181  
Growing Degree Days 13 (Base 50)    
Moisture  
Dew Point 58 °F    
Average Humidity 88    
Maximum Humidity 97    
Minimum Humidity 78    
Precipitation  
Precipitation 0.00 in 0.05 in 0.51 in (1955)
Month to date precipitation 2.03 0.55  
Year to date precipitation 21.43 21.14  
Sea Level Pressure  
Sea Level Pressure 29.97 in    
Wind  
Wind Speed 4 mph (SW)    
Max Wind Speed 9 mph    
Max Gust Speed 12 mph    
Visibility 5 miles    
Events Fog    
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Date:

Astronomy

Sep. 13, 2013 Rise Set
Actual Time 6:44 AM PDT 7:24 PM PDT
Civil Twilight 6:13 AM PDT 7:55 PM PDT
Nautical Twilight 5:36 AM PDT 8:32 PM PDT
Astronomical Twilight 4:57 AM PDT 9:10 PM PDT
Moon 3:36 PM PDT (9/13) 12:00 AM PDT (9/13)
Length of Visible Light 13h 42m
Length of Day
12h 40m
Waxing Gibbous, 62% of the Moon is Illuminated
Sep 13
Waxing Gibbous
Sep 19
Full
Sep 26
Last Quarter
Oct 4
New
Oct 11
First Quarter

Hourly Weather History & Observations

Time (PDT) Temp. Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:53 AM 63.0 °F 57.9 °F 84% 29.97 in 10.0 mi Calm Calm - N/A   Clear
1:53 AM 61.0 °F 57.9 °F 90% 29.98 in 0.8 mi SSW 6.9 mph - N/A   Mostly Cloudy
2:31 AM 60.8 °F 57.2 °F 88% 29.96 in 0.2 mi SSW 4.6 mph - N/A Fog Fog
2:53 AM 60.1 °F 57.9 °F 93% 29.98 in 0.1 mi SSW 6.9 mph - N/A Fog Fog
3:53 AM 60.1 °F 57.9 °F 93% 29.99 in 0.2 mi SW 6.9 mph - N/A Fog Fog
4:46 AM 60.8 °F 57.2 °F 88% 29.99 in 0.2 mi SW 8.1 mph - N/A Fog Fog
4:53 AM 60.1 °F 57.9 °F 93% 30.00 in 0.2 mi SSW 5.8 mph - N/A Fog Fog
5:26 AM 60.8 °F 57.2 °F 88% 29.99 in 0.2 mi SSW 5.8 mph - N/A Fog Fog
5:40 AM 60.8 °F 57.2 °F 88% 29.99 in 0.2 mi SSW 6.9 mph - N/A Fog Fog
5:53 AM 60.1 °F 57.9 °F 93% 30.01 in 0.5 mi SSW 5.8 mph - N/A Fog Fog
6:53 AM 60.1 °F 57.9 °F 93% 30.01 in 0.2 mi SW 5.8 mph - N/A   Overcast
7:53 AM 61.0 °F 59.0 °F 93% 30.00 in 0.2 mi SSW 3.5 mph - N/A   Overcast
8:47 AM 60.8 °F 57.2 °F 88% 29.99 in 1.5 mi WSW 4.6 mph - N/A   Overcast
8:53 AM 61.0 °F 57.9 °F 90% 30.00 in 1.5 mi West 4.6 mph - N/A   Overcast
9:53 AM 61.0 °F 57.9 °F 90% 30.00 in 1.5 mi West 3.5 mph - N/A   Overcast
10:53 AM 63.0 °F 57.9 °F 84% 30.00 in 5.0 mi SW 5.8 mph - N/A   Haze
11:40 AM 62.6 °F 57.2 °F 82% 29.98 in 6.0 mi SSW 5.8 mph - N/A   Haze
11:53 AM 64.0 °F 57.9 °F 80% 29.99 in 8.0 mi SW 5.8 mph - N/A   Overcast
12:17 PM 64.4 °F 57.2 °F 77% 29.97 in 8.0 mi Variable 5.8 mph - N/A   Overcast
12:53 PM 64.0 °F 57.9 °F 80% 29.99 in 10.0 mi WSW 5.8 mph - N/A   Overcast
1:53 PM 64.9 °F 57.9 °F 78% 29.98 in 10.0 mi SW 5.8 mph - N/A   Overcast
2:53 PM 64.9 °F 57.9 °F 78% 29.96 in 10.0 mi West 3.5 mph - N/A   Overcast
3:53 PM 64.9 °F 57.9 °F 78% 29.95 in 10.0 mi WSW 4.6 mph - N/A   Overcast
4:53 PM 64.9 °F 57.9 °F 78% 29.94 in 10.0 mi South 4.6 mph - N/A   Overcast
5:53 PM 64.9 °F 57.9 °F 78% 29.93 in 10.0 mi SW 5.8 mph - N/A   Overcast
6:53 PM 64.0 °F 57.9 °F 80% 29.92 in 10.0 mi WSW 4.6 mph - N/A   Overcast
7:53 PM 64.0 °F 59.0 °F 84% 29.93 in 10.0 mi SW 3.5 mph - N/A   Overcast
8:53 PM 64.0 °F 59.0 °F 84% 29.93 in 10.0 mi Calm Calm - N/A   Overcast
9:53 PM 64.0 °F 59.0 °F 84% 29.93 in 10.0 mi Calm Calm - N/A   Overcast
10:53 PM 64.0 °F 59.0 °F 84% 29.93 in 10.0 mi West 3.5 mph - N/A   Overcast
11:53 PM 64.0 °F 59.0 °F 84% 29.91 in 10.0 mi Calm Calm - N/A   Overcast