Weather History for Petaluma, CA

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Thursday, December 19, 2013

  Actual Average (KAPC) Record (KAPC)
Temperature  
Mean Temperature 49 °F 45 °F  
Max Temperature 59 °F 55 °F 78 °F (1999)
Min Temperature 39 °F 36 °F 21 °F (2006)
Degree Days  
Heating Degree Days 16    
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 30 °F    
Average Humidity 58    
Maximum Humidity 100    
Minimum Humidity 19    
Precipitation  
Precipitation 0.00 in - 2.85 in (1955)
Month to date precipitation  
Year to date precipitation  
Since 1 July precipitation  
Sea Level Pressure  
Sea Level Pressure 29.84 in    
Wind  
Wind Speed 7 mph (WNW)    
Max Wind Speed 14 mph    
Max Gust Speed 21 mph    
Visibility 10 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Astronomy

Dec. 19, 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 7:21 PM PST (12/19) 8:46 AM PST (12/19)
Length of Visible Light 10h 29m
Length of Day
9h 30m
Waning Gibbous, 95% of the Moon is Illuminated
Dec 19
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 44.6 °F 39.2 °F 42.8 °F 93% 29.77 in 10.0 mi West 10.4 mph - N/A   Clear
12:35 AM 44.6 °F 39.7 °F 42.8 °F 93% 29.77 in 10.0 mi WNW 9.2 mph - N/A   Clear
12:55 AM 42.8 °F 37.5 °F 42.8 °F 100% 29.78 in 10.0 mi WNW 9.2 mph - N/A   Clear
1:15 AM 42.8 °F 38.0 °F 41.0 °F 93% 29.77 in 10.0 mi WNW 8.1 mph - N/A   Clear
1:35 AM 41.0 °F 35.2 °F 41.0 °F 100% 29.77 in 10.0 mi WNW 9.2 mph - N/A   Clear
1:55 AM 42.8 °F 37.5 °F 37.4 °F 81% 29.77 in 10.0 mi WNW 9.2 mph - N/A   Clear
2:15 AM 41.0 °F 36.4 °F 37.4 °F 87% 29.77 in 10.0 mi NW 6.9 mph - N/A   Partly Cloudy
2:35 AM 41.0 °F 36.4 °F 35.6 °F 81% 29.77 in 10.0 mi West 6.9 mph - N/A   Partly Cloudy
2:55 AM 41.0 °F 36.4 °F 37.4 °F 87% 29.77 in 10.0 mi West 6.9 mph - N/A   Clear
3:15 AM 41.0 °F 36.4 °F 35.6 °F 81% 29.77 in 10.0 mi WNW 6.9 mph - N/A   Partly Cloudy
3:35 AM 41.0 °F 36.4 °F 37.4 °F 87% 29.77 in 10.0 mi WNW 6.9 mph - N/A   Partly Cloudy
3:55 AM 39.2 °F 35.0 °F 37.4 °F 93% 29.77 in 10.0 mi WNW 5.8 mph - N/A   Clear
4:15 AM 39.2 °F 34.2 °F 37.4 °F 93% 29.76 in 10.0 mi West 6.9 mph - N/A   Clear
4:35 AM 39.2 °F 35.0 °F 35.6 °F 87% 29.76 in 10.0 mi West 5.8 mph - N/A   Clear
4:55 AM 41.0 °F 36.4 °F 35.6 °F 81% 29.77 in 10.0 mi WSW 6.9 mph - N/A   Partly Cloudy
5:15 AM 41.0 °F 36.4 °F 35.6 °F 81% 29.76 in 10.0 mi WSW 6.9 mph - N/A   Clear
5:35 AM 41.0 °F 35.8 °F 35.6 °F 81% 29.77 in 10.0 mi West 8.1 mph - N/A   Clear
5:55 AM 39.2 °F 34.2 °F 35.6 °F 87% 29.76 in 10.0 mi WSW 6.9 mph - N/A   Partly Cloudy
6:15 AM 39.2 °F 33.0 °F 35.6 °F 87% 29.77 in 10.0 mi WSW 9.2 mph - N/A   Partly Cloudy
6:35 AM 41.0 °F 35.8 °F 35.6 °F 81% 29.78 in 10.0 mi WSW 8.1 mph - N/A   Partly Cloudy
6:55 AM 41.0 °F 35.8 °F 35.6 °F 81% 29.78 in 10.0 mi WSW 8.1 mph - N/A   Partly Cloudy
7:15 AM 41.0 °F 36.4 °F 35.6 °F 81% 29.79 in 10.0 mi West 6.9 mph - N/A   Clear
7:35 AM 41.0 °F 37.1 °F 35.6 °F 81% 29.80 in 10.0 mi West 5.8 mph - N/A   Clear
