Weather History for Livermore, CA

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Tuesday, September 18, 2012

  Actual Average Record
Temperature  
Mean Temperature 66 °F 70 °F  
Max Temperature 78 °F 84 °F 103 °F (1939)
Min Temperature 53 °F 55 °F 41 °F (1965)
Degree Days  
Heating Degree Days 0 1  
Month to date heating degree days 0 1  
Since 1 July heating degree days 4 8  
Cooling Degree Days 1 5  
Month to date cooling degree days 105 112  
Year to date cooling degree days 802 737  
Growing Degree Days 15 (Base 50)    
Moisture  
Dew Point 48 °F    
Average Humidity 60    
Maximum Humidity 89    
Minimum Humidity 31    
Precipitation  
Precipitation 0.00 in 0.01 in 0.36 in (1959)
Month to date precipitation 0.00 0.07  
Year to date precipitation 7.06 9.98  
Since 1 July precipitation 0.00 0.08  
Sea Level Pressure  
Sea Level Pressure 30.05 in    
Wind  
Wind Speed 8 mph (WNW)    
Max Wind Speed 15 mph    
Max Gust Speed 18 mph    
Visibility 10 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Date:

Astronomy

Sep. 18, 2012 Rise Set
Actual Time 6:52 AM PDT 7:09 PM PDT
Civil Twilight 6:25 AM PDT 7:35 PM PDT
Nautical Twilight 5:55 AM PDT 8:06 PM PDT
Astronomical Twilight 5:23 AM PDT 8:37 PM PDT
Moon 9:53 AM PDT (9/18) 8:41 PM PDT (9/18)
Length of Visible Light 13h 09m
Length of Day
12h 17m
Waxing Crescent, 10% of the Moon is Illuminated
Sep 18
Waxing Crescent
Sep 22
First Quarter
Sep 29
Full
Oct 8
Last Quarter
Oct 15
New

Hourly Weather History & Observations

Time (PDT) Temp. Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:53 AM 54.0 °F 48.9 °F 83% 30.04 in 10.0 mi WNW 8.1 mph - N/A   Clear
1:53 AM 54.0 °F 50.0 °F 86% 30.05 in 10.0 mi WNW 5.8 mph - N/A   Clear
2:27 AM 53.6 °F 48.2 °F 82% 30.05 in 10.0 mi West 5.8 mph - N/A   Mostly Cloudy
2:53 AM 53.1 °F 48.9 °F 86% 30.04 in 10.0 mi West 5.8 mph - N/A   Mostly Cloudy
3:28 AM 53.6 °F 50.0 °F 88% 30.05 in 10.0 mi WNW 9.2 mph - N/A   Overcast
3:53 AM 54.0 °F 48.9 °F 83% 30.04 in 10.0 mi WNW 10.4 mph - N/A   Overcast
5:53 AM 53.1 °F 48.0 °F 83% 30.06 in 10.0 mi WNW 8.1 mph - N/A   Overcast
6:28 AM 53.6 °F 48.2 °F 82% 30.08 in 10.0 mi West 6.9 mph - N/A   Overcast
6:53 AM 54.0 °F 48.0 °F 80% 30.08 in 10.0 mi NW 5.8 mph - N/A   Overcast
7:53 AM 54.0 °F 46.9 °F 77% 30.09 in 10.0 mi WNW 5.8 mph - N/A   Overcast
8:53 AM 55.0 °F 46.9 °F 74% 30.10 in 10.0 mi WNW 4.6 mph - N/A   Mostly Cloudy
9:16 AM 55.4 °F 46.4 °F 72% 30.10 in 10.0 mi West 4.6 mph - N/A   Partly Cloudy
9:53 AM 57.9 °F 46.9 °F 67% 30.10 in 10.0 mi WNW 3.5 mph - N/A   Clear
10:53 AM 62.1 °F 46.9 °F 58% 30.09 in 10.0 mi Variable 3.5 mph - N/A   Clear
11:53 AM 68.0 °F 48.0 °F 49% 30.08 in 10.0 mi Variable 4.6 mph - N/A   Clear
12:53 PM 71.1 °F 46.9 °F 42% 30.06 in 10.0 mi Variable 6.9 mph - N/A   Clear
1:53 PM 73.9 °F 46.9 °F 38% 30.03 in 10.0 mi Variable 4.6 mph - N/A   Clear
2:53 PM 75.9 °F 46.0 °F 35% 30.01 in 10.0 mi WNW 10.4 mph - N/A   Clear
3:53 PM 77.0 °F 45.0 °F 32% 30.01 in 10.0 mi WNW 11.5 mph - N/A   Clear
4:53 PM 75.9 °F 45.0 °F 33% 29.99 in 10.0 mi West 13.8 mph - N/A   Clear
5:53 PM 71.1 °F 48.0 °F 44% 30.00 in 10.0 mi WNW 13.8 mph - N/A   Clear
6:53 PM 66.0 °F 48.9 °F 54% 30.01 in 10.0 mi WNW 13.8 mph - N/A   Clear
7:53 PM 61.0 °F 50.0 °F 67% 30.03 in 10.0 mi WNW 10.4 mph - N/A   Clear
8:53 PM 59.0 °F 50.0 °F 72% 30.06 in 10.0 mi WNW 10.4 mph - N/A   Clear
9:53 PM 57.9 °F 51.1 °F 78% 30.06 in 10.0 mi WNW 8.1 mph - N/A   Clear
10:53 PM 57.0 °F 51.1 °F 81% 30.07 in 10.0 mi WNW 5.8 mph - N/A   Clear
11:53 PM 55.0 °F 50.0 °F 83% 30.07 in 10.0 mi West 3.5 mph - N/A   Clear