Seatac, WA

7:06 AM PDT on July 24, 2016 (GMT -0700)
Seattle-Tacoma International

Weather History for KSEA - September, 2013

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Sunday, September 15, 2013

  Actual Average Record
Temperature  
Mean Temperature 62 °F 62 °F  
Max Temperature 66 °F 71 °F 93 °F (1967)
Min Temperature 58 °F 52 °F 42 °F (1952)
Degree Days  
Heating Degree Days 3 4  
Month to date heating degree days 6 43  
Since 1 July heating degree days 21 128  
Cooling Degree Days 0 1  
Month to date cooling degree days 55 15  
Year to date cooling degree days 385 183  
Growing Degree Days 10 (Base 50)    
Moisture  
Dew Point 58 °F    
Average Humidity 86    
Maximum Humidity 93    
Minimum Humidity 78    
Precipitation  
Precipitation 0.13 in 0.05 in 0.69 in (1959)
Month to date precipitation 2.16 0.64  
Year to date precipitation 21.56 21.23  
Sea Level Pressure  
Sea Level Pressure 29.79 in    
Wind  
Wind Speed 5 mph (SSW)    
Max Wind Speed 13 mph    
Max Gust Speed 16 mph    
Visibility 6 miles    
Events Fog , Rain , Thunderstorm    
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

