Weather History for KSEA - August, 2013

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Thursday, August 22, 2013

  Actual Average Record
Temperature  
Mean Temperature 72 °F 66 °F  
Max Temperature 84 °F 76 °F 86 °F (1956)
Min Temperature 59 °F 56 °F 45 °F (1960)
Degree Days  
Heating Degree Days 0 1  
Month to date heating degree days 6 22  
Since 1 June heating degree days 64 215  
Since 1 July heating degree days 15 71  
Cooling Degree Days 7 2  
Month to date cooling degree days 113 58  
Year to date cooling degree days 288 156  
Since 1 June cooling degree days 275 150  
Growing Degree Days 22 (Base 50)    
Moisture  
Dew Point 51 °F    
Average Humidity 52    
Maximum Humidity 69    
Minimum Humidity 34    
Precipitation  
Precipitation 0.00 in 0.03 in 1.41 in (2001)
Month to date precipitation 0.27 0.55  
Year to date precipitation 18.32 20.26  
Sea Level Pressure  
Sea Level Pressure 29.91 in    
Wind  
Wind Speed 4 mph (WNW)    
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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Astronomy

Aug. 22, 2013 Rise Set
Actual Time 6:15 AM PDT 8:07 PM PDT
Civil Twilight 5:42 AM PDT 8:40 PM PDT
Nautical Twilight 5:01 AM PDT 9:20 PM PDT
Astronomical Twilight 4:17 AM PDT 10:04 PM PDT
Moon 8:40 PM PDT (8/22) 8:22 AM PDT (8/22)
Length of Visible Light 14h 58m
Length of Day
13h 52m
Waning Gibbous, 96% of the Moon is Illuminated
Aug 22
Waning Gibbous
Aug 28
Last Quarter
Sep 5
New
Sep 12
First Quarter
Sep 19
Full

Hourly Weather History & Observations

Time (PDT) Temp. Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:53 AM 66.0 °F 48.9 °F 54% 29.97 in 10.0 mi NNW 6.9 mph - N/A   Scattered Clouds
1:53 AM 66.0 °F 50.0 °F 56% 29.96 in 10.0 mi North 4.6 mph - N/A   Scattered Clouds
2:53 AM 64.9 °F 48.9 °F 56% 29.95 in 10.0 mi North 5.8 mph - N/A   Partly Cloudy
3:53 AM 64.0 °F 48.9 °F 58% 29.96 in 10.0 mi NNE 3.5 mph - N/A   Partly Cloudy
4:53 AM 63.0 °F 50.0 °F 63% 29.95 in 10.0 mi North 4.6 mph - N/A   Partly Cloudy
5:53 AM 63.0 °F 50.0 °F 63% 29.95 in 10.0 mi Calm Calm - N/A   Scattered Clouds
6:53 AM 61.0 °F 50.0 °F 67% 29.96 in 10.0 mi Calm Calm - N/A   Scattered Clouds
7:53 AM 66.0 °F 52.0 °F 60% 29.95 in 10.0 mi NE 8.1 mph - N/A   Scattered Clouds
8:53 AM 71.1 °F 53.1 °F 53% 29.95 in 10.0 mi Calm Calm - N/A   Partly Cloudy
9:53 AM 71.1 °F 53.1 °F 53% 29.95 in 10.0 mi Calm Calm - N/A   Scattered Clouds
10:53 AM 73.9 °F 53.1 °F 48% 29.94 in 10.0 mi West 5.8 mph - N/A   Mostly Cloudy
11:53 AM 75.0 °F 51.1 °F 43% 29.93 in 10.0 mi West 8.1 mph - N/A   Mostly Cloudy
12:53 PM 81.0 °F 52.0 °F 36% 29.91 in 10.0 mi Variable 3.5 mph - N/A   Mostly Cloudy
1:53 PM 82.0 °F 52.0 °F 35% 29.90 in 10.0 mi West 5.8 mph - N/A   Mostly Cloudy
2:53 PM 82.0 °F 52.0 °F 35% 29.89 in 10.0 mi WNW 10.4 mph - N/A   Mostly Cloudy
3:53 PM 81.0 °F 52.0 °F 36% 29.87 in 10.0 mi WNW 5.8 mph - N/A   Mostly Cloudy
4:53 PM 81.0 °F 52.0 °F 36% 29.85 in 10.0 mi WNW 4.6 mph - N/A   Overcast
5:53 PM 82.0 °F 52.0 °F 35% 29.84 in 10.0 mi West 4.6 mph - N/A   Mostly Cloudy
6:53 PM 78.1 °F 52.0 °F 40% 29.86 in 10.0 mi West 3.5 mph - N/A   Mostly Cloudy
7:53 PM 73.9 °F 52.0 °F 46% 29.86 in 10.0 mi WNW 5.8 mph - N/A   Mostly Cloudy
8:53 PM 75.0 °F 52.0 °F 44% 29.87 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
9:53 PM 75.9 °F 52.0 °F 43% 29.87 in 10.0 mi SW 3.5 mph - N/A   Mostly Cloudy
10:53 PM 71.1 °F 53.1 °F 53% 29.87 in 10.0 mi South 5.8 mph - N/A   Mostly Cloudy
11:53 PM 71.1 °F 50.0 °F 47% 29.86 in 10.0 mi SW 4.6 mph - N/A   Mostly Cloudy