Seattle, WA

4:20 AM PDT on May 26, 2017 (GMT -0700)
Seattle-Tacoma International

Weather History for KSEA - September, 2012

Change the Weather History Date:

Wednesday, September 19, 2012

  Actual Average Record
Temperature  
Mean Temperature 64 °F 61 °F  
Max Temperature 75 °F 70 °F 82 °F (1999)
Min Temperature 53 °F 52 °F 40 °F (1957)
Degree Days  
Heating Degree Days 1 5  
Month to date heating degree days 35 61  
Since 1 July heating degree days 99 146  
Cooling Degree Days 0 1  
Month to date cooling degree days 27 19  
Year to date cooling degree days 176 187  
Growing Degree Days 13 (Base 50)    
Moisture  
Dew Point 52 °F    
Average Humidity 70    
Maximum Humidity 93    
Minimum Humidity 46    
Precipitation  
Precipitation 0.00 in 0.05 in 0.79 in (1959)
Month to date precipitation 0.02 0.83  
Year to date precipitation 26.41 21.42  
Sea Level Pressure  
Sea Level Pressure 30.14 in    
Wind  
Wind Speed 4 mph (WSW)    
Max Wind Speed 10 mph    
Max Gust Speed 13 mph    
Visibility 4 miles    
Events Fog    
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

Daily Weather History Graph

Daily Weather History Graph

Search for Another Location

Airport or City:

Trip Planner

Search our weather history database for the weather conditions in past years. The results will help you decide how hot, cold, wet, or windy it might be!

Date:

Astronomy

Sep. 19, 2012 Rise Set
Actual Time 6:52 AM PDT 7:11 PM PDT
Civil Twilight 6:22 AM PDT 7:42 PM PDT
Nautical Twilight 5:45 AM PDT 8:18 PM PDT
Astronomical Twilight 5:08 AM PDT 8:56 PM PDT
Moon 11:31 AM PDT (9/19) 9:02 PM PDT (9/19)
Length of Visible Light 13h 20m
Length of Day
12h 19m
Waxing Crescent, 18% of the Moon is Illuminated
Sep 19
Waxing Crescent
Sep 22
First Quarter
Sep 29
Full
Oct 8
Last Quarter
Oct 15
New

