Weather History for Palo Alto, CA

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Sunday, September 30, 2012

  Actual Average Record
Temperature  
Mean Temperature 70 °F -  
Max Temperature 86 °F 78 °F 95 °F (1966)
Min Temperature 55 °F 51 °F 42 °F (1954)
Cooling Degree Days 6    
Growing Degree Days 20 (Base 50)    
Moisture  
Dew Point 57 °F    
Average Humidity 63    
Maximum Humidity 88    
Minimum Humidity 33    
Precipitation  
Precipitation 0.00 in - - ()
Sea Level Pressure  
Sea Level Pressure 30.01 in    
Wind  
Wind Speed 7 mph (NNW)    
Max Wind Speed 17 mph    
Max Gust Speed -    
Visibility 12 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. 30, 2012 Rise Set
Actual Time 7:03 AM PDT 6:52 PM PDT
Civil Twilight 6:37 AM PDT 7:18 PM PDT
Nautical Twilight 6:07 AM PDT 7:48 PM PDT
Astronomical Twilight 5:36 AM PDT 8:18 PM PDT
Moon 7:01 PM PDT (9/30) 7:37 AM PDT (9/30)
Length of Visible Light 12h 40m
Length of Day
11h 48m
Full, 100% of the Moon is Illuminated
Sep 30
Full
Oct 8
Last Quarter
Oct 15
New
Oct 21
First Quarter
Oct 29
Full

Hourly Weather History & Observations

Time (PDT) Temp. Heat Index Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
7:52 AM 55.4 °F - 51.8 °F 88% 30.05 in 10.0 mi Variable 4.6 mph - N/A   Clear
8:47 AM 60.8 °F - 55.4 °F 82% 30.06 in 10.0 mi Variable 4.6 mph - N/A   Clear
9:47 AM 64.4 °F - 57.2 °F 77% 30.06 in 10.0 mi Variable 4.6 mph - N/A   Clear
10:47 AM 66.2 °F - 59.0 °F 78% 30.06 in 15.0 mi NNE 8.1 mph - N/A   Clear
11:47 AM 69.8 °F - 60.8 °F 73% 30.05 in 15.0 mi North 6.9 mph - N/A   Clear
12:47 PM 71.6 °F - 62.6 °F 73% 30.03 in 30.0 mi NNE 9.2 mph - N/A   Clear
1:47 PM 77.0 °F - 62.6 °F 61% 30.00 in 30.0 mi West 11.5 mph - N/A   Clear
2:47 PM 82.4 °F 82.9 °F 60.8 °F 48% 29.98 in 30.0 mi North 10.4 mph - N/A   Clear
3:47 PM 86.0 °F 84.2 °F 53.6 °F 33% 29.96 in 30.0 mi NNW 11.5 mph - N/A   Clear
4:47 PM 82.4 °F 82.5 °F 59.0 °F 45% 29.95 in 30.0 mi NNW 17.3 mph - N/A   Clear
6:47 PM 71.6 °F - 57.2 °F 60% 29.94 in 30.0 mi NW 11.5 mph - N/A   Clear
7:47 PM 71.6 °F - 53.6 °F 53% 29.96 in 25.0 mi NW 8.1 mph - N/A   Clear
8:47 PM 68.0 °F - 50.0 °F 52% 29.97 in 25.0 mi Variable 5.8 mph - N/A   Clear