Weather History for Seattle, WA

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Monday, May 20, 2013

  Actual Average Record
Temperature  
Mean Temperature 58 °F 57 °F  
Max Temperature 67 °F 66 °F 92 °F (1963)
Min Temperature 49 °F 48 °F 40 °F (1960)
Degree Days  
Heating Degree Days 7 8  
Month to date heating degree days 96 202  
Since 1 July heating degree days 4176 4470  
Cooling Degree Days 0 0  
Month to date cooling degree days 13 0  
Year to date cooling degree days 13 0  
Growing Degree Days 7 (Base 50)    
Moisture  
Dew Point 46 °F    
Average Humidity 68    
Maximum Humidity 93    
Minimum Humidity 42    
Precipitation  
Precipitation 0.00 in 0.06 in 0.56 in (2007)
Month to date precipitation 0.45 1.25  
Year to date precipitation 14.82 16.75  
Sea Level Pressure  
Sea Level Pressure 30.20 in    
Wind  
Wind Speed 4 mph (WSW)    
Max Wind Speed 13 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

May. 20, 2013 Rise Set
Actual Time 5:26 AM PDT 8:46 PM PDT
Civil Twilight 4:48 AM PDT 9:23 PM PDT
Nautical Twilight 3:59 AM PDT 10:12 PM PDT
Astronomical Twilight 2:57 AM PDT 11:16 PM PDT
Moon 3:41 PM PDT (5/20) 2:44 AM PDT (5/20)
Length of Visible Light 16h 34m
Length of Day
15h 19m
Waxing Gibbous, 76% of the Moon is Illuminated
May 20
Waxing Gibbous
May 24
Full
May 31
Last Quarter
Jun 8
New
Jun 16
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 51.8 °F 46.4 °F 82% 30.36 in 10.0 mi WNW 4.6 mph - N/A   Scattered Clouds
1:53 AM 51.1 °F 46.9 °F 86% 30.38 in 10.0 mi West 5.8 mph - N/A   Scattered Clouds
2:53 AM 50.0 °F 45.0 °F 83% 30.38 in 10.0 mi Calm Calm - N/A   Scattered Clouds
3:53 AM 48.9 °F 46.0 °F 90% 30.38 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
4:32 AM 50.0 °F 46.4 °F 87% 30.34 in 10.0 mi Calm Calm - N/A   Overcast
4:53 AM 50.0 °F 46.4 °F 87% 30.34 in 10.0 mi SSW 4.6 mph - N/A   Overcast
5:53 AM 50.0 °F 46.0 °F 86% 30.34 in 10.0 mi Calm Calm - N/A   Overcast
6:53 AM 50.0 °F 46.0 °F 86% 30.33 in 10.0 mi West 3.5 mph - N/A   Overcast
7:53 AM 50.0 °F 46.0 °F 86% 30.31 in 9.0 mi SW 3.5 mph - N/A   Overcast
8:53 AM 51.1 °F 46.0 °F 83% 30.31 in 10.0 mi SW 4.6 mph - N/A   Overcast
9:53 AM 53.1 °F 46.9 °F 80% 30.29 in 10.0 mi Calm Calm - N/A   Overcast
10:30 AM 53.6 °F 46.4 °F 77% 30.25 in 10.0 mi Calm Calm - N/A   Overcast
10:53 AM 53.6 °F 46.4 °F 77% 30.24 in 10.0 mi Calm Calm - N/A   Overcast
11:46 AM 55.4 °F 46.4 °F 72% 30.22 in 10.0 mi West 6.9 mph - N/A   Overcast
11:53 AM 55.9 °F 46.9 °F 72% 30.24 in 10.0 mi West 5.8 mph - N/A   Mostly Cloudy
12:32 PM 60.8 °F 46.4 °F 59% 30.20 in 10.0 mi SW 4.6 mph - N/A   Scattered Clouds
12:53 PM 60.1 °F 46.9 °F 62% 30.21 in 10.0 mi Calm Calm - N/A   Scattered Clouds
1:53 PM 63.0 °F 48.0 °F 58% 30.18 in 10.0 mi Calm Calm - N/A   Scattered Clouds
2:53 PM 63.0 °F 45.0 °F 52% 30.15 in 10.0 mi South 5.8 mph - N/A   Scattered Clouds
3:53 PM 64.9 °F 44.1 °F 47% 30.12 in 10.0 mi South 6.9 mph - N/A   Mostly Cloudy
4:53 PM 66.0 °F 42.1 °F 42% 30.07 in 10.0 mi SSW 5.8 mph - N/A   Mostly Cloudy
5:53 PM 66.0 °F 43.0 °F 43% 30.04 in 10.0 mi SSW 3.5 mph - N/A   Mostly Cloudy
7:53 PM 62.1 °F 46.9 °F 58% 30.00 in 10.0 mi NW 8.1 mph - N/A   Mostly Cloudy
8:53 PM 57.0 °F 46.0 °F 67% 29.99 in 10.0 mi NNW 6.9 mph - N/A   Mostly Cloudy
9:53 PM 57.0 °F 45.0 °F 64% 29.97 in 10.0 mi North 5.8 mph - N/A   Mostly Cloudy
10:53 PM 57.0 °F 45.0 °F 64% 29.95 in 10.0 mi NNE 10.4 mph - N/A   Mostly Cloudy
11:53 PM 55.9 °F 46.0 °F 69% 29.94 in 10.0 mi NW 4.6 mph - N/A   Overcast