Weather History for Petaluma, CA

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Friday, December 20, 2013

  Actual Average (KAPC) Record (KAPC)
Temperature  
Mean Temperature 47 °F 45 °F  
Max Temperature 64 °F 55 °F 67 °F (1999)
Min Temperature 30 °F 36 °F 25 °F (2008)
Degree Days  
Heating Degree Days 18    
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  
Growing Degree Days 0 (Base 50)    
Moisture  
Dew Point 27 °F    
Average Humidity 53    
Maximum Humidity 87    
Minimum Humidity 18    
Precipitation  
Precipitation 0.00 in - 2.15 in (1955)
Month to date precipitation  
Year to date precipitation  
Since 1 July precipitation  
Sea Level Pressure  
Sea Level Pressure 29.99 in    
Wind  
Wind Speed 4 mph (NW)    
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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Astronomy

Dec. 20, 2013 Rise Set
Actual Time 7:23 AM PST 4:53 PM PST
Civil Twilight 6:53 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 8:16 PM PST 9:22 AM PST
Length of Visible Light 10h 29m
Length of Day
9h 30m
Waning Gibbous, 90% of the Moon is Illuminated
Dec 20
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 46.4 °F 42.4 °F 17.6 °F 32% 29.95 in 10.0 mi WSW 8.1 mph - N/A   Clear
12:35 AM 44.6 °F 40.2 °F 23.0 °F 43% 29.95 in 10.0 mi West 8.1 mph - N/A   Clear
12:55 AM 44.6 °F 42.2 °F 24.8 °F 46% 29.96 in 10.0 mi NNW 4.6 mph - N/A   Clear
1:15 AM 39.2 °F 37.0 °F 23.0 °F 52% 29.96 in 10.0 mi NNE 3.5 mph - N/A   Clear
1:35 AM 39.2 °F 37.0 °F 24.8 °F 56% 29.95 in 10.0 mi WNW 3.5 mph - N/A   Clear
1:55 AM 37.4 °F 33.8 °F 24.8 °F 60% 29.96 in 10.0 mi NNW 4.6 mph - N/A   Clear
2:15 AM 35.6 °F - 24.8 °F 65% 29.97 in 10.0 mi Calm Calm - N/A   Clear
2:55 AM 32.0 °F - 23.0 °F 69% 29.97 in 10.0 mi Calm Calm - N/A   Clear
3:15 AM 32.0 °F - 23.0 °F 69% 29.98 in 10.0 mi Calm Calm - N/A   Clear
3:35 AM 32.0 °F - 23.0 °F 69% 29.96 in 10.0 mi Calm Calm - N/A   Clear
3:55 AM 32.0 °F - 23.0 °F 69% 29.97 in 10.0 mi Calm Calm - N/A   Clear
4:15 AM 32.0 °F - 23.0 °F 69% 29.97 in 10.0 mi Calm Calm - N/A   Clear
4:35 AM 30.2 °F - 21.2 °F 69% 29.98 in 10.0 mi Calm Calm - N/A   Clear
4:55 AM 32.0 °F - 23.0 °F 69% 29.98 in 10.0 mi Calm Calm - N/A   Clear
5:15 AM 32.0 °F - 24.8 °F 75% 29.97 in 10.0 mi Calm Calm - N/A   Clear
5:35 AM 35.6 °F 32.8 °F 23.0 °F 60% 29.98 in 10.0 mi West 3.5 mph - N/A   Clear
5:55 AM 32.0 °F - 23.0 °F 69% 29.99 in 10.0 mi Calm Calm - N/A   Clear
6:15 AM 30.2 °F - 23.0 °F 75% 29.98 in 10.0 mi Calm Calm - N/A   Clear
6:35 AM 32.0 °F - 23.0 °F 69% 29.99 in 10.0 mi Calm Calm - N/A   Clear
6:55 AM 32.0 °F - 23.0 °F 69% 29.99 in 10.0 mi Calm Calm - N/A   Clear
7:15 AM 32.0 °F - 23.0 °F 69% 29.99 in 10.0 mi Calm Calm - N/A   Clear
7:35 AM 30.2 °F - 23.0 °F 75% 30.00 in 10.0 mi Calm Calm - N/A   Clear
7:55 AM 32.0 °F - 23.0 °F 69% 30.01 in 10.0 mi Calm Calm - N/A   Clear
8:15 AM 32.0 °F - 23.0 °F 69% 30.02 in 10.0 mi Calm Calm - N/A   Clear
8:35 AM 35.6 °F - 24.8 °F 65% 30.02 in 10.0 mi Calm Calm - N/A   Clear
8:55 AM 39.2 °F - 26.6 °F 61% 30.03 in 10.0 mi Calm Calm - N/A   Clear
9:15 AM 42.8 °F 41.1 °F 28.4 °F 57% 30.03 in 10.0 mi NW 3.5 mph - N/A   Clear
9:35 AM 46.4 °F 42.9 °F 26.6 °F 46% 30.03 in 10.0 mi NW 6.9 mph - N/A   Clear
9:55 AM 48.2 °F - 24.8 °F 40% 30.03 in 10.0 mi NNW 6.9 mph - N/A   Clear
