Seatac, WA

5:54 PM PDT on August 24, 2016 (GMT -0700)
Seattle-Tacoma International

Weather History for KSEA - August, 2013

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Monday, August 19, 2013

  Actual Average Record
Temperature  
Mean Temperature 70 °F 66 °F  
Max Temperature 80 °F 76 °F 95 °F (2016)
Min Temperature 60 °F 56 °F 47 °F (1947)
Degree Days  
Heating Degree Days 0 1  
Month to date heating degree days 6 19  
Since 1 June heating degree days 64 212  
Since 1 July heating degree days 15 68  
Cooling Degree Days 5 2  
Month to date cooling degree days 95 52  
Year to date cooling degree days 270 150  
Since 1 June cooling degree days 257 144  
Growing Degree Days 20 (Base 50)    
Moisture  
Dew Point 53 °F    
Average Humidity 64    
Maximum Humidity 84    
Minimum Humidity 43    
Precipitation  
Precipitation 0.00 in 0.03 in 0.88 in (1965)
Month to date precipitation 0.27 0.46  
Year to date precipitation 18.32 20.17  
Sea Level Pressure  
Sea Level Pressure 30.12 in    
Wind  
Wind Speed 7 mph (SW)    
Max Wind Speed 17 mph    
Max Gust Speed 21 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

Aug. 19, 2013 Rise Set
Actual Time 6:11 AM PDT 8:13 PM PDT
Civil Twilight 5:37 AM PDT 8:46 PM PDT
Nautical Twilight 4:56 AM PDT 9:27 PM PDT
Astronomical Twilight 4:11 AM PDT 10:12 PM PDT
Moon 7:07 PM PDT (8/19) 4:34 AM PDT (8/19)
Length of Visible Light 15h 08m
Length of Day
14h 02m
Waxing Gibbous, 98% of the Moon is Illuminated
Aug 19
Waxing Gibbous
Aug 20
Full
Aug 28
Last Quarter
Sep 5
New
Sep 12
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 66.9 °F 48.9 °F 52% 30.11 in 10.0 mi NE 5.8 mph - N/A   Mostly Cloudy
1:53 AM 66.0 °F 50.0 °F 56% 30.10 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
2:53 AM 63.0 °F 52.0 °F 67% 30.10 in 10.0 mi SW 3.5 mph - N/A   Mostly Cloudy
3:53 AM 62.1 °F 53.1 °F 72% 30.11 in 10.0 mi SSE 3.5 mph - N/A   Mostly Cloudy
4:53 AM 61.0 °F 54.0 °F 78% 30.11 in 10.0 mi SSW 3.5 mph - N/A   Mostly Cloudy
5:53 AM 61.0 °F 55.0 °F 81% 30.12 in 10.0 mi SSW 4.6 mph - N/A   Mostly Cloudy
6:53 AM 61.0 °F 55.0 °F 81% 30.13 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
7:53 AM 62.1 °F 55.0 °F 78% 30.13 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
8:53 AM 64.0 °F 54.0 °F 70% 30.14 in 10.0 mi South 5.8 mph - N/A   Mostly Cloudy
9:53 AM 64.0 °F 53.1 °F 67% 30.14 in 10.0 mi South 9.2 mph - N/A   Mostly Cloudy
10:53 AM 68.0 °F 54.0 °F 61% 30.15 in 10.0 mi West 4.6 mph - N/A   Mostly Cloudy
11:53 AM 71.1 °F 54.0 °F 55% 30.15 in 10.0 mi SSW 6.9 mph - N/A   Scattered Clouds
12:53 PM 75.9 °F 51.1 °F 42% 30.14 in 10.0 mi SSW 12.7 mph 17.3 mph N/A   Scattered Clouds
1:53 PM 75.0 °F 53.1 °F 46% 30.14 in 10.0 mi SW 8.1 mph - N/A   Partly Cloudy
2:53 PM 78.1 °F 55.0 °F 45% 30.13 in 10.0 mi SSW 6.9 mph - N/A   Scattered Clouds
3:53 PM 79.0 °F 55.0 °F 44% 30.11 in 10.0 mi South 8.1 mph - N/A   Scattered Clouds
4:53 PM 79.0 °F 55.0 °F 44% 30.11 in 10.0 mi WSW 6.9 mph - N/A   Scattered Clouds
5:53 PM 77.0 °F 55.0 °F 47% 30.10 in 10.0 mi WNW 6.9 mph - N/A   Scattered Clouds
6:53 PM 73.0 °F 54.0 °F 51% 30.10 in 10.0 mi North 15.0 mph - N/A   Partly Cloudy
7:53 PM 69.1 °F 53.1 °F 57% 30.10 in 10.0 mi North 6.9 mph - N/A   Partly Cloudy
8:53 PM 66.9 °F 51.1 °F 57% 30.11 in 10.0 mi North 9.2 mph - N/A   Partly Cloudy
9:53 PM 66.0 °F 51.1 °F 59% 30.13 in 10.0 mi North 6.9 mph - N/A   Partly Cloudy
10:53 PM 66.0 °F 50.0 °F 56% 30.14 in 10.0 mi NE 13.8 mph - N/A   Mostly Cloudy
11:53 PM 64.9 °F 48.9 °F 56% 30.13 in 10.0 mi NNE 10.4 mph - N/A   Mostly Cloudy