Weather History for Seattle, WA

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Wednesday, August 21, 2013

  Actual Average Record
Temperature  
Mean Temperature 71 °F 66 °F  
Max Temperature 82 °F 76 °F 88 °F (1966)
Min Temperature 59 °F 56 °F 46 °F (1973)
Degree Days  
Heating Degree Days 0 1  
Month to date heating degree days 6 21  
Since 1 June heating degree days 64 214  
Since 1 July heating degree days 15 70  
Cooling Degree Days 6 2  
Month to date cooling degree days 106 56  
Year to date cooling degree days 281 154  
Since 1 June cooling degree days 268 148  
Growing Degree Days 20 (Base 50)    
Moisture  
Dew Point 50 °F    
Average Humidity 49    
Maximum Humidity 64    
Minimum Humidity 33    
Precipitation  
Precipitation 0.00 in 0.03 in 0.70 in (1989)
Month to date precipitation 0.27 0.52  
Year to date precipitation 18.32 20.23  
Sea Level Pressure  
Sea Level Pressure 30.05 in    
Wind  
Wind Speed 10 mph (NNE)    
Max Wind Speed 14 mph    
Max Gust Speed 20 mph    
Visibility 10 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Date:

Astronomy

Aug. 21, 2013 Rise Set
Actual Time 6:13 AM PDT 8:09 PM PDT
Civil Twilight 5:40 AM PDT 8:42 PM PDT
Nautical Twilight 5:00 AM PDT 9:22 PM PDT
Astronomical Twilight 4:15 AM PDT 10:07 PM PDT
Moon 8:11 PM PDT (8/21) 7:07 AM PDT (8/21)
Length of Visible Light 15h 01m
Length of Day
13h 55m
Full, 99% of the Moon is Illuminated
Aug 21
Full
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 64.0 °F 48.0 °F 56% 30.12 in 10.0 mi NE 10.4 mph - N/A   Clear
1:53 AM 62.1 °F 46.9 °F 58% 30.11 in 10.0 mi NE 9.2 mph - N/A   Clear
2:53 AM 61.0 °F 48.0 °F 62% 30.11 in 10.0 mi NNE 10.4 mph - N/A   Clear
3:53 AM 60.1 °F 48.0 °F 64% 30.10 in 10.0 mi NNE 9.2 mph - N/A   Clear
4:53 AM 60.1 °F 48.0 °F 64% 30.10 in 10.0 mi NNE 11.5 mph - N/A   Clear
5:53 AM 60.1 °F 48.0 °F 64% 30.10 in 10.0 mi NE 9.2 mph - N/A   Partly Cloudy
6:53 AM 60.1 °F 48.0 °F 64% 30.11 in 10.0 mi NNE 11.5 mph - N/A   Partly Cloudy
7:53 AM 62.1 °F 48.9 °F 62% 30.11 in 10.0 mi NNE 10.4 mph - N/A   Partly Cloudy
8:53 AM 64.9 °F 50.0 °F 58% 30.12 in 10.0 mi North 9.2 mph - N/A   Partly Cloudy
9:53 AM 69.1 °F 50.0 °F 51% 30.11 in 10.0 mi North 10.4 mph - N/A   Partly Cloudy
10:53 AM 73.0 °F 50.0 °F 44% 30.10 in 10.0 mi North 8.1 mph - N/A   Partly Cloudy
11:53 AM 75.9 °F 51.1 °F 42% 30.09 in 10.0 mi North 9.2 mph - N/A   Partly Cloudy
12:53 PM 77.0 °F 50.0 °F 39% 30.07 in 10.0 mi North 10.4 mph - N/A   Partly Cloudy
1:53 PM 80.1 °F 50.0 °F 35% 30.05 in 10.0 mi North 10.4 mph - N/A   Partly Cloudy
2:53 PM 82.0 °F 50.0 °F 33% 30.04 in 10.0 mi North 12.7 mph 19.6 mph 0.00 in   Scattered Clouds
3:53 PM 82.0 °F 51.1 °F 34% 30.01 in 10.0 mi NNW 11.5 mph - N/A   Scattered Clouds
4:53 PM 82.0 °F 52.0 °F 35% 29.99 in 10.0 mi North 10.4 mph - N/A   Scattered Clouds
5:53 PM 79.0 °F 52.0 °F 39% 29.99 in 10.0 mi NNW 10.4 mph - N/A   Scattered Clouds
6:53 PM 77.0 °F 51.1 °F 40% 29.98 in 10.0 mi North 11.5 mph - N/A   Scattered Clouds
7:53 PM 75.0 °F 52.0 °F 44% 29.98 in 10.0 mi North 6.9 mph - N/A   Scattered Clouds
8:53 PM 71.1 °F 51.1 °F 49% 29.98 in 10.0 mi North 9.2 mph - N/A   Scattered Clouds
9:53 PM 69.1 °F 51.1 °F 53% 29.99 in 10.0 mi North 8.1 mph - N/A   Scattered Clouds
10:53 PM 72.0 °F 52.0 °F 49% 29.99 in 10.0 mi NNE 9.2 mph - N/A   Scattered Clouds
11:53 PM 70.0 °F 50.0 °F 49% 29.97 in 10.0 mi NNE 8.1 mph - N/A   Partly Cloudy