Sep. 15, 2013 Rise Set
Actual Time 6:47 AM PDT 7:20 PM PDT
Civil Twilight 6:16 AM PDT 7:51 PM PDT
Nautical Twilight 5:39 AM PDT 8:27 PM PDT
Astronomical Twilight 5:01 AM PDT 9:05 PM PDT
Moon 5:03 PM PDT (9/15) 2:17 AM PDT (9/15)
Length of Visible Light 13h 35m
Length of Day
12h 33m
Waxing Gibbous, 83% of the Moon is Illuminated
Sep 15
Waxing Gibbous
Sep 19
Full
Sep 26
Last Quarter
Oct 4
New
Oct 11
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 60.1 °F 55.9 °F 86% 29.76 in 8.0 mi Calm Calm - N/A   Clear
1:23 AM 59.0 °F 55.4 °F 88% 29.74 in 7.0 mi Calm Calm - N/A   Scattered Clouds
1:36 AM 59.0 °F 55.4 °F 88% 29.74 in 7.0 mi Calm Calm - N/A   Mostly Cloudy
1:53 AM 60.1 °F 55.9 °F 86% 29.76 in 5.0 mi Calm Calm - N/A   Overcast
2:53 AM 60.1 °F 55.9 °F 86% 29.76 in 5.0 mi Calm Calm - N/A   Overcast
3:25 AM 59.0 °F 55.4 °F 88% 29.75 in 1.0 mi Calm Calm - N/A   Overcast
3:53 AM 59.0 °F 55.9 °F 90% 29.76 in 0.8 mi Calm Calm - N/A   Overcast
3:55 AM 59.0 °F 55.4 °F 88% 29.75 in 1.5 mi Calm Calm - N/A   Overcast
4:02 AM 59.0 °F 55.4 °F 88% 29.75 in 0.8 mi Calm Calm - N/A   Overcast
4:53 AM 57.9 °F 55.0 °F 90% 29.76 in 0.5 mi WNW 3.5 mph - N/A Fog Fog
5:53 AM 57.9 °F 55.9 °F 93% 29.75 in 1.2 mi Calm Calm - N/A   Overcast
6:17 AM 57.2 °F 55.4 °F 94% 29.74 in 0.8 mi West 3.5 mph - N/A   Overcast
6:25 AM 57.2 °F 55.4 °F 94% 29.74 in 0.5 mi WNW 3.5 mph - N/A Fog Fog
6:46 AM 57.2 °F 55.4 °F 94% 29.74 in 0.2 mi WNW 4.6 mph - N/A Fog Fog
6:53 AM 57.9 °F 55.0 °F 90% 29.75 in 0.2 mi West 4.6 mph - N/A Fog Fog
7:53 AM 57.9 °F 55.0 °F 90% 29.76 in 0.2 mi West 3.5 mph - N/A Fog Fog
8:21 AM 57.2 °F 55.4 °F 94% 29.75 in 0.2 mi SW 3.5 mph - N/A Fog Fog
8:31 AM 57.2 °F 55.4 °F 94% 29.75 in 0.2 mi Calm Calm - N/A Fog Fog
8:53 AM 57.9 °F 55.9 °F 93% 29.78 in 0.2 mi WSW 3.5 mph - N/A Fog Fog
9:19 AM 59.0 °F 57.2 °F 94% 29.76 in 0.2 mi NNW 3.5 mph - N/A Fog Fog
9:33 AM 59.0 °F 57.2 °F 94% 29.76 in 0.2 mi Calm Calm - 0.00 in Fog , Rain Rain
9:47 AM 60.8 °F 57.2 °F 88% 29.76 in 1.5 mi Calm Calm - 0.01 in Rain Light Rain
9:53 AM 60.1 °F 57.0 °F 90% 29.78 in 2.5 mi Calm Calm - 0.01 in   Overcast
10:17 AM 60.8 °F 57.2 °F 88% 29.77 in 4.0 mi South 3.5 mph - N/A   Overcast
10:44 AM 62.6 °F 57.2 °F 82% 29.76 in 1.2 mi East 4.6 mph - N/A   Overcast
10:53 AM 63.0 °F 57.9 °F 84% 29.78 in 1.2 mi Variable 3.5 mph - N/A   Overcast
11:17 AM 62.6 °F 57.2 °F 82% 29.77 in 8.0 mi South 4.6 mph - N/A   Overcast
11:42 AM 64.4 °F 59.0 °F 83% 29.77 in 10.0 mi SSW 5.8 mph - N/A   Overcast
11:53 AM 63.0 °F 57.9 °F 84% 29.79 in 10.0 mi SW 6.9 mph - N/A   Overcast
12:27 PM 62.6 °F 59.0 °F 88% 29.78 in 6.0 mi SW 4.6 mph - N/A   Overcast
12:53 PM 63.0 °F 59.0 °F 87% 29.79 in 4.0 mi SSE 10.4 mph - N/A   Overcast
1:40 PM 64.4 °F 59.0 °F 83% 29.79 in 6.0 mi South 8.1 mph - N/A   Overcast
1:53 PM 64.9 °F 59.0 °F 81% 29.80 in 8.0 mi South 6.9 mph - N/A   Overcast
2:53 PM 66.0 °F 59.0 °F 78% 29.80 in 10.0 mi SSW 8.1 mph - N/A   Overcast
3:53 PM 64.9 °F 60.1 °F 84% 29.81 in 10.0 mi SW 4.6 mph - 0.00 in   Overcast
4:06 PM 64.4 °F 60.8 °F 88% 29.79 in 10.0 mi South 6.9 mph - N/A   Overcast
4:16 PM 64.4 °F 60.8 °F 88% 29.79 in 10.0 mi SSW 5.8 mph - 0.00 in Rain , Thunderstorm Light Thunderstorms and Rain
4:41 PM 64.4 °F 57.2 °F 77% 29.80 in 10.0 mi SSW 8.1 mph - 0.00 in   Overcast
4:53 PM 64.9 °F 59.0 °F 81% 29.83 in 10.0 mi SW 6.9 mph - 0.00 in Rain Light Rain
5:04 PM 64.4 °F 59.0 °F 83% 29.81 in 10.0 mi SW 8.1 mph - 0.00 in Rain , Thunderstorm Light Thunderstorms and Rain
5:53 PM 63.0 °F 57.9 °F 84% 29.83 in 10.0 mi SSW 6.9 mph - 0.03 in Rain , Thunderstorm Light Thunderstorms and Rain
6:15 PM 62.6 °F 59.0 °F 88% 29.81 in 5.0 mi SSW 4.6 mph - 0.04 in Rain , Thunderstorm Thunderstorms and Rain
6:53 PM 63.0 °F 59.0 °F 87% 29.83 in 10.0 mi SSE 5.8 mph - 0.09 in Rain , Thunderstorm Light Thunderstorms and Rain
7:07 PM 62.6 °F 59.0 °F 88% 29.81 in 10.0 mi South 6.9 mph - 0.00 in   Overcast
7:32 PM 64.4 °F 59.0 °F 83% 29.82 in 10.0 mi South 8.1 mph - 0.00 in   Overcast
7:45 PM 62.6 °F 59.0 °F 88% 29.81 in 10.0 mi South 4.6 mph - 0.00 in   Overcast
7:53 PM 63.0 °F 60.1 °F 90% 29.83 in 10.0 mi SSE 5.8 mph - 0.00 in   Overcast
8:07 PM 62.6 °F 60.8 °F 94% 29.81 in 10.0 mi South 5.8 mph - N/A   Overcast
8:53 PM 64.0 °F 60.1 °F 87% 29.86 in 10.0 mi SSE 8.1 mph - N/A   Overcast
9:18 PM 64.4 °F 60.8 °F 88% 29.84 in 10.0 mi South 5.8 mph - N/A   Overcast
9:53 PM 63.0 °F 60.1 °F 90% 29.85 in 10.0 mi South 4.6 mph - N/A   Overcast
10:06 PM 62.6 °F 60.8 °F 94% 29.84 in 10.0 mi SSE 5.8 mph - N/A   Overcast
10:53 PM 63.0 °F 59.0 °F 87% 29.85 in 10.0 mi South 6.9 mph - N/A   Overcast
11:53 PM 63.0 °F 57.9 °F 84% 29.85 in 10.0 mi South 6.9 mph - N/A   Mostly Cloudy