Seattle, WA

5:05 PM PDT on August 18, 2017 (GMT -0700)
Seattle-Tacoma International

Weather History for KSEA - September, 2013

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Monday, September 16, 2013

  Actual Average Record
Temperature  
Mean Temperature 65 °F 61 °F  
Max Temperature 71 °F 71 °F 91 °F (1967)
Min Temperature 59 °F 52 °F 44 °F (1952)
Degree Days  
Heating Degree Days 0 4  
Month to date heating degree days 6 47  
Since 1 July heating degree days 21 132  
Cooling Degree Days 0 1  
Month to date cooling degree days 55 16  
Year to date cooling degree days 385 184  
Growing Degree Days 16 (Base 50)    
Moisture  
Dew Point 56 °F    
Average Humidity 71    
Maximum Humidity 84    
Minimum Humidity 57    
Precipitation  
Precipitation 0.01 in 0.05 in 0.76 in (1997)
Month to date precipitation 2.17 0.69  
Year to date precipitation 21.57 21.28  
Sea Level Pressure  
Sea Level Pressure 29.93 in    
Wind  
Wind Speed 10 mph (South)    
Max Wind Speed 16 mph    
Max Gust Speed 20 mph    
Visibility 10 miles    
Events Rain    
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

Sep. 16, 2013 Rise Set
Actual Time 6:48 AM PDT 7:18 PM PDT
Civil Twilight 6:17 AM PDT 7:49 PM PDT
Nautical Twilight 5:40 AM PDT 8:25 PM PDT
Astronomical Twilight 5:02 AM PDT 9:03 PM PDT
Moon 5:38 PM PDT (9/16) 3:30 AM PDT (9/16)
Length of Visible Light 13h 31m
Length of Day
12h 30m
Waxing Gibbous, 91% of the Moon is Illuminated
Sep 16
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
12:13 AM 62.6 °F 57.2 °F 82% 29.83 in 10.0 mi South 6.9 mph - N/A   Overcast
12:47 AM 62.6 °F 57.2 °F 82% 29.83 in 10.0 mi South 9.2 mph - N/A   Mostly Cloudy
12:53 AM 62.1 °F 57.0 °F 84% 29.85 in 10.0 mi South 9.2 mph - N/A   Mostly Cloudy
1:46 AM 62.6 °F 57.2 °F 82% 29.85 in 10.0 mi South 10.4 mph - N/A   Mostly Cloudy
1:53 AM 62.1 °F 57.0 °F 84% 29.87 in 10.0 mi SSW 10.4 mph - N/A   Overcast
2:53 AM 61.0 °F 55.9 °F 83% 29.88 in 10.0 mi SSW 9.2 mph - N/A   Mostly Cloudy
3:22 AM 60.8 °F 55.4 °F 82% 29.88 in 10.0 mi SSW 8.1 mph - N/A   Mostly Cloudy
3:53 AM 60.1 °F 55.9 °F 86% 29.90 in 10.0 mi South 6.9 mph - N/A   Scattered Clouds
4:53 AM 60.1 °F 55.9 °F 86% 29.90 in 10.0 mi South 8.1 mph - N/A   Scattered Clouds
5:53 AM 60.1 °F 55.9 °F 86% 29.91 in 10.0 mi South 6.9 mph - N/A   Mostly Cloudy
6:45 AM 60.8 °F 55.4 °F 82% 29.90 in 10.0 mi South 5.8 mph - N/A   Mostly Cloudy
6:53 AM 61.0 °F 55.9 °F 83% 29.92 in 10.0 mi South 6.9 mph - N/A   Mostly Cloudy
7:53 AM 62.1 °F 55.9 °F 80% 29.93 in 10.0 mi South 6.9 mph - N/A   Mostly Cloudy
8:53 AM 62.1 °F 57.0 °F 84% 29.94 in 10.0 mi South 10.4 mph - 0.00 in   Mostly Cloudy
9:32 AM 62.6 °F 57.2 °F 82% 29.92 in 3.0 mi South 8.1 mph - 0.00 in Rain Light Rain
9:35 AM 60.8 °F 57.2 °F 88% 29.92 in 2.5 mi South 8.1 mph - 0.00 in Rain Light Rain
9:53 AM 62.1 °F 57.9 °F 86% 29.94 in 8.0 mi South 6.9 mph - 0.01 in   Overcast
10:31 AM 62.6 °F 57.2 °F 82% 29.93 in 10.0 mi South 6.9 mph - N/A   Overcast
10:53 AM 63.0 °F 57.0 °F 81% 29.95 in 10.0 mi South 10.4 mph - N/A   Overcast
11:19 AM 62.6 °F 57.2 °F 82% 29.93 in 8.0 mi SSW 9.2 mph - 0.00 in   Overcast
11:41 AM 64.4 °F 57.2 °F 77% 29.93 in 10.0 mi South 12.7 mph - 0.00 in   Mostly Cloudy
11:53 AM 64.0 °F 57.9 °F 80% 29.95 in 10.0 mi SSW 12.7 mph - 0.00 in   Mostly Cloudy
12:53 PM 66.0 °F 57.0 °F 73% 29.96 in 10.0 mi South 6.9 mph - N/A   Mostly Cloudy
1:45 PM 66.2 °F 57.2 °F 73% 29.95 in 10.0 mi South 8.1 mph - N/A   Mostly Cloudy
1:53 PM 66.9 °F 57.0 °F 70% 29.96 in 10.0 mi South 8.1 mph - N/A   Mostly Cloudy
2:10 PM 69.8 °F 57.2 °F 64% 29.94 in 10.0 mi SSW 5.8 mph 16.1 mph N/A   Mostly Cloudy
2:53 PM 71.1 °F 55.9 °F 59% 29.95 in 10.0 mi SW 11.5 mph - N/A   Mostly Cloudy
3:53 PM 70.0 °F 55.9 °F 61% 29.95 in 10.0 mi South 12.7 mph - N/A   Mostly Cloudy
4:53 PM 69.1 °F 55.0 °F 61% 29.94 in 10.0 mi SSW 12.7 mph - N/A   Mostly Cloudy
5:53 PM 66.0 °F 55.9 °F 70% 29.95 in 10.0 mi NW 3.5 mph - N/A   Mostly Cloudy
6:34 PM 64.4 °F 55.4 °F 73% 29.94 in 10.0 mi North 8.1 mph - N/A   Mostly Cloudy
6:53 PM 64.0 °F 55.0 °F 73% 29.96 in 10.0 mi NNE 10.4 mph - N/A   Mostly Cloudy
7:53 PM 63.0 °F 54.0 °F 72% 29.96 in 10.0 mi NNE 13.8 mph - N/A   Mostly Cloudy
8:53 PM 62.1 °F 53.1 °F 72% 29.96 in 10.0 mi NNE 12.7 mph - N/A   Overcast
9:26 PM 62.6 °F 51.8 °F 68% 29.95 in 10.0 mi NNE 12.7 mph - N/A   Overcast
9:53 PM 62.1 °F 51.1 °F 67% 29.96 in 10.0 mi NE 11.5 mph - N/A   Overcast
10:53 PM 62.1 °F 50.0 °F 65% 29.96 in 10.0 mi NNE 12.7 mph - N/A   Overcast
11:53 PM 61.0 °F 50.0 °F 67% 29.96 in 10.0 mi NNE 10.4 mph - N/A   Overcast