Weather History for KSJC - December, 2012

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Monday, December 24, 2012

  Actual Average Record
Temperature  
Mean Temperature 50 °F 51 °F  
Max Temperature 56 °F 60 °F 72 °F (1901)
Min Temperature 43 °F 42 °F 23 °F (1990)
Degree Days  
Heating Degree Days 15 14  
Month to date heating degree days 302 314  
Since 1 July heating degree days 557 639  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 483 730  
Moisture  
Dew Point 43 °F    
Average Humidity 83    
Maximum Humidity 100    
Minimum Humidity 66    
Precipitation  
Precipitation 0.00 in 0.09 in 1.66 in (1979)
Month to date precipitation 3.41 1.56  
Year to date precipitation 11.90 14.34  
Since 1 July precipitation 6.36 4.45  
Sea Level Pressure  
Sea Level Pressure 30.13 in    
Wind  
Wind Speed 3 mph (WSW)    
Max Wind Speed 12 mph    
Max Gust Speed 15 mph    
Visibility 8 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Astronomy

Dec. 24, 2012 Rise Set
Actual Time 7:19 AM PST 4:55 PM PST
Civil Twilight 6:50 AM PST 5:24 PM PST
Nautical Twilight 6:17 AM PST 5:57 PM PST
Astronomical Twilight 5:46 AM PST 6:29 PM PST
Moon 2:24 PM PST (12/24) 4:04 AM PST (12/24)
Length of Visible Light 10h 34m
Length of Day
9h 35m
Waxing Gibbous, 89% of the Moon is Illuminated
Dec 24
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
12:27 AM 46.4 °F - 46.4 °F 100% 30.05 in 1.5 mi Calm Calm - N/A   Clear
12:53 AM 46.0 °F - - N/A% 30.05 in 1.5 mi Calm Calm - N/A   Clear
1:06 AM 44.6 °F - - N/A% 30.06 in 2.0 mi Calm Calm - N/A   Partly Cloudy
1:21 AM 44.6 °F 43.1 °F 44.6 °F 100% 30.07 in 6.0 mi SSE 3.5 mph - N/A   Clear
1:53 AM 45.0 °F - 45.0 °F 100% 30.08 in 7.0 mi Calm Calm - N/A   Clear
2:14 AM 44.6 °F - 44.6 °F 100% 30.08 in 1.8 mi Calm Calm - N/A   Mostly Cloudy
2:26 AM 44.6 °F - 44.6 °F 100% 30.09 in 2.0 mi Calm Calm - N/A   Scattered Clouds
2:34 AM 44.6 °F - 44.6 °F 100% 30.09 in 4.0 mi Calm Calm - N/A   Scattered Clouds
2:53 AM 43.0 °F - 43.0 °F 100% 30.09 in 4.0 mi Calm Calm - N/A   Mostly Cloudy
3:28 AM 44.6 °F 40.7 °F 44.6 °F 100% 30.08 in 10.0 mi South 6.9 mph - N/A   Scattered Clouds
3:48 AM 44.6 °F - 44.6 °F 100% 30.09 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
3:53 AM 45.0 °F - 45.0 °F 100% 30.09 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
4:13 AM 44.6 °F 42.2 °F 42.8 °F 93% 30.08 in 10.0 mi South 4.6 mph - N/A   Scattered Clouds
4:53 AM 44.1 °F - 43.0 °F 96% 30.10 in 10.0 mi Calm Calm - N/A   Scattered Clouds
5:20 AM 44.6 °F - 42.8 °F 93% 30.11 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
5:34 AM 44.6 °F - 42.8 °F 93% 30.12 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
5:53 AM 44.1 °F - 43.0 °F 96% 30.13 in 10.0 mi Calm Calm - N/A   Overcast
6:53 AM 43.0 °F - 42.1 °F 97% 30.17 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
7:18 AM 42.8 °F - 42.8 °F 100% 30.18 in 10.0 mi Calm Calm - N/A   Overcast
7:49 AM 44.6 °F - 42.8 °F 93% 30.18 in 10.0 mi Calm Calm - N/A   Scattered Clouds
7:53 AM 44.1 °F - 43.0 °F 96% 30.18 in 10.0 mi Calm Calm - N/A   Partly Cloudy
8:53 AM 48.0 °F - 46.0 °F 93% 30.19 in 10.0 mi Calm Calm - N/A   Clear
9:53 AM 51.1 °F - 46.9 °F 86% 30.21 in 10.0 mi Calm Calm - N/A   Clear
10:53 AM 53.1 °F - 44.1 °F 71% 30.20 in 10.0 mi WNW 8.1 mph - N/A   Clear
11:53 AM 54.0 °F - 44.1 °F 69% 30.18 in 10.0 mi WNW 5.8 mph - N/A   Clear
12:53 PM 55.0 °F - 44.1 °F 67% 30.17 in 10.0 mi NW 6.9 mph - N/A   Clear
1:53 PM 55.9 °F - 44.1 °F 64% 30.16 in 10.0 mi WNW 9.2 mph - N/A   Clear
2:53 PM 55.0 °F - 44.1 °F 67% 30.15 in 10.0 mi WNW 8.1 mph - N/A   Clear
3:53 PM 54.0 °F - 43.0 °F 66% 30.15 in 10.0 mi West 8.1 mph - N/A   Clear
4:53 PM 52.0 °F - 42.1 °F 69% 30.15 in 10.0 mi WNW 10.4 mph - N/A   Clear
5:53 PM 50.0 °F - 42.1 °F 74% 30.14 in 10.0 mi WNW 4.6 mph - N/A   Clear
6:53 PM 48.0 °F - 39.0 °F 71% 30.15 in 10.0 mi Calm Calm - N/A   Clear
7:53 PM 48.9 °F - 41.0 °F 74% 30.16 in 10.0 mi SSW 4.6 mph - N/A   Clear
8:53 PM 48.9 °F - 41.0 °F 74% 30.15 in 10.0 mi WSW 4.6 mph - N/A   Clear
9:53 PM 46.9 °F - 41.0 °F 80% 30.16 in 10.0 mi Calm Calm - N/A   Clear
10:53 PM 44.1 °F 42.5 °F 41.0 °F 89% 30.17 in 10.0 mi ESE 3.5 mph - N/A   Clear
11:53 PM 44.1 °F 42.5 °F 39.9 °F 85% 30.17 in 10.0 mi SSE 3.5 mph - N/A   Clear