Weather History for Petaluma, CA

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Saturday, December 21, 2013

  Actual Average (KAPC) Record (KAPC)
Temperature  
Mean Temperature 50 °F 45 °F  
Max Temperature 64 °F 55 °F 71 °F (1999)
Min Temperature 37 °F 36 °F 21 °F (1998)
Degree Days  
Heating Degree Days 14    
Month to date heating degree days  
Since 1 July heating degree days  
Cooling Degree Days 0    
Month to date cooling degree days  
Year to date cooling degree days  
Moisture  
Dew Point 43 °F    
Average Humidity 86    
Maximum Humidity 100    
Minimum Humidity 52    
Precipitation  
Precipitation 0.00 in - 2.10 in (1924)
Month to date precipitation  
Year to date precipitation  
Since 1 July precipitation  
Sea Level Pressure  
Sea Level Pressure 30.04 in    
Wind  
Wind Speed 2 mph (WNW)    
Max Wind Speed 10 mph    
Max Gust Speed -    
Visibility 9 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Astronomy

Dec. 21, 2013 Rise Set
Actual Time 7:23 AM PST 4:53 PM PST
Civil Twilight 6:54 AM PST 5:23 PM PST
Nautical Twilight 6:20 AM PST 5:56 PM PST
Astronomical Twilight 5:48 AM PST 6:28 PM PST
Moon 9:11 PM PST (12/21) 9:55 AM PST (12/21)
Length of Visible Light 10h 29m
Length of Day
9h 30m
Waning Gibbous, 83% of the Moon is Illuminated
Dec 21
Waning Gibbous
Dec 25
Last Quarter
Jan 1
New
Jan 7
First Quarter
Jan 15
Full