10:15 AM 48.2 °F - 24.8 °F 40% 30.04 in 10.0 mi NNW 4.6 mph - N/A   Clear
10:35 AM 50.0 °F - 24.8 °F 37% 30.04 in 10.0 mi NW 5.8 mph - N/A   Clear
10:55 AM 53.6 °F - 24.8 °F 33% 30.03 in 10.0 mi NNW 5.8 mph - N/A   Clear
11:15 AM 55.4 °F - 23.0 °F 29% 30.02 in 10.0 mi WNW 5.8 mph - N/A   Clear
11:35 AM 55.4 °F - 23.0 °F 29% 30.01 in 10.0 mi WNW 5.8 mph - N/A   Clear
11:55 AM 57.2 °F - 23.0 °F 27% 29.99 in 10.0 mi WNW 6.9 mph - N/A   Clear
12:15 PM 59.0 °F - 23.0 °F 25% 29.99 in 10.0 mi NW 5.8 mph - N/A   Clear
12:35 PM 60.8 °F - 23.0 °F 23% 29.98 in 10.0 mi NW 4.6 mph - N/A   Clear
12:55 PM 60.8 °F - 23.0 °F 23% 29.99 in 10.0 mi WNW 4.6 mph - N/A   Clear
1:15 PM 62.6 °F - 23.0 °F 22% 29.98 in 10.0 mi NW 5.8 mph - N/A   Clear
1:35 PM 64.4 °F - 21.2 °F 19% 29.98 in 10.0 mi WNW 6.9 mph - N/A   Clear
1:55 PM 64.4 °F - 19.4 °F 18% 29.97 in 10.0 mi WNW 8.1 mph - N/A   Clear
2:15 PM 64.4 °F - 19.4 °F 18% 29.97 in 10.0 mi NW 5.8 mph - N/A   Clear
2:35 PM 64.4 °F - 26.6 °F 24% 29.97 in 10.0 mi West 10.4 mph - N/A   Clear
2:55 PM 64.4 °F - 23.0 °F 21% 29.98 in 10.0 mi West 10.4 mph - N/A   Clear
3:15 PM 62.6 °F - 23.0 °F 22% 29.98 in 10.0 mi West 8.1 mph - N/A   Clear
3:35 PM 62.6 °F - 24.8 °F 24% 29.98 in 10.0 mi West 8.1 mph - N/A   Clear
3:55 PM 62.6 °F - 26.6 °F 26% 29.98 in 10.0 mi West 8.1 mph - N/A   Clear
4:15 PM 60.8 °F - 24.8 °F 25% 29.98 in 10.0 mi West 6.9 mph - N/A   Clear
4:35 PM 59.0 °F - 26.6 °F 29% 29.97 in 10.0 mi WNW 3.5 mph - N/A   Clear
4:55 PM 55.4 °F - 26.6 °F 33% 29.97 in 10.0 mi NNW 4.6 mph - N/A   Clear
5:15 PM 53.6 °F - 26.6 °F 35% 29.97 in 10.0 mi NNW 3.5 mph - N/A   Clear
5:35 PM 53.6 °F - 28.4 °F 38% 29.97 in 10.0 mi NW 4.6 mph - N/A   Clear
5:55 PM 51.8 °F - 32.0 °F 47% 29.98 in 10.0 mi WNW 5.8 mph - N/A   Clear
6:15 PM 48.2 °F - 28.4 °F 46% 29.98 in 10.0 mi NW 4.6 mph - N/A   Clear
6:35 PM 46.4 °F 44.3 °F 30.2 °F 53% 29.99 in 10.0 mi NW 4.6 mph - N/A   Clear
6:55 PM 46.4 °F 44.3 °F 32.0 °F 57% 30.00 in 10.0 mi North 4.6 mph - N/A   Partly Cloudy
7:15 PM 44.6 °F 42.2 °F 32.0 °F 61% 30.00 in 10.0 mi WNW 4.6 mph - N/A   Mostly Cloudy
7:35 PM 44.6 °F 42.2 °F 35.6 °F 71% 30.01 in 10.0 mi NW 4.6 mph - N/A   Mostly Cloudy
7:55 PM 44.6 °F 43.1 °F 35.6 °F 71% 30.01 in 10.0 mi NW 3.5 mph - N/A   Scattered Clouds
8:15 PM 41.0 °F - 35.6 °F 81% 30.00 in 10.0 mi Calm Calm - N/A   Scattered Clouds
8:35 PM 44.6 °F 43.1 °F 35.6 °F 71% 30.00 in 10.0 mi North 3.5 mph - N/A   Mostly Cloudy
8:55 PM 44.6 °F 43.1 °F 35.6 °F 71% 30.00 in 10.0 mi NW 3.5 mph - N/A   Scattered Clouds
9:15 PM 42.8 °F 38.6 °F 35.6 °F 76% 30.01 in 10.0 mi West 6.9 mph - N/A   Clear
9:35 PM 42.8 °F 41.1 °F 35.6 °F 76% 30.00 in 10.0 mi ESE 3.5 mph - N/A   Scattered Clouds
9:55 PM 41.0 °F - 35.6 °F 81% 30.00 in 10.0 mi Calm Calm - N/A   Overcast
10:15 PM 41.0 °F 39.0 °F 37.4 °F 87% 30.01 in 10.0 mi NW 3.5 mph - N/A   Mostly Cloudy
10:35 PM 44.6 °F 40.7 °F 37.4 °F 76% 30.00 in 10.0 mi WNW 6.9 mph - N/A   Scattered Clouds
10:55 PM 42.8 °F 41.1 °F 37.4 °F 81% 30.00 in 10.0 mi WSW 3.5 mph - N/A   Mostly Cloudy
11:15 PM 41.0 °F - 37.4 °F 87% 30.00 in 10.0 mi Calm Calm - N/A   Overcast
11:35 PM 41.0 °F - 37.4 °F 87% 30.01 in 10.0 mi Calm Calm - N/A   Overcast
11:55 PM 39.2 °F - 35.6 °F 87% 30.01 in 10.0 mi Calm Calm - N/A   Overcast