Seattle, WA

6:58 PM PDT on May 25, 2017 (GMT -0700)
Seattle-Tacoma International

Weather History for KSEA - December, 2012

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Saturday, December 22, 2012

  Actual Average Record
Temperature  
Mean Temperature 43 °F 40 °F  
Max Temperature 47 °F 45 °F 57 °F (2005)
Min Temperature 39 °F 35 °F 14 °F (1983)
Degree Days  
Heating Degree Days 22 25  
Month to date heating degree days 497 535  
Since 1 July heating degree days 1524 1718  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 177 189  
Moisture  
Dew Point 36 °F    
Average Humidity 75    
Maximum Humidity 89    
Minimum Humidity 60    
Precipitation  
Precipitation 0.13 in 0.17 in 1.28 in (1964)
Month to date precipitation 5.65 3.86  
Year to date precipitation 47.06 36.00  
Snow  
Snow 0.00 in - 2.20 in (1968)
Month to date snowfall 0.6  
Since 1 July snowfall 0.6  
Snow Depth 0.00 in    
Sea Level Pressure  
Sea Level Pressure 29.61 in    
Wind  
Wind Speed 8 mph (SSE)    
Max Wind Speed 25 mph    
Max Gust Speed 35 mph    
Visibility 9 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. 22, 2012 Rise Set
Actual Time 7:54 AM PST 4:21 PM PST
Civil Twilight 7:18 AM PST 4:57 PM PST
Nautical Twilight 6:39 AM PST 5:36 PM PST
Astronomical Twilight 6:02 AM PST 6:14 PM PST
Moon 12:53 PM PST (12/22) 2:32 AM PST (12/22)
Length of Visible Light 9h 38m
Length of Day
8h 26m
Waxing Gibbous, 74% of the Moon is Illuminated
Dec 22
Waxing Gibbous
Dec 28
Full
Jan 4
Last Quarter
Jan 11
New
Jan 18
First Quarter

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 39.9 °F 36.7 °F 35.1 °F 83% 29.66 in 10.0 mi ENE 4.6 mph - N/A   Mostly Cloudy
1:53 AM 39.0 °F 33.4 °F 35.1 °F 86% 29.65 in 10.0 mi ENE 8.1 mph - N/A   Mostly Cloudy
2:53 AM 42.1 °F 36.6 °F 34.0 °F 73% 29.61 in 10.0 mi East 9.2 mph - N/A   Mostly Cloudy
3:53 AM 41.0 °F 39.0 °F 34.0 °F 76% 29.59 in 10.0 mi NE 3.5 mph - N/A   Overcast
4:53 AM 44.1 °F 40.1 °F 33.1 °F 65% 29.56 in 10.0 mi East 6.9 mph - N/A   Mostly Cloudy
5:53 AM 39.9 °F 36.7 °F 35.1 °F 83% 29.55 in 10.0 mi NW 4.6 mph - N/A   Overcast
6:53 AM 44.1 °F 39.0 °F 34.0 °F 68% 29.54 in 10.0 mi East 9.2 mph - 0.01 in Rain Light Rain
7:53 AM 44.1 °F 40.1 °F 35.1 °F 71% 29.52 in 10.0 mi ESE 6.9 mph - 0.02 in Rain Light Rain
8:53 AM 42.1 °F - 37.9 °F 85% 29.53 in 10.0 mi Calm Calm - 0.03 in Rain Light Rain
9:43 AM 42.8 °F 40.1 °F 39.2 °F 87% 29.52 in 8.0 mi WSW 4.6 mph - 0.02 in Rain Light Rain
9:53 AM 42.1 °F 37.7 °F 39.0 °F 89% 29.56 in 1.5 mi SSW 6.9 mph - 0.02 in Rain Light Rain
10:02 AM 42.8 °F 40.1 °F 39.2 °F 87% 29.54 in 6.0 mi SW 4.6 mph - 0.01 in Rain Light Rain
10:53 AM 42.1 °F 40.2 °F 39.9 °F 92% 29.56 in 7.0 mi SSE 3.5 mph - 0.02 in   Overcast
11:53 AM 43.0 °F 40.3 °F 39.0 °F 86% 29.57 in 10.0 mi SSE 4.6 mph - N/A   Mostly Cloudy
12:53 PM 46.0 °F 42.5 °F 39.0 °F 76% 29.56 in 10.0 mi South 6.9 mph - N/A   Mostly Cloudy
1:53 PM 46.0 °F 41.4 °F 37.9 °F 73% 29.56 in 10.0 mi South 9.2 mph - 0.00 in Rain Light Rain
2:53 PM 46.0 °F 41.4 °F 37.0 °F 71% 29.57 in 10.0 mi South 9.2 mph - 0.00 in   Mostly Cloudy
3:53 PM 46.0 °F 39.0 °F 34.0 °F 63% 29.60 in 10.0 mi South 17.3 mph 28.8 mph N/A   Overcast
4:53 PM 43.0 °F 36.4 °F 36.0 °F 76% 29.64 in 10.0 mi South 12.7 mph 21.9 mph 0.01 in   Mostly Cloudy
5:53 PM 43.0 °F 37.7 °F 34.0 °F 71% 29.65 in 10.0 mi South 9.2 mph - N/A   Mostly Cloudy
6:53 PM 43.0 °F 37.2 °F 33.1 °F 68% 29.67 in 10.0 mi SSE 10.4 mph - N/A   Mostly Cloudy
7:53 PM 44.1 °F 37.7 °F 35.1 °F 71% 29.70 in 10.0 mi SSW 12.7 mph - 0.00 in Rain Light Rain
8:53 PM 43.0 °F 38.8 °F 35.1 °F 74% 29.72 in 10.0 mi South 6.9 mph - 0.00 in Rain Light Rain
9:53 PM 42.1 °F 36.6 °F 36.0 °F 79% 29.73 in 10.0 mi South 9.2 mph - 0.02 in Rain Light Rain
10:53 PM 41.0 °F 35.2 °F 35.1 °F 79% 29.75 in 10.0 mi South 9.2 mph - 0.00 in   Mostly Cloudy
11:53 PM 39.9 °F 35.1 °F 34.0 °F 79% 29.76 in 10.0 mi SSW 6.9 mph - N/A   Mostly Cloudy