Weather History for Livermore, CA

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Monday, December 17, 2012

  Actual Average Record
Temperature  
Mean Temperature 50 °F 47 °F  
Max Temperature 57 °F 56 °F 74 °F (1958)
Min Temperature 43 °F 37 °F 22 °F (1965)
Degree Days  
Heating Degree Days 15 18  
Month to date heating degree days 234 296  
Since 1 July heating degree days 593 768  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 957 830  
Moisture  
Dew Point 48 °F    
Average Humidity 84    
Maximum Humidity 93    
Minimum Humidity 74    
Precipitation  
Precipitation 0.07 in 0.10 in 0.85 in (1977)
Month to date precipitation 2.25 1.22  
Year to date precipitation 13.31 14.25  
Since 1 July precipitation 6.25 4.35  
Sea Level Pressure  
Sea Level Pressure 30.01 in    
Wind  
Wind Speed 9 mph (SW)    
Max Wind Speed 18 mph    
Max Gust Speed 23 mph    
Visibility 9 miles    
Events Rain    
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Date:

Astronomy

Dec. 17, 2012 Rise Set
Actual Time 7:16 AM PST 4:50 PM PST
Civil Twilight 6:47 AM PST 5:19 PM PST
Nautical Twilight 6:14 AM PST 5:52 PM PST
Astronomical Twilight 5:42 AM PST 6:24 PM PST
Moon 10:33 AM PST (12/17) 10:12 PM PST (12/17)
Length of Visible Light 10h 32m
Length of Day
9h 33m
Waxing Crescent, 26% of the Moon is Illuminated
Dec 17
Waxing Crescent
Dec 19
First Quarter
Dec 28
Full
Jan 4
Last Quarter
Jan 11
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 55.0 °F - 48.9 °F 80% 30.02 in 10.0 mi SSW 10.4 mph 20.7 mph 0.00 in Rain Light Rain
1:53 AM 54.0 °F - 48.9 °F 83% 30.01 in 8.0 mi SSW 12.7 mph - 0.00 in Rain Light Rain
2:53 AM 54.0 °F - 48.9 °F 83% 30.00 in 10.0 mi SSW 12.7 mph - 0.01 in   Overcast
3:02 AM 55.4 °F - 48.2 °F 77% 30.00 in 10.0 mi SSW 13.8 mph - N/A   Overcast
3:15 AM 53.6 °F - 48.2 °F 82% 30.01 in 6.0 mi SSW 12.7 mph - 0.01 in   Haze
4:53 AM 53.1 °F - 50.0 °F 89% 30.00 in 9.0 mi SSW 10.4 mph - 0.02 in   Overcast
5:30 AM 53.6 °F - 50.0 °F 88% 30.00 in 7.0 mi SSW 11.5 mph - 0.00 in Rain Light Rain
5:53 AM 53.1 °F - 51.1 °F 93% 30.01 in 5.0 mi SSW 8.1 mph - 0.01 in Rain Light Rain
6:53 AM 53.1 °F - 51.1 °F 93% 30.02 in 3.0 mi SW 9.2 mph - 0.01 in Rain Light Rain
7:53 AM 54.0 °F - 51.1 °F 90% 30.02 in 10.0 mi SSW 6.9 mph - 0.00 in   Overcast
8:53 AM 55.0 °F - 53.1 °F 93% 30.03 in 5.0 mi SW 10.4 mph - N/A   Overcast
9:53 AM 54.0 °F - 53.1 °F 97% 30.06 in 3.0 mi West 11.5 mph - 0.01 in Rain Light Rain
10:53 AM 54.0 °F - 52.0 °F 93% 30.05 in 10.0 mi SW 5.8 mph - 0.00 in   Overcast
11:53 AM 55.0 °F - 51.1 °F 86% 30.03 in 10.0 mi SW 6.9 mph - 0.00 in   Overcast
12:53 PM 55.9 °F - 48.9 °F 77% 30.02 in 10.0 mi WSW 9.2 mph - N/A   Overcast
1:53 PM 55.9 °F - 48.9 °F 77% 29.99 in 10.0 mi WSW 8.1 mph - N/A   Overcast
4:53 PM 54.0 °F - 48.0 °F 80% 29.96 in 10.0 mi SW 8.1 mph - N/A   Mostly Cloudy
5:53 PM 53.1 °F - 46.0 °F 77% 29.98 in 10.0 mi WSW 9.2 mph - N/A   Overcast
6:53 PM 52.0 °F - 44.1 °F 74% 29.99 in 10.0 mi WSW 6.9 mph - N/A   Overcast
7:53 PM 51.1 °F - 44.1 °F 77% 29.99 in 10.0 mi WSW 9.2 mph - N/A   Overcast
8:53 PM 50.0 °F - 43.0 °F 77% 29.99 in 10.0 mi WSW 12.7 mph - N/A   Clear
9:53 PM 48.0 °F - 43.0 °F 83% 29.99 in 10.0 mi WSW 10.4 mph - N/A   Partly Cloudy
10:53 PM 46.0 °F 44.8 °F 41.0 °F 83% 29.99 in 10.0 mi West 3.5 mph - N/A   Clear
11:53 PM 43.0 °F 39.5 °F 39.9 °F 89% 29.99 in 10.0 mi West 5.8 mph - N/A   Clear