Hourly Weather History & Observations

Time (PST) Temp. Windchill Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:15 AM 39.2 °F - 39.2 °F 100% 30.00 in 10.0 mi Calm Calm - N/A   Overcast
12:35 AM 41.0 °F 39.0 °F 41.0 °F 100% 30.00 in 10.0 mi NNW 3.5 mph - N/A   Overcast
12:55 AM 41.0 °F 39.0 °F 41.0 °F 100% 30.00 in 10.0 mi WNW 3.5 mph - N/A   Overcast
1:15 AM 42.8 °F - 41.0 °F 93% 29.99 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
1:35 AM 41.0 °F - 41.0 °F 100% 30.00 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
1:55 AM 41.0 °F 39.0 °F 41.0 °F 100% 30.00 in 10.0 mi SE 3.5 mph - N/A   Mostly Cloudy
2:15 AM 41.0 °F - 41.0 °F 100% 30.00 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
2:35 AM 41.0 °F - 41.0 °F 100% 30.00 in 10.0 mi Calm Calm - N/A   Partly Cloudy
2:55 AM 41.0 °F - 41.0 °F 100% 30.00 in 10.0 mi Calm Calm - N/A   Scattered Clouds
3:15 AM 41.0 °F - 41.0 °F 100% 30.00 in 10.0 mi Calm Calm - N/A   Scattered Clouds
3:35 AM 44.6 °F 40.2 °F 44.6 °F 100% 30.00 in 10.0 mi West 8.1 mph - N/A   Mostly Cloudy
3:55 AM 42.8 °F - 42.8 °F 100% 30.00 in 10.0 mi Calm Calm - N/A   Overcast
4:15 AM 44.6 °F - 44.6 °F 100% 30.00 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
4:35 AM 41.0 °F - 41.0 °F 100% 30.01 in 10.0 mi Calm Calm - N/A   Overcast
4:55 AM 39.2 °F - 39.2 °F 100% 30.01 in 4.0 mi Calm Calm - N/A   Overcast
5:15 AM 39.2 °F - 39.2 °F 100% 30.01 in 6.0 mi Calm Calm - N/A   Overcast
5:35 AM 39.2 °F - 39.2 °F 100% 30.01 in 4.0 mi Calm Calm - N/A   Overcast
5:55 AM 37.4 °F - 37.4 °F 100% 30.02 in 3.0 mi Calm Calm - N/A   Overcast
6:15 AM 37.4 °F - 37.4 °F 100% 30.02 in 2.0 mi Calm Calm - N/A   Overcast
6:35 AM 37.4 °F - 37.4 °F 100% 30.03 in 0.8 mi Calm Calm - N/A   Overcast
6:55 AM 39.2 °F - 39.2 °F 100% 30.03 in 0.2 mi Calm Calm - N/A   Overcast
7:15 AM 39.2 °F - 39.2 °F 100% 30.04 in 0.5 mi Calm Calm - N/A   Overcast
7:35 AM 37.4 °F - 37.4 °F 100% 30.04 in 0.2 mi Calm Calm - N/A   Overcast
7:55 AM 39.2 °F - 39.2 °F 100% 30.05 in 0.2 mi Calm Calm - N/A   Overcast
8:15 AM 39.2 °F - 39.2 °F 100% 30.06 in 0.2 mi Calm Calm - N/A   Mostly Cloudy
8:35 AM 41.0 °F - 41.0 °F 100% 30.07 in 0.8 mi Calm Calm - N/A   Mostly Cloudy
8:55 AM 44.6 °F - 44.6 °F 100% 30.07 in 9.0 mi Calm Calm - N/A   Partly Cloudy
9:15 AM 46.4 °F - 46.4 °F 100% 30.07 in 10.0 mi Calm Calm - N/A   Clear
9:35 AM 48.2 °F - 48.2 °F 100% 30.08 in 10.0 mi Calm Calm - N/A   Clear
9:55 AM 53.6 °F - 48.2 °F 82% 30.08 in 10.0 mi West 4.6 mph - N/A   Clear
10:15 AM 55.4 °F - 48.2 °F 77% 30.08 in 10.0 mi West 4.6 mph - N/A   Clear
10:35 AM 57.2 °F - 46.4 °F 67% 30.08 in 10.0 mi West 4.6 mph - N/A   Clear
10:55 AM 57.2 °F - 46.4 °F 67% 30.08 in 10.0 mi WNW 4.6 mph - N/A   Clear
11:15 AM 59.0 °F - 46.4 °F 63% 30.07 in 10.0 mi West 5.8 mph - N/A   Clear
11:35 AM 60.8 °F - 46.4 °F 59% 30.06 in 10.0 mi West 6.9 mph - N/A   Clear
11:55 AM 60.8 °F - 46.4 °F 59% 30.05 in 10.0 mi West 5.8 mph - N/A   Clear
12:15 PM 60.8 °F - 46.4 °F 59% 30.04 in 10.0 mi West 9.2 mph - N/A   Clear
12:35 PM 62.6 °F - 46.4 °F 55% 30.04 in 10.0 mi WNW 4.6 mph - N/A   Clear
12:55 PM 62.6 °F - 46.4 °F 55% 30.04 in 10.0 mi West 4.6 mph - N/A   Clear
1:15 PM 62.6 °F - 46.4 °F 55% 30.03 in 10.0 mi WNW 8.1 mph - N/A   Clear
1:35 PM 64.4 °F - 46.4 °F 52% 30.03 in 10.0 mi West 5.8 mph - N/A   Clear
1:55 PM 64.4 °F - 46.4 °F 52% 30.01 in 10.0 mi WSW 8.1 mph - N/A   Clear
2:15 PM 64.4 °F - 46.4 °F 52% 30.01 in 10.0 mi West 6.9 mph - N/A   Clear
2:35 PM 64.4 °F - 46.4 °F 52% 30.01 in 10.0 mi West 10.4 mph - N/A   Clear
2:55 PM 64.4 °F - 46.4 °F 52% 30.01 in 10.0 mi West 6.9 mph - N/A   Clear
3:15 PM 64.4 °F - 46.4 °F 52% 30.01 in 10.0 mi West 8.1 mph - N/A   Clear
3:35 PM 62.6 °F - 46.4 °F 55% 30.01 in 10.0 mi West 10.4 mph - N/A   Clear
3:55 PM 62.6 °F - 46.4 °F 55% 30.01 in 10.0 mi WSW 6.9 mph - N/A   Clear
4:15 PM 60.8 °F - 48.2 °F 63% 30.01 in 10.0 mi West 6.9 mph - N/A   Clear
4:35 PM 59.0 °F - 48.2 °F 67% 30.01 in 10.0 mi WNW 5.8 mph - N/A   Clear
4:55 PM 57.2 °F - 46.4 °F 67% 30.02 in 10.0 mi WNW 3.5 mph - N/A   Clear
5:15 PM 55.4 °F - 46.4 °F 72% 30.02 in 10.0 mi West 5.8 mph - N/A   Clear
5:35 PM 53.6 °F - 48.2 °F 82% 30.02 in 10.0 mi West 5.8 mph - N/A   Clear
5:55 PM 53.6 °F - 48.2 °F 82% 30.03 in 10.0 mi WNW 8.1 mph - N/A   Clear
6:15 PM 50.0 °F - 46.4 °F 87% 30.04 in 10.0 mi Calm Calm - N/A   Partly Cloudy
6:35 PM 50.0 °F - 48.2 °F 94% 30.04 in 10.0 mi NNW 3.5 mph - N/A   Scattered Clouds
6:55 PM 46.4 °F 43.5 °F 46.4 °F 100% 30.05 in 10.0 mi North 5.8 mph - N/A   Partly Cloudy
7:15 PM 46.4 °F - 44.6 °F 93% 30.06 in 10.0 mi Calm Calm - N/A   Partly Cloudy
7:35 PM 44.6 °F - 44.6 °F 100% 30.06 in 10.0 mi Calm Calm - N/A   Partly Cloudy
7:55 PM 48.2 °F - 46.4 °F 93% 30.06 in 10.0 mi NW 3.5 mph - N/A   Clear
8:15 PM 42.8 °F - 42.8 °F 100% 30.07 in 10.0 mi Calm Calm - N/A   Clear
8:35 PM 42.8 °F - 42.8 °F 100% 30.07 in 10.0 mi Calm Calm - N/A   Clear
8:55 PM 41.0 °F - 41.0 °F 100% 30.08 in 10.0 mi Calm Calm - N/A   Clear
9:15 PM 41.0 °F - 41.0 °F 100% 30.08 in 10.0 mi Calm Calm - N/A   Clear
9:35 PM 39.2 °F - 39.2 °F 100% 30.09 in 10.0 mi Calm Calm - N/A   Clear
9:55 PM 39.2 °F - 39.2 °F 100% 30.10 in 10.0 mi Calm Calm - N/A   Clear
10:15 PM 39.2 °F 37.0 °F 39.2 °F 100% 30.10 in 10.0 mi North 3.5 mph - N/A   Clear
10:35 PM 39.2 °F - 39.2 °F 100% 30.10 in 10.0 mi Calm Calm - N/A   Clear
10:55 PM 39.2 °F 37.0 °F 39.2 °F 100% 30.11 in 10.0 mi East 3.5 mph - N/A   Clear
11:15 PM 39.2 °F - 39.2 °F 100% 30.11 in 10.0 mi Calm Calm - N/A   Clear
11:35 PM 39.2 °F - 39.2 °F 100% 30.11 in 10.0 mi Calm Calm - N/A   Clear
11:55 PM 39.2 °F - 39.2 °F 100% 30.11 in 10.0 mi Calm Calm - N/A   Clear