Hourly Weather History & Observations

Time (PDT) Temp. Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:53 AM 55.0 °F 51.1 °F 86% 30.13 in 10.0 mi SSW 6.9 mph - N/A   Partly Cloudy
1:44 AM 53.6 °F 51.8 °F 94% 30.12 in 10.0 mi SSW 6.9 mph - N/A   Mostly Cloudy
1:53 AM 54.0 °F 52.0 °F 93% 30.14 in 9.0 mi SSW 6.9 mph - N/A   Mostly Cloudy
2:04 AM 53.6 °F 51.8 °F 94% 30.12 in 0.8 mi SSW 6.9 mph - N/A   Mostly Cloudy
2:53 AM 54.0 °F 52.0 °F 93% 30.14 in 0.5 mi SW 6.9 mph - N/A Fog Fog
3:31 AM 53.6 °F 51.8 °F 94% 30.13 in 0.5 mi SSW 3.5 mph - N/A Fog Fog
3:44 AM 53.6 °F 51.8 °F 94% 30.13 in 0.5 mi South 4.6 mph - N/A Fog Fog
3:53 AM 53.1 °F 52.0 °F 96% 30.15 in 0.5 mi SSW 4.6 mph - N/A Fog Fog
4:18 AM 53.6 °F 51.8 °F 94% 30.14 in 0.2 mi SSW 4.6 mph - N/A Fog Fog
4:53 AM 53.1 °F 52.0 °F 96% 30.16 in 0.2 mi SSW 3.5 mph - N/A Fog Fog
5:08 AM 53.6 °F 51.8 °F 94% 30.15 in 0.2 mi SW 3.5 mph - N/A Fog Fog
5:19 AM 53.6 °F 51.8 °F 94% 30.15 in 0.2 mi SSW 4.6 mph - N/A Fog Fog
5:30 AM 53.6 °F 51.8 °F 94% 30.15 in 0.2 mi SSW 5.8 mph - N/A Fog Fog
5:53 AM 53.1 °F 52.0 °F 96% 30.17 in 0.2 mi SW 4.6 mph - N/A Fog Fog
6:53 AM 53.1 °F 52.0 °F 96% 30.17 in 0.2 mi SW 3.5 mph - N/A Fog Fog
7:14 AM 53.6 °F 51.8 °F 94% 30.16 in 0.2 mi Calm Calm - N/A Fog Fog
7:53 AM 53.1 °F 52.0 °F 96% 30.18 in 0.2 mi SW 3.5 mph - N/A Fog Fog
8:31 AM 53.6 °F 51.8 °F 94% 30.17 in 0.2 mi SW 3.5 mph - N/A Fog Fog
8:41 AM 53.6 °F 51.8 °F 94% 30.17 in 0.2 mi Calm Calm - N/A Fog Fog
8:53 AM 53.1 °F 52.0 °F 96% 30.19 in 0.2 mi SSE 4.6 mph - N/A Fog Fog
9:06 AM 53.6 °F 51.8 °F 94% 30.17 in 0.2 mi South 3.5 mph - N/A Fog Fog
9:42 AM 53.6 °F 51.8 °F 94% 30.17 in 0.2 mi Calm Calm - N/A Fog Fog
9:53 AM 54.0 °F 52.0 °F 93% 30.19 in 0.2 mi Calm Calm - N/A Fog Fog
10:53 AM 55.9 °F 52.0 °F 87% 30.19 in 2.5 mi Calm Calm - N/A   Overcast
11:09 AM 57.2 °F 53.6 °F 88% 30.17 in 2.5 mi WNW 4.6 mph - N/A   Haze
11:44 AM 60.8 °F 53.6 °F 77% 30.16 in 6.0 mi WNW 5.8 mph - N/A   Haze
11:53 AM 61.0 °F 53.1 °F 75% 30.18 in 6.0 mi West 4.6 mph - N/A   Haze
12:53 PM 61.0 °F 52.0 °F 72% 30.16 in 7.0 mi Variable 4.6 mph - N/A Fog Patches of Fog
1:53 PM 64.0 °F 53.1 °F 67% 30.15 in 7.0 mi West 6.9 mph - N/A   Clear
2:53 PM 70.0 °F 53.1 °F 55% 30.13 in 10.0 mi WNW 6.9 mph - N/A   Clear
3:53 PM 72.0 °F 54.0 °F 53% 30.12 in 10.0 mi NW 8.1 mph - N/A   Clear
4:53 PM 73.9 °F 52.0 °F 46% 30.10 in 10.0 mi WNW 5.8 mph - N/A   Clear
5:53 PM 71.6 °F 50.0 °F 46% 30.07 in 10.0 mi WNW 6.9 mph - N/A   Clear
6:53 PM 68.0 °F 50.0 °F 52% 30.09 in 10.0 mi NW 4.6 mph - N/A   Clear
7:53 PM 64.9 °F 48.0 °F 54% 30.09 in 10.0 mi North 4.6 mph - N/A   Partly Cloudy
8:53 PM 64.9 °F 48.9 °F 56% 30.10 in 10.0 mi North 4.6 mph - N/A   Partly Cloudy
9:53 PM 62.1 °F 48.9 °F 62% 30.10 in 10.0 mi North 6.9 mph - N/A   Clear
10:53 PM 61.0 °F 48.9 °F 64% 30.11 in 10.0 mi Calm Calm - N/A   Clear
11:53 PM 57.0 °F 48.9 °F 74% 30.11 in 10.0 mi Calm Calm - N/A   Clear