Weather History for KOAK - December, 2011

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Thursday, December 15, 2011

  Actual Average Record
Temperature  
Mean Temperature 48 °F 49 °F  
Max Temperature 56 °F 56 °F 70 °F (1998)
Min Temperature 39 °F 41 °F 33 °F (1975)
Degree Days  
Heating Degree Days 17 16  
Month to date heating degree days 213 231  
Since 1 July heating degree days 830 906  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 152 138  
Moisture  
Dew Point 45 °F    
Average Humidity 83    
Maximum Humidity 100    
Minimum Humidity 66    
Precipitation  
Precipitation 0.07 in 0.13 in 1.18 in (1957)
Month to date precipitation 0.10 1.58  
Year to date precipitation 15.87 18.73  
Since 1 July precipitation 3.06 5.51  
Sea Level Pressure  
Sea Level Pressure 30.24 in    
Wind  
Wind Speed 6 mph (ENE)    
Max Wind Speed 21 mph    
Max Gust Speed -    
Visibility 9 miles    
Events Rain    
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Date:

Astronomy

Dec. 15, 2011 Rise Set
Actual Time 7:16 AM PST 4:51 PM PST
Civil Twilight 6:47 AM PST 5:20 PM PST
Nautical Twilight 6:14 AM PST 5:53 PM PST
Astronomical Twilight 5:42 AM PST 6:25 PM PST
Moon 10:18 PM PST (12/15) 10:40 AM PST (12/15)
Length of Visible Light 10h 33m
Length of Day
9h 34m
Waning Gibbous, 73% of the Moon is Illuminated
Dec 15
Waning Gibbous
Dec 17
Last Quarter
Dec 24
New
Dec 31
First Quarter
Jan 8
Full

Hourly Weather History & Observations

Time (PST) Temp. Windchill Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:10 AM 46.4 °F - 46.4 °F 100% 30.31 in 8.0 mi Calm Calm - N/A   Overcast
12:39 AM 46.4 °F 42.9 °F 46.4 °F 100% 30.26 in 9.0 mi SE 6.9 mph - N/A   Scattered Clouds
12:53 AM 46.0 °F - 46.0 °F 100% 30.27 in 9.0 mi Calm Calm - N/A   Mostly Cloudy
1:53 AM 46.0 °F 42.5 °F 46.0 °F 100% 30.25 in 10.0 mi SE 6.9 mph - N/A   Mostly Cloudy
2:53 AM 46.9 °F - 46.9 °F 100% 30.23 in 9.0 mi SE 8.1 mph - 0.00 in Rain Light Rain
3:53 AM 46.4 °F 42.4 °F 46.4 °F 100% 30.22 in 4.0 mi SE 8.1 mph - N/A Rain Light Rain
4:00 AM 46.4 °F 41.9 °F 46.4 °F 100% 30.22 in 4.0 mi SE 9.2 mph - 0.00 in Rain Light Rain
4:53 AM 46.0 °F 41.4 °F 44.1 °F 93% 30.20 in 3.0 mi ESE 9.2 mph - 0.01 in Rain Light Rain
5:53 AM 46.4 °F 44.3 °F 44.6 °F 93% 30.22 in 7.0 mi East 4.6 mph - N/A Rain Light Rain
6:19 AM 46.4 °F 42.4 °F 44.6 °F 93% 30.22 in 8.0 mi East 8.1 mph - 0.00 in   Overcast
6:53 AM 46.4 °F 42.4 °F 44.6 °F 93% 30.22 in 7.0 mi ESE 8.1 mph - N/A   Overcast
7:53 AM 46.9 °F - 45.0 °F 93% 30.23 in 10.0 mi SE 8.1 mph - 0.00 in   Overcast
8:28 AM 46.4 °F 45.2 °F 44.6 °F 93% 30.25 in 10.0 mi NNE 3.5 mph - N/A   Overcast
8:39 AM 46.4 °F 44.3 °F 44.6 °F 93% 30.25 in 10.0 mi NE 4.6 mph - N/A   Overcast
8:53 AM 48.0 °F - 45.0 °F 89% 30.25 in 10.0 mi Calm Calm - N/A   Overcast
9:19 AM 48.2 °F - 46.4 °F 93% 30.26 in 10.0 mi NE 3.5 mph - N/A   Overcast
9:53 AM 48.9 °F - 46.0 °F 90% 30.27 in 10.0 mi NNE 4.6 mph - N/A   Overcast
10:53 AM 51.1 °F - 46.9 °F 86% 30.27 in 10.0 mi NE 8.1 mph - N/A   Overcast
11:53 AM 51.1 °F - 48.9 °F 92% 30.25 in 10.0 mi NE 16.1 mph - N/A   Mostly Cloudy
12:53 PM 53.1 °F - 46.9 °F 80% 30.23 in 10.0 mi North 8.1 mph - N/A   Scattered Clouds
1:53 PM 54.0 °F - 46.0 °F 75% 30.21 in 10.0 mi ENE 4.6 mph - N/A   Mostly Cloudy
2:53 PM 55.0 °F - 46.0 °F 72% 30.21 in 10.0 mi NNE 9.2 mph - N/A   Scattered Clouds
3:53 PM 55.0 °F - 44.1 °F 67% 30.22 in 10.0 mi NE 8.1 mph - N/A   Scattered Clouds
4:53 PM 50.0 °F - 45.0 °F 83% 30.22 in 10.0 mi NNE 4.6 mph - N/A   Scattered Clouds
5:53 PM 48.0 °F - 45.0 °F 89% 30.22 in 10.0 mi Calm Calm - N/A   Partly Cloudy
6:53 PM 48.0 °F - 46.9 °F 96% 30.22 in 10.0 mi Calm Calm - N/A   Clear
7:53 PM 44.6 °F 43.1 °F 44.6 °F 100% 30.24 in 10.0 mi ENE 3.5 mph - N/A   Partly Cloudy
8:53 PM 43.0 °F 41.3 °F 43.0 °F 100% 30.24 in 10.0 mi ESE 3.5 mph - N/A   Clear
9:53 PM 46.9 °F - 39.9 °F 77% 30.24 in 10.0 mi NE 3.5 mph - N/A   Clear
10:53 PM 39.9 °F 37.8 °F 39.9 °F 100% 30.25 in 10.0 mi East 3.5 mph - N/A   Clear
11:53 PM 39.9 °F 37.8 °F 39.9 °F 100% 30.25 in 10.0 mi ENE 3.5 mph - N/A   Clear