Seatac, WA

11:51 AM PST on February 14, 2016 (GMT -0800)
Seattle-Tacoma International

Weather History for KSEA - December, 2014

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Tuesday, December 23, 2014

  Actual Average Record
Temperature  
Mean Temperature 48 °F 40 °F  
Max Temperature 54 °F 45 °F 58 °F (1950)
Min Temperature 41 °F 35 °F 9 °F (1983)
Degree Days  
Heating Degree Days 17 25  
Month to date heating degree days 396 560  
Since 1 July heating degree days 1236 1743  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 369 189  
Moisture  
Dew Point 42 °F    
Average Humidity 82    
Maximum Humidity 93    
Minimum Humidity 70    
Precipitation  
Precipitation 0.81 in 0.17 in 1.14 in (1949)
Month to date precipitation 4.29 4.03  
Year to date precipitation 48.00 36.17  
Snow  
Snow 0.00 in - 8.90 in (1965)
Month to date snowfall 0.0  
Since 1 July snowfall 0.8  
Snow Depth 0.00 in    
Sea Level Pressure  
Sea Level Pressure 30.18 in    
Wind  
Wind Speed 9 mph (SE)    
Max Wind Speed 23 mph    
Max Gust Speed 28 mph    
Visibility 8 miles    
Events Rain    
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

Dec. 23, 2014 Rise Set
Actual Time 7:54 AM PST 4:21 PM PST
Civil Twilight 7:19 AM PST 4:57 PM PST
Nautical Twilight 6:39 AM PST 5:37 PM PST
Astronomical Twilight 6:02 AM PST 6:14 PM PST
Moon 8:56 AM PST (12/23) 6:52 PM PST (12/23)
Length of Visible Light 9h 38m
Length of Day
8h 27m
Waxing Crescent, 4% of the Moon is Illuminated
Dec 23
Waxing Crescent
Dec 28
First Quarter
Jan 4
Full
Jan 13
Last Quarter
Jan 20
New