7:55 AM 41.0 °F 39.0 °F 35.6 °F 81% 29.80 in 10.0 mi WNW 3.5 mph - N/A   Clear
8:15 AM 41.0 °F 36.4 °F 35.6 °F 81% 29.81 in 10.0 mi WNW 6.9 mph - N/A   Clear
8:35 AM 42.8 °F 39.3 °F 37.4 °F 81% 29.83 in 10.0 mi NW 5.8 mph - N/A   Clear
8:55 AM 44.6 °F 42.2 °F 37.4 °F 76% 29.83 in 10.0 mi NW 4.6 mph - N/A   Clear
9:15 AM 46.4 °F 42.9 °F 39.2 °F 76% 29.84 in 10.0 mi NW 6.9 mph - N/A   Clear
9:35 AM 48.2 °F - 37.4 °F 66% 29.84 in 10.0 mi West 9.2 mph - N/A   Clear
9:55 AM 48.2 °F - 37.4 °F 66% 29.85 in 10.0 mi West 5.8 mph - N/A   Clear
10:15 AM 50.0 °F - 37.4 °F 62% 29.86 in 10.0 mi West 9.2 mph - N/A   Clear
10:35 AM 53.6 °F - 37.4 °F 54% 29.86 in 10.0 mi NW 5.8 mph - N/A   Clear
10:55 AM 53.6 °F - 37.4 °F 54% 29.86 in 10.0 mi NW 4.6 mph - N/A   Clear
11:15 AM 55.4 °F - 33.8 °F 44% 29.85 in 10.0 mi West 6.9 mph - N/A   Clear
11:35 AM 57.2 °F - 33.8 °F 41% 29.84 in 10.0 mi WNW 5.8 mph - N/A   Clear
11:55 AM 59.0 °F - 32.0 °F 36% 29.84 in 10.0 mi NNE 5.8 mph - N/A   Clear
12:15 PM 59.0 °F - 30.2 °F 34% 29.82 in 10.0 mi NNW 8.1 mph - N/A   Clear
3:15 PM 59.0 °F - 23.0 °F 25% 29.84 in 10.0 mi NW 8.1 mph - N/A   Clear
3:35 PM 59.0 °F - 23.0 °F 25% 29.85 in 10.0 mi North 9.2 mph 17.3 mph N/A   Clear
3:55 PM 59.0 °F - 23.0 °F 25% 29.85 in 10.0 mi North 8.1 mph 16.1 mph N/A   Clear
4:15 PM 59.0 °F - 23.0 °F 25% 29.85 in 10.0 mi NNW 4.6 mph - N/A   Clear
4:35 PM 57.2 °F - 23.0 °F 27% 29.86 in 10.0 mi Calm Calm - N/A   Clear
4:55 PM 53.6 °F - 23.0 °F 30% 29.87 in 10.0 mi WSW 5.8 mph - N/A   Clear
5:15 PM 53.6 °F - 32.0 °F 44% 29.87 in 10.0 mi Calm Calm - N/A   Clear
5:35 PM 46.4 °F 45.2 °F 24.8 °F 43% 29.88 in 10.0 mi East 3.5 mph - N/A   Clear
5:55 PM 46.4 °F - 26.6 °F 46% 29.88 in 10.0 mi Calm Calm - N/A   Clear
6:15 PM 48.2 °F - 24.8 °F 40% 29.89 in 10.0 mi Calm Calm - N/A   Clear
6:35 PM 48.2 °F - 24.8 °F 40% 29.89 in 10.0 mi NNW 3.5 mph - N/A   Clear
6:55 PM 44.6 °F 43.1 °F 23.0 °F 43% 29.90 in 10.0 mi East 3.5 mph - N/A   Clear
7:15 PM 48.2 °F - 17.6 °F 30% 29.89 in 10.0 mi Calm Calm - N/A   Clear
7:35 PM 48.2 °F - 19.4 °F 32% 29.90 in 10.0 mi WSW 8.1 mph - N/A   Clear
7:55 PM 53.6 °F - 14.0 °F 21% 29.90 in 10.0 mi West 6.9 mph 18.4 mph N/A   Scattered Clouds
8:15 PM 51.8 °F - 15.8 °F 24% 29.91 in 10.0 mi West 6.9 mph - N/A   Partly Cloudy
8:55 PM 53.6 °F - 14.0 °F 21% 29.90 in 10.0 mi West 11.5 mph 19.6 mph N/A   Clear
9:15 PM 53.6 °F - 12.2 °F 19% 29.91 in 10.0 mi NE 6.9 mph - N/A   Clear
9:35 PM 53.6 °F - 14.0 °F 21% 29.91 in 10.0 mi WNW 10.4 mph 19.6 mph N/A   Clear
10:15 PM 50.0 °F - 12.2 °F 22% 29.93 in 10.0 mi North 3.5 mph 16.1 mph N/A   Clear
10:35 PM 50.0 °F - 10.4 °F 20% 29.94 in 10.0 mi NE 8.1 mph - N/A   Clear
10:55 PM 50.0 °F - 12.2 °F 22% 29.95 in 10.0 mi NNW 13.8 mph 20.7 mph N/A   Clear
11:15 PM 48.2 °F - 12.2 °F 24% 29.95 in 10.0 mi NW 3.5 mph - N/A   Clear
11:35 PM 50.0 °F - 12.2 °F 22% 29.95 in 10.0 mi SW 10.4 mph - N/A   Clear
11:55 PM 46.4 °F 41.5 °F 14.0 °F 27% 29.95 in 10.0 mi West 10.4 mph - N/A   Clear