Weather History for Palo Alto, CA

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Thursday, September 29, 2011

  Actual Average Record
Temperature  
Mean Temperature 66 °F -  
Max Temperature 73 °F 77 °F 93 °F (1956)
Min Temperature 60 °F 52 °F 41 °F (1981)
Cooling Degree Days 2    
Growing Degree Days 16 (Base 50)    
Moisture  
Dew Point 62 °F    
Average Humidity 79    
Maximum Humidity 94    
Minimum Humidity 65    
Precipitation  
Precipitation 0.00 in - - ()
Sea Level Pressure  
Sea Level Pressure 29.90 in    
Wind  
Wind Speed 10 mph (NNW)    
Max Wind Speed 18 mph    
Max Gust Speed 23 mph    
Visibility 16 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

Sep. 29, 2011 Rise Set
Actual Time 7:02 AM PDT 6:54 PM PDT
Civil Twilight 6:36 AM PDT 7:20 PM PDT
Nautical Twilight 6:05 AM PDT 7:51 PM PDT
Astronomical Twilight 5:35 AM PDT 8:21 PM PDT
Moon 9:48 AM PDT (9/29) 8:17 PM PDT (9/29)
Length of Visible Light 12h 44m
Length of Day
11h 52m
Waxing Crescent, 8% of the Moon is Illuminated
Sep 29
Waxing Crescent
Oct 3
First Quarter
Oct 11
Full
Oct 19
Last Quarter
Oct 26
New

Hourly Weather History & Observations

Time (PDT) Temp. Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
6:47 AM 60.8 °F 57.2 °F 88% 29.90 in 30.0 mi Variable 4.6 mph - N/A   Partly Cloudy
7:47 AM 62.6 °F 57.2 °F 82% 29.91 in 15.0 mi Variable 5.8 mph - N/A   Partly Cloudy
8:47 AM 68.0 °F 60.8 °F 78% 29.91 in 15.0 mi NW 5.8 mph - N/A   Partly Cloudy
10:47 AM 71.6 °F 62.6 °F 73% 29.93 in 15.0 mi North 13.8 mph - N/A   Scattered Clouds
11:47 AM 73.4 °F 60.8 °F 65% 29.93 in 30.0 mi NNW 13.8 mph - N/A   Scattered Clouds
12:47 PM 73.4 °F 60.8 °F 65% 29.92 in 30.0 mi NW 15.0 mph - N/A   Scattered Clouds
1:47 PM 73.4 °F 62.6 °F 69% 29.91 in 30.0 mi North 16.1 mph - N/A   Scattered Clouds
2:47 PM 73.4 °F 64.4 °F 73% 29.90 in 30.0 mi North 18.4 mph - N/A   Scattered Clouds
3:47 PM 73.4 °F 64.4 °F 73% 29.89 in 30.0 mi North 17.3 mph 23.0 mph N/A   Scattered Clouds
5:55 PM 68.0 °F 64.4 °F 88% 29.88 in 30.0 mi North 17.3 mph - N/A   Scattered Clouds
6:47 PM 68.0 °F 64.4 °F 88% 29.88 in 30.0 mi North 16.1 mph - N/A   Scattered Clouds
7:47 PM 66.2 °F 62.6 °F 88% 29.89 in 30.0 mi North 11.5 mph - N/A   Scattered Clouds
8:54 PM 64.4 °F 62.6 °F 94% 29.90 in 20.0 mi North 11.5 mph - N/A   Scattered Clouds