Weather History for Petaluma, CA

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Wednesday, December 18, 2013

  Actual Average (KAPC) Record (KAPC)
Temperature  
Mean Temperature 45 °F 45 °F  
Max Temperature 57 °F 55 °F 62 °F (2003)
Min Temperature 33 °F 36 °F 21 °F (2006)
Degree Days  
Heating Degree Days 20    
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 42 °F    
Average Humidity 91    
Maximum Humidity 100    
Minimum Humidity 63    
Precipitation  
Precipitation 0.00 in - 2.19 in (2005)
Month to date precipitation  
Year to date precipitation  
Since 1 July precipitation  
Sea Level Pressure  
Sea Level Pressure 29.92 in    
Wind  
Wind Speed 3 mph (WNW)    
Max Wind Speed 10 mph    
Max Gust Speed -    
Visibility 10 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Date:

Astronomy

Dec. 18, 2013 Rise Set
Actual Time 7:22 AM PST 4:52 PM PST
Civil Twilight 6:52 AM PST 5:22 PM PST
Nautical Twilight 6:19 AM PST 5:55 PM PST
Astronomical Twilight 5:47 AM PST 6:27 PM PST
Moon 6:27 PM PST (12/18) 8:06 AM PST (12/18)
Length of Visible Light 10h 29m
Length of Day
9h 30m
Full, 98% of the Moon is Illuminated
Dec 18
Full
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 35.6 °F - 35.6 °F 100% 30.06 in 10.0 mi Calm Calm - N/A   Partly Cloudy
12:35 AM 35.6 °F - 35.6 °F 100% 30.06 in 10.0 mi Calm Calm - N/A   Scattered Clouds
12:55 AM 37.4 °F 33.8 °F 37.4 °F 100% 30.06 in 10.0 mi North 4.6 mph - N/A   Mostly Cloudy
1:15 AM 37.4 °F - 37.4 °F 100% 30.06 in 10.0 mi Calm Calm - N/A   Scattered Clouds
1:35 AM 37.4 °F - 37.4 °F 100% 30.06 in 10.0 mi Calm Calm - N/A   Partly Cloudy
1:55 AM 37.4 °F - 37.4 °F 100% 30.05 in 10.0 mi Calm Calm - N/A   Partly Cloudy
2:15 AM 37.4 °F 34.9 °F 37.4 °F 100% 30.05 in 10.0 mi SW 3.5 mph - N/A   Clear
2:35 AM 35.6 °F - 35.6 °F 100% 30.04 in 10.0 mi Calm Calm - N/A   Clear
2:55 AM 35.6 °F - 35.6 °F 100% 30.04 in 10.0 mi Calm Calm - N/A   Partly Cloudy
3:15 AM 35.6 °F 31.7 °F 35.6 °F 100% 30.03 in 9.0 mi North 4.6 mph - N/A   Scattered Clouds
3:35 AM 39.2 °F 35.9 °F 39.2 °F 100% 30.02 in 10.0 mi WSW 4.6 mph - N/A   Mostly Cloudy
3:55 AM 39.2 °F 33.6 °F 39.2 °F 100% 30.03 in 10.0 mi West 8.1 mph - N/A   Scattered Clouds
4:15 AM 39.2 °F 35.0 °F 39.2 °F 100% 30.02 in 10.0 mi NW 5.8 mph - N/A   Partly Cloudy
