Weather History for Palo Alto, CA

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Friday, December 16, 2011

  Actual Average Record
Temperature  
Mean Temperature 52 °F -  
Max Temperature 62 °F 57 °F 73 °F (1998)
Min Temperature 41 °F 36 °F 26 °F (1965)
Degree Days  
Heating Degree Days 14    
Growing Degree Days 2 (Base 50)    
Moisture  
Dew Point 37 °F    
Average Humidity 58    
Maximum Humidity 81    
Minimum Humidity 37    
Precipitation  
Precipitation 0.00 in - - ()
Sea Level Pressure  
Sea Level Pressure 30.19 in    
Wind  
Wind Speed 5 mph (North)    
Max Wind Speed 7 mph    
Max Gust Speed -    
Visibility 20 miles    
Events      
Averages and records for this station are not official NWS values.
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Date:

Astronomy

Dec. 16, 2011 Rise Set
Actual Time 7:16 AM PST 4:51 PM PST
Civil Twilight 6:47 AM PST 5:21 PM PST
Nautical Twilight 6:14 AM PST 5:53 PM PST
Astronomical Twilight 5:42 AM PST 6:25 PM PST
Moon 11:23 PM PST (12/16) 11:11 AM PST (12/16)
Length of Visible Light 10h 34m
Length of Day
9h 35m
Waning Gibbous, 63% of the Moon is Illuminated
Dec 16
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
7:47 AM 41.0 °F 38.0 °F 35.6 °F 81% 30.25 in 30.0 mi Variable 4.6 mph - N/A   Partly Cloudy
8:47 AM 48.2 °F - 39.2 °F 71% 30.27 in 30.0 mi Variable 4.6 mph - N/A   Partly Cloudy
9:47 AM 51.8 °F - 39.2 °F 62% 30.28 in 30.0 mi Variable 3.5 mph - N/A   Partly Cloudy
10:47 AM 55.4 °F - 37.4 °F 51% 30.27 in 30.0 mi Variable 4.6 mph - N/A   Partly Cloudy
11:47 AM 57.2 °F - 35.6 °F 44% 30.24 in 30.0 mi North 6.9 mph - N/A   Clear
12:47 PM 57.2 °F - 35.6 °F 44% 30.21 in 30.0 mi Variable 5.8 mph - N/A   Clear
1:47 PM 60.8 °F - 35.6 °F 39% 30.18 in 30.0 mi Variable 5.8 mph - N/A   Partly Cloudy
2:47 PM 62.6 °F - 35.6 °F 37% 30.15 in 20.0 mi Variable 4.6 mph - N/A   Partly Cloudy
3:47 PM 60.8 °F - 35.6 °F 39% 30.14 in 30.0 mi Variable 4.6 mph - N/A   Partly Cloudy
4:47 PM 57.2 °F - 37.4 °F 48% 30.14 in 30.0 mi Variable 4.6 mph - N/A   Partly Cloudy
5:47 PM 50.0 °F - 41.0 °F 71% 30.13 in 30.0 mi Variable 4.6 mph - N/A   Partly Cloudy
6:47 PM 48.2 °F - 37.4 °F 66% 30.14 in 20.0 mi Variable 3.5 mph - N/A   Partly Cloudy
7:47 PM 42.8 °F 41.1 °F 37.4 °F 81% 30.14 in 20.0 mi Variable 3.5 mph - N/A   Clear
8:47 PM 44.6 °F 43.1 °F 37.4 °F 76% 30.14 in 20.0 mi Variable 3.5 mph - N/A   Clear