Seattle, WA

2:24 AM PDT on October 16, 2019 (GMT -0700)
Seattle-Tacoma International

Weather History for KSEA - September, 2019

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Wednesday, September 18, 2019

  Actual Average Record
Temperature  
Mean Temperature 62 °F 61 °F  
Max Temperature 68 °F 70 °F 85 °F (1991)
Min Temperature 55 °F 52 °F 38 °F (1947)
Degree Days  
Heating Degree Days 3 5  
Month to date heating degree days 22 56  
Since 1 July heating degree days 35 141  
Cooling Degree Days 0 1  
Month to date cooling degree days 32 18  
Year to date cooling degree days 323 186  
Growing Degree Days 12 (Base 50)    
Moisture  
Dew Point 52 °F    
Average Humidity 73    
Maximum Humidity 93    
Minimum Humidity 52    
Precipitation  
Precipitation 0.10 in 0.05 in 0.78 in (2010)
Month to date precipitation 2.49 0.78  
Year to date precipitation 19.71 21.37  
Sea Level Pressure  
Sea Level Pressure 29.88 in    
Wind  
Wind Speed 6 mph (NNW)    
Max Wind Speed 14 mph    
Max Gust Speed 19 mph    
Visibility 9 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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Astronomy

Sep. 18, 2019 Rise Set
Actual Time 6:50 AM PDT 7:15 PM PDT
Civil Twilight 6:19 AM PDT 7:46 PM PDT
Nautical Twilight 5:43 AM PDT 8:22 PM PDT
Astronomical Twilight 5:05 AM PDT 9:00 PM PDT
Moon 9:35 PM PDT (9/18) 11:14 AM PDT (9/18)
Length of Visible Light 13h 26m
Length of Day
12h 24m
Waning Gibbous, 82% of the Moon is Illuminated
Sep 18
Waning Gibbous
Sep 21
Last Quarter
Sep 28
New
Oct 5
First Quarter
Oct 13
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 55.9 °F 53.1 °F 90% 29.78 in 4.0 mi Calm Calm - 0.14 in Rain Rain
1:14 AM 55.9 °F 54.0 °F 93% 29.77 in 4.0 mi Calm Calm - 0.05 in Rain Rain
1:23 AM 55.9 °F 53.1 °F 90% 29.77 in 4.0 mi Calm Calm - 0.05 in Rain Light Rain
1:53 AM 57.0 °F 53.1 °F 87% 29.79 in 10.0 mi East 4.6 mph - 0.06 in Rain Light Rain
2:53 AM 55.9 °F 53.1 °F 90% 29.80 in 10.0 mi SSE 4.6 mph - 0.00 in   Overcast
3:53 AM 55.9 °F 54.0 °F 93% 29.80 in 5.0 mi SE 5.8 mph - 0.02 in Rain Light Rain
4:53 AM 55.9 °F 53.1 °F 90% 29.81 in 10.0 mi ESE 3.5 mph - 0.04 in   Overcast
5:44 AM 55.9 °F 53.1 °F 90% 29.80 in 7.0 mi Calm Calm - 0.00 in   Overcast
5:53 AM 55.9 °F 54.0 °F 93% 29.82 in 10.0 mi Calm Calm - 0.00 in   Overcast
6:44 AM 55.9 °F 53.1 °F 90% 29.81 in 10.0 mi Calm Calm - N/A   Overcast
6:53 AM 55.9 °F 53.1 °F 90% 29.84 in 8.0 mi WNW 3.5 mph - N/A   Overcast
7:03 AM 55.9 °F 53.1 °F 90% 29.82 in 7.0 mi Calm Calm - N/A   Overcast
7:53 AM 57.0 °F 54.0 °F 89% 29.86 in 10.0 mi NNW 4.6 mph - N/A   Mostly Cloudy
8:35 AM 57.0 °F 53.1 °F 87% 29.85 in 10.0 mi WSW 5.8 mph - N/A   Mostly Cloudy
8:53 AM 57.9 °F 54.0 °F 87% 29.87 in 10.0 mi WNW 4.6 mph - N/A   Mostly Cloudy
9:53 AM 57.9 °F 54.0 °F 87% 29.88 in 10.0 mi WNW 4.6 mph - N/A   Mostly Cloudy
10:53 AM 61.0 °F 53.1 °F 75% 29.89 in 10.0 mi Calm Calm - N/A   Scattered Clouds
11:18 AM 62.1 °F 54.0 °F 75% 29.88 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
11:53 AM 62.1 °F 52.0 °F 70% 29.90 in 10.0 mi WNW 4.6 mph - N/A   Mostly Cloudy
12:53 PM 64.9 °F 53.1 °F 65% 29.90 in 10.0 mi Variable 3.5 mph - N/A   Scattered Clouds
1:53 PM 66.0 °F 53.1 °F 63% 29.91 in 10.0 mi WNW 8.1 mph - N/A   Scattered Clouds
2:53 PM 66.0 °F 50.0 °F 56% 29.91 in 10.0 mi NW 9.2 mph - N/A   Scattered Clouds
3:53 PM 66.9 °F 51.1 °F 57% 29.92 in 10.0 mi North 9.2 mph - N/A   Scattered Clouds
4:53 PM 66.9 °F 48.9 °F 52% 29.94 in 10.0 mi North 12.7 mph - N/A   Scattered Clouds
5:53 PM 66.0 °F 51.1 °F 59% 29.95 in 10.0 mi North 9.2 mph - N/A   Scattered Clouds
6:53 PM 63.0 °F 51.1 °F 65% 29.96 in 10.0 mi NNW 8.1 mph - N/A   Scattered Clouds
7:53 PM 60.1 °F 51.1 °F 72% 29.98 in 10.0 mi North 10.4 mph - N/A   Partly Cloudy
8:53 PM 59.0 °F 51.1 °F 75% 29.99 in 10.0 mi North 8.1 mph - N/A   Clear
9:53 PM 60.1 °F 50.0 °F 69% 30.00 in 10.0 mi NNE 5.8 mph - N/A   Partly Cloudy
10:53 PM 59.0 °F 50.0 °F 72% 30.01 in 10.0 mi North 4.6 mph - N/A   Partly Cloudy
11:53 PM 57.9 °F 50.0 °F 75% 30.02 in 10.0 mi NNE 3.5 mph - N/A   Clear