4:35 AM 37.4 °F - 37.4 °F 100% 30.01 in 10.0 mi Calm Calm - N/A   Partly Cloudy
4:55 AM 37.4 °F - 37.4 °F 100% 30.01 in 10.0 mi Calm Calm - N/A   Scattered Clouds
5:15 AM 35.6 °F - 35.6 °F 100% 30.01 in 9.0 mi Calm Calm - N/A   Scattered Clouds
5:35 AM 35.6 °F - 35.6 °F 100% 30.01 in 9.0 mi Calm Calm - N/A   Partly Cloudy
5:55 AM 35.6 °F - 35.6 °F 100% 30.01 in 10.0 mi Calm Calm - N/A   Partly Cloudy
6:15 AM 33.8 °F - 33.8 °F 100% 30.00 in 10.0 mi Calm Calm - N/A   Partly Cloudy
6:35 AM 35.6 °F - 35.6 °F 100% 30.00 in 10.0 mi Calm Calm - N/A   Partly Cloudy
6:55 AM 35.6 °F - 35.6 °F 100% 30.00 in 10.0 mi Calm Calm - N/A   Partly Cloudy
7:15 AM 37.4 °F 32.8 °F 37.4 °F 100% 30.00 in 10.0 mi NW 5.8 mph - N/A   Clear
7:35 AM 37.4 °F 32.8 °F 37.4 °F 100% 30.00 in 10.0 mi West 5.8 mph - N/A   Clear
7:55 AM 37.4 °F 33.8 °F 37.4 °F 100% 30.00 in 9.0 mi NW 4.6 mph - N/A   Clear
8:15 AM 39.2 °F 35.9 °F 39.2 °F 100% 30.00 in 10.0 mi WNW 4.6 mph - N/A   Clear
8:35 AM 41.0 °F 37.1 °F 39.2 °F 93% 30.01 in 10.0 mi West 5.8 mph - N/A   Clear
8:55 AM 41.0 °F 38.0 °F 39.2 °F 93% 30.02 in 10.0 mi WNW 4.6 mph - N/A   Clear
9:15 AM 42.8 °F 39.3 °F 41.0 °F 93% 30.01 in 10.0 mi WNW 5.8 mph - N/A   Clear
9:35 AM 46.4 °F 44.3 °F 41.0 °F 81% 30.01 in 10.0 mi WNW 4.6 mph - N/A   Clear
9:55 AM 48.2 °F - 39.2 °F 71% 30.00 in 10.0 mi WNW 6.9 mph - N/A   Clear
10:15 AM 50.0 °F - 39.2 °F 66% 29.99 in 10.0 mi NW 4.6 mph - N/A   Clear
10:35 AM 48.2 °F - 39.2 °F 71% 29.99 in 10.0 mi NW 6.9 mph - N/A   Clear
10:55 AM 50.0 °F - 39.2 °F 66% 29.99 in 10.0 mi WNW 5.8 mph - N/A   Clear
11:15 AM 51.8 °F - 41.0 °F 67% 29.97 in 10.0 mi NW 8.1 mph - N/A   Clear
11:35 AM 51.8 °F - 41.0 °F 67% 29.95 in 10.0 mi WNW 4.6 mph - N/A   Clear
11:55 AM 55.4 °F - 42.8 °F 63% 29.94 in 10.0 mi WNW 5.8 mph - N/A   Clear
12:15 PM 53.6 °F - 44.6 °F 72% 29.92 in 10.0 mi NNW 4.6 mph - N/A   Clear
12:35 PM 55.4 °F - 44.6 °F 67% 29.91 in 10.0 mi NW 4.6 mph - N/A   Clear
12:55 PM 55.4 °F - 42.8 °F 63% 29.90 in 10.0 mi WNW 9.2 mph - N/A   Clear
1:15 PM 57.2 °F - 44.6 °F 63% 29.88 in 10.0 mi WNW 9.2 mph - N/A   Clear
1:35 PM 57.2 °F - 44.6 °F 63% 29.87 in 10.0 mi West 10.4 mph - N/A   Clear
1:55 PM 57.2 °F - 44.6 °F 63% 29.87 in 10.0 mi West 9.2 mph - N/A   Clear
2:15 PM 55.4 °F - 46.4 °F 72% 29.86 in 10.0 mi WNW 5.8 mph - N/A   Clear
2:35 PM 55.4 °F - 46.4 °F 72% 29.85 in 10.0 mi NW 4.6 mph - N/A   Clear
