Seatac, WA

3:55 PM PST on February 07, 2016 (GMT -0800)
Seattle-Tacoma International

Weather History for KSEA - August, 2013

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Monday, August 12, 2013

  Actual Average Record
Temperature  
Mean Temperature 70 °F 67 °F  
Max Temperature 78 °F 77 °F 96 °F (1977)
Min Temperature 61 °F 56 °F 49 °F (1949)
Degree Days  
Heating Degree Days 0 1  
Month to date heating degree days 6 12  
Since 1 June heating degree days 64 205  
Since 1 July heating degree days 15 61  
Cooling Degree Days 5 3  
Month to date cooling degree days 58 36  
Year to date cooling degree days 233 134  
Since 1 June cooling degree days 220 128  
Growing Degree Days 20 (Base 50)    
Moisture  
Dew Point 53 °F    
Average Humidity 61    
Maximum Humidity 78    
Minimum Humidity 43    
Precipitation  
Precipitation 0.00 in 0.02 in 0.56 in (1965)
Month to date precipitation 0.17 0.25  
Year to date precipitation 18.22 19.96  
Sea Level Pressure  
Sea Level Pressure 30.08 in    
Wind  
Wind Speed 4 mph (SW)    
Max Wind Speed 12 mph    
Max Gust Speed 15 mph    
Visibility 10 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Daily Weather History Graph

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Date:

Astronomy

Aug. 12, 2013 Rise Set
Actual Time 6:01 AM PDT 8:25 PM PDT
Civil Twilight 5:27 AM PDT 8:59 PM PDT
Nautical Twilight 4:44 AM PDT 9:42 PM PDT
Astronomical Twilight 3:55 AM PDT 10:30 PM PDT
Moon 12:28 PM PDT (8/12) 10:51 PM PDT (8/12)
Length of Visible Light 15h 31m
Length of Day
14h 23m
Waxing Crescent, 32% of the Moon is Illuminated
Aug 12
Waxing Crescent
Aug 14
First Quarter
Aug 20
Full
Aug 28
Last Quarter
Sep 5
New

Hourly Weather History & Observations

Time (PDT) Temp. Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:53 AM 61.0 °F 52.0 °F 72% 30.06 in 10.0 mi Calm Calm - N/A   Scattered Clouds
1:53 AM 61.0 °F 53.1 °F 75% 30.06 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
2:53 AM 62.1 °F 53.1 °F 72% 30.05 in 10.0 mi South 4.6 mph - N/A   Mostly Cloudy
3:53 AM 61.0 °F 52.0 °F 72% 30.07 in 10.0 mi SSW 4.6 mph - N/A   Overcast
4:53 AM 61.0 °F 53.1 °F 75% 30.07 in 10.0 mi South 4.6 mph - N/A   Overcast
5:53 AM 61.0 °F 52.0 °F 72% 30.07 in 10.0 mi SSW 3.5 mph - N/A   Overcast
6:53 AM 62.1 °F 52.0 °F 70% 30.09 in 10.0 mi Calm Calm - N/A   Overcast
7:53 AM 62.1 °F 52.0 °F 70% 30.10 in 10.0 mi SSW 3.5 mph - N/A   Overcast
8:53 AM 63.0 °F 52.0 °F 67% 30.11 in 10.0 mi SSW 8.1 mph - N/A   Overcast
9:53 AM 64.0 °F 52.0 °F 65% 30.12 in 10.0 mi SW 5.8 mph - N/A   Mostly Cloudy
10:53 AM 66.9 °F 53.1 °F 61% 30.11 in 10.0 mi West 5.8 mph - N/A   Mostly Cloudy
11:53 AM 70.0 °F 53.1 °F 55% 30.11 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
12:53 PM 72.0 °F 54.0 °F 53% 30.10 in 10.0 mi Variable 6.9 mph - N/A   Mostly Cloudy
1:53 PM 73.9 °F 53.1 °F 48% 30.09 in 10.0 mi SSW 6.9 mph - N/A   Scattered Clouds
2:53 PM 75.9 °F 53.1 °F 45% 30.09 in 10.0 mi West 9.2 mph - N/A   Scattered Clouds
3:53 PM 75.0 °F 52.0 °F 44% 30.07 in 10.0 mi Variable 4.6 mph - N/A   Clear
4:53 PM 75.9 °F 52.0 °F 43% 30.06 in 10.0 mi Calm Calm - N/A   Scattered Clouds
5:53 PM 75.9 °F 52.0 °F 43% 30.05 in 10.0 mi West 5.8 mph - N/A   Scattered Clouds
6:53 PM 75.9 °F 52.0 °F 43% 30.05 in 10.0 mi SSW 4.6 mph - N/A   Scattered Clouds
7:53 PM 75.0 °F 52.0 °F 44% 30.05 in 10.0 mi WSW 8.1 mph - N/A   Mostly Cloudy
8:53 PM 70.0 °F 53.1 °F 55% 30.07 in 10.0 mi WNW 5.8 mph - N/A   Mostly Cloudy
9:53 PM 66.9 °F 54.0 °F 63% 30.09 in 10.0 mi NW 4.6 mph - N/A   Mostly Cloudy
10:53 PM 64.9 °F 54.0 °F 68% 30.10 in 10.0 mi West 3.5 mph - N/A   Mostly Cloudy
11:53 PM 66.0 °F 53.1 °F 63% 30.10 in 10.0 mi WSW 3.5 mph - N/A   Mostly Cloudy