Hourly Weather History & Observations

Time (PST) Temp. Windchill Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:53 AM 45.0 °F 42.6 °F 36.0 °F 71% 30.33 in 10.0 mi East 4.6 mph - N/A   Overcast
1:53 AM 44.1 °F 42.5 °F 37.0 °F 76% 30.33 in 10.0 mi South 3.5 mph - N/A   Overcast
2:53 AM 44.1 °F - 37.0 °F 76% 30.33 in 10.0 mi Calm Calm - N/A   Overcast
3:53 AM 45.0 °F 40.6 °F 35.1 °F 68% 30.28 in 10.0 mi SE 8.1 mph - N/A   Overcast
4:53 AM 44.1 °F 41.5 °F 36.0 °F 73% 30.28 in 10.0 mi SSE 4.6 mph - N/A   Overcast
5:53 AM 46.0 °F - 37.0 °F 71% 30.27 in 10.0 mi Calm Calm - N/A   Overcast
6:43 AM 44.6 °F 41.4 °F 37.4 °F 76% 30.24 in 10.0 mi SE 5.8 mph - N/A   Overcast
6:53 AM 45.0 °F 41.2 °F 37.0 °F 74% 30.26 in 10.0 mi SE 6.9 mph - N/A   Overcast
7:53 AM 45.0 °F 43.5 °F 37.0 °F 74% 30.25 in 8.0 mi SSE 3.5 mph - 0.00 in Rain Light Rain
8:53 AM 44.1 °F 40.1 °F 39.0 °F 82% 30.25 in 10.0 mi SSE 6.9 mph - 0.02 in   Overcast
9:53 AM 45.0 °F 39.3 °F 39.0 °F 80% 30.25 in 6.0 mi SSE 11.5 mph - 0.00 in   Light Drizzle
10:03 AM 44.6 °F 38.4 °F 39.2 °F 81% 30.21 in 6.0 mi SE 12.7 mph - 0.00 in Rain Light Rain
10:30 AM 46.4 °F 40.7 °F 41.0 °F 81% 30.21 in 10.0 mi SSE 12.7 mph - 0.01 in   Overcast
10:44 AM 46.4 °F 41.9 °F 42.8 °F 87% 30.21 in 10.0 mi SSE 9.2 mph - 0.01 in   Overcast
10:53 AM 46.9 °F - 43.0 °F 86% 30.23 in 10.0 mi South 6.9 mph - 0.01 in   Overcast
11:16 AM 48.2 °F - 44.6 °F 87% 30.18 in 10.0 mi SSE 10.4 mph - N/A   Overcast
11:22 AM 48.2 °F - 46.4 °F 93% 30.18 in 10.0 mi SSE 8.1 mph - 0.00 in Rain Light Rain
11:53 AM 50.0 °F - 48.0 °F 93% 30.19 in 10.0 mi SSW 5.8 mph - 0.00 in   Overcast
12:09 PM 51.8 °F - 48.2 °F 88% 30.16 in 10.0 mi SSW 8.1 mph - N/A   Overcast
12:22 PM 51.8 °F - 48.2 °F 88% 30.16 in 10.0 mi SSW 5.8 mph - N/A   Mostly Cloudy
12:53 PM 51.1 °F - 48.9 °F 92% 30.17 in 10.0 mi South 8.1 mph - N/A   Overcast
1:53 PM 53.1 °F - 48.9 °F 86% 30.14 in 10.0 mi South 12.7 mph - N/A   Overcast
2:32 PM 53.6 °F - 48.2 °F 82% 30.11 in 10.0 mi South 10.4 mph - N/A   Overcast
2:53 PM 53.1 °F - 48.9 °F 86% 30.13 in 7.0 mi South 9.2 mph - N/A   Overcast
3:53 PM 53.1 °F - 50.0 °F 89% 30.12 in 4.0 mi South 9.2 mph - 0.02 in Rain Light Rain
4:29 PM 53.6 °F - 50.0 °F 88% 30.11 in 3.0 mi NNW 12.7 mph 19.6 mph 0.01 in Rain Rain
4:37 PM 48.2 °F - 46.4 °F 93% 30.11 in 2.0 mi NE 11.5 mph 21.9 mph 0.05 in Rain Heavy Rain
4:53 PM 48.0 °F - 45.0 °F 89% 30.13 in 2.5 mi NNE 13.8 mph - 0.10 in Rain Rain
5:43 PM 46.4 °F 39.8 °F 44.6 °F 93% 30.09 in 3.0 mi NE 16.1 mph - 0.15 in Rain Light Rain
5:53 PM 46.9 °F - 44.1 °F 90% 30.11 in 3.0 mi NE 20.7 mph 26.5 mph 0.16 in Rain Light Rain
6:53 PM 46.0 °F 40.6 °F 43.0 °F 89% 30.12 in 3.0 mi NE 11.5 mph - 0.11 in Rain Rain
7:53 PM 45.0 °F 37.9 °F 41.0 °F 86% 30.12 in 7.0 mi NE 16.1 mph 25.3 mph 0.09 in Rain Light Rain
8:53 PM 44.1 °F 37.4 °F 39.9 °F 85% 30.14 in 7.0 mi ENE 13.8 mph - 0.07 in Rain Light Rain
9:10 PM 42.8 °F 35.8 °F 39.2 °F 87% 30.10 in 7.0 mi ENE 13.8 mph - 0.03 in Rain Light Rain
9:42 PM 42.8 °F 37.0 °F 39.2 °F 87% 30.10 in 8.0 mi East 10.4 mph - 0.08 in Rain Light Rain
9:53 PM 42.1 °F 34.9 °F 37.9 °F 85% 30.12 in 7.0 mi East 13.8 mph - 0.10 in Rain Light Rain
10:53 PM 41.0 °F 35.2 °F 37.0 °F 86% 30.11 in 8.0 mi East 9.2 mph - 0.05 in Rain Light Rain
11:53 PM 41.0 °F 36.4 °F 37.9 °F 89% 30.09 in 6.0 mi ESE 6.9 mph - 0.07 in Rain Light Rain