2:55 PM 55.4 °F - 46.4 °F 72% 29.85 in 10.0 mi West 9.2 mph - N/A   Clear
3:15 PM 55.4 °F - 46.4 °F 72% 29.85 in 10.0 mi WNW 8.1 mph - N/A   Clear
3:35 PM 53.6 °F - 46.4 °F 77% 29.85 in 10.0 mi West 10.4 mph - N/A   Clear
3:55 PM 51.8 °F - 46.4 °F 82% 29.85 in 10.0 mi WSW 8.1 mph - N/A   Clear
4:15 PM 50.0 °F - 48.2 °F 94% 29.84 in 10.0 mi West 5.8 mph - N/A   Clear
4:35 PM 50.0 °F - 48.2 °F 94% 29.83 in 9.0 mi Calm Calm - N/A   Clear
4:55 PM 50.0 °F - 48.2 °F 94% 29.83 in 9.0 mi Calm Calm - N/A   Clear
5:15 PM 48.2 °F - 48.2 °F 100% 29.82 in 10.0 mi Calm Calm - N/A   Partly Cloudy
5:35 PM 48.2 °F - 48.2 °F 100% 29.82 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
5:55 PM 46.4 °F - 46.4 °F 100% 29.82 in 10.0 mi Calm Calm - N/A   Overcast
6:15 PM 46.4 °F 45.2 °F 46.4 °F 100% 29.82 in 10.0 mi NW 3.5 mph - N/A   Overcast
6:35 PM 46.4 °F - 46.4 °F 100% 29.83 in 10.0 mi Calm Calm - N/A   Overcast
6:55 PM 48.2 °F - 48.2 °F 100% 29.82 in 10.0 mi Calm Calm - N/A   Overcast
7:15 PM 48.2 °F - 48.2 °F 100% 29.82 in 10.0 mi West 4.6 mph - N/A   Overcast
7:35 PM 48.2 °F - 48.2 °F 100% 29.82 in 10.0 mi West 8.1 mph - N/A   Mostly Cloudy
7:55 PM 44.6 °F - 44.6 °F 100% 29.82 in 9.0 mi Calm Calm - N/A   Mostly Cloudy
8:15 PM 46.4 °F 45.2 °F 46.4 °F 100% 29.81 in 9.0 mi NW 3.5 mph - N/A   Mostly Cloudy
8:35 PM 44.6 °F 43.1 °F 44.6 °F 100% 29.81 in 9.0 mi NW 3.5 mph - N/A   Mostly Cloudy
8:55 PM 44.6 °F 42.2 °F 44.6 °F 100% 29.81 in 9.0 mi NW 4.6 mph - N/A   Mostly Cloudy
9:15 PM 44.6 °F 42.2 °F 44.6 °F 100% 29.81 in 10.0 mi NW 4.6 mph - N/A   Mostly Cloudy
9:35 PM 44.6 °F 40.7 °F 44.6 °F 100% 29.80 in 10.0 mi WNW 6.9 mph - N/A   Scattered Clouds
9:55 PM 42.8 °F 38.0 °F 42.8 °F 100% 29.80 in 10.0 mi WNW 8.1 mph - N/A   Mostly Cloudy
10:15 PM 42.8 °F 38.0 °F 42.8 °F 100% 29.80 in 10.0 mi WNW 8.1 mph - N/A   Scattered Clouds
10:35 PM 42.8 °F 40.1 °F 42.8 °F 100% 29.80 in 10.0 mi WNW 4.6 mph - N/A   Scattered Clouds
10:55 PM 44.6 °F 42.2 °F 44.6 °F 100% 29.80 in 10.0 mi NW 4.6 mph - N/A   Scattered Clouds
11:15 PM 44.6 °F 42.2 °F 44.6 °F 100% 29.80 in 10.0 mi NW 4.6 mph - N/A   Mostly Cloudy
11:35 PM 44.6 °F 39.7 °F 42.8 °F 93% 29.79 in 10.0 mi WNW 9.2 mph - N/A   Mostly Cloudy
11:55 PM 46.4 °F 41.5 °F 44.6 °F 93% 29.79 in 10.0 mi West 10.4 mph - N/A   Partly Cloudy