Weather History for Petaluma, CA

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Sunday, December 9, 2012

  Actual Average (KAPC) Record (KAPC)
Temperature  
Mean Temperature 52 °F 46 °F  
Max Temperature 66 °F 56 °F 70 °F (2012)
Min Temperature 37 °F 36 °F 19 °F (2013)
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  
Growing Degree Days 2 (Base 50)    
Moisture  
Dew Point 43 °F    
Average Humidity 84    
Maximum Humidity 100    
Minimum Humidity 49    
Precipitation  
Precipitation 0.00 in - 2.05 in (1992)
Month to date precipitation  
Year to date precipitation  
Since 1 July precipitation  
Sea Level Pressure  
Sea Level Pressure 30.15 in    
Wind  
Wind Speed 2 mph (NW)    
Max Wind Speed 9 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. 09, 2012 Rise Set
Actual Time 7:15 AM PST 4:50 PM PST
Civil Twilight 6:46 AM PST 5:19 PM PST
Nautical Twilight 6:13 AM PST 5:52 PM PST
Astronomical Twilight 5:41 AM PST 6:24 PM PST
Moon 2:57 AM PST (12/9) 1:58 PM PST (12/9)
Length of Visible Light 10h 33m
Length of Day
9h 34m
Waning Crescent, 17% of the Moon is Illuminated
Dec 9
Waning Crescent
Dec 13
New
Dec 19
First Quarter
Dec 28
Full
Jan 4
Last Quarter

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 37.0 °F 39.2 °F 100% 30.12 in 9.0 mi NNE 3.5 mph - N/A   Clear
12:35 AM 39.2 °F - 39.2 °F 100% 30.11 in 10.0 mi Calm Calm - N/A   Clear
12:55 AM 39.2 °F 35.9 °F 39.2 °F 100% 30.12 in 10.0 mi North 4.6 mph - N/A   Clear
1:15 AM 39.2 °F - 39.2 °F 100% 30.12 in 10.0 mi Calm Calm - N/A   Clear
1:35 AM 39.2 °F - 39.2 °F 100% 30.12 in 10.0 mi Calm Calm - N/A   Clear
1:55 AM 37.4 °F 34.9 °F 37.4 °F 100% 30.12 in 9.0 mi NE 3.5 mph - N/A   Clear
2:15 AM 39.2 °F - 39.2 °F 100% 30.12 in 10.0 mi Calm Calm - N/A   Clear
2:35 AM 37.4 °F 34.9 °F 37.4 °F 100% 30.12 in 10.0 mi NNW 3.5 mph - N/A   Clear
2:55 AM 37.4 °F - 37.4 °F 100% 30.13 in 10.0 mi Calm Calm - N/A   Clear
3:15 AM 39.2 °F - 39.2 °F 100% 30.13 in 10.0 mi Calm Calm - N/A   Clear
3:35 AM 39.2 °F 37.0 °F 39.2 °F 100% 30.13 in 10.0 mi NW 3.5 mph - N/A   Clear
3:55 AM 39.2 °F - 39.2 °F 100% 30.13 in 10.0 mi Calm Calm - N/A   Clear
4:15 AM 37.4 °F - 37.4 °F 100% 30.13 in 10.0 mi Calm Calm - N/A   Clear
4:35 AM 37.4 °F - 37.4 °F 100% 30.14 in 10.0 mi Calm Calm - N/A   Clear
4:55 AM 39.2 °F 37.0 °F 39.2 °F 100% 30.14 in 10.0 mi WNW 3.5 mph - N/A   Clear
5:15 AM 39.2 °F - 39.2 °F 100% 30.14 in 10.0 mi Calm Calm - N/A   Clear
5:35 AM 39.2 °F 35.9 °F 39.2 °F 100% 30.15 in 10.0 mi NNW 4.6 mph - N/A   Clear
5:55 AM 39.2 °F 35.9 °F 39.2 °F 100% 30.15 in 10.0 mi North 4.6 mph - N/A   Clear
6:35 AM 37.4 °F - 37.4 °F 100% 30.17 in 10.0 mi Calm Calm - N/A   Clear
6:55 AM 37.4 °F - 37.4 °F 100% 30.17 in 10.0 mi Calm Calm - N/A   Clear
7:15 AM 37.4 °F - 37.4 °F 100% 30.18 in 10.0 mi Calm Calm - N/A   Clear
7:35 AM 37.4 °F 34.9 °F 37.4 °F 100% 30.17 in 10.0 mi North 3.5 mph - N/A   Clear
7:55 AM 37.4 °F - 37.4 °F 100% 30.18 in 10.0 mi Calm Calm - N/A   Clear
8:15 AM 41.0 °F - 41.0 °F 100% 30.18 in 10.0 mi Calm Calm - N/A   Clear
8:35 AM 42.8 °F - 42.8 °F 100% 30.18 in 10.0 mi Calm Calm - N/A   Clear
8:55 AM 44.6 °F - 42.8 °F 93% 30.19 in 10.0 mi Calm Calm - N/A   Clear
9:15 AM 46.4 °F 45.2 °F 42.8 °F 87% 30.20 in 10.0 mi NW 3.5 mph - N/A   Clear
9:35 AM 48.2 °F - 42.8 °F 82% 30.20 in 10.0 mi West 4.6 mph - N/A   Clear
9:55 AM 48.2 °F - 42.8 °F 82% 30.20 in 10.0 mi WNW 3.5 mph - N/A   Clear
10:15 AM 50.0 °F - 42.8 °F 76% 30.21 in 10.0 mi NNW 3.5 mph - N/A   Clear
10:35 AM 53.6 °F - 44.6 °F 72% 30.20 in 10.0 mi Calm Calm - N/A   Clear
10:55 AM 53.6 °F - 44.6 °F 72% 30.19 in 10.0 mi Calm Calm - N/A   Clear
11:15 AM 55.4 °F - 44.6 °F 67% 30.19 in 10.0 mi WNW 3.5 mph - N/A   Clear
11:35 AM 57.2 °F - 44.6 °F 63% 30.18 in 10.0 mi Calm Calm - N/A   Clear
11:55 AM 59.0 °F - 46.4 °F 63% 30.17 in 10.0 mi NW 3.5 mph - N/A   Clear
12:35 PM 62.6 °F - 46.4 °F 55% 30.15 in 10.0 mi NW 4.6 mph - N/A   Clear
12:55 PM 62.6 °F - 46.4 °F 55% 30.14 in 10.0 mi NW 4.6 mph - N/A   Clear
1:15 PM 64.4 °F - 46.4 °F 52% 30.13 in 10.0 mi WNW 5.8 mph - N/A   Clear
1:35 PM 66.2 °F - 48.2 °F 52% 30.12 in 10.0 mi WNW 3.5 mph - N/A   Clear
1:55 PM 66.2 °F - 48.2 °F 52% 30.12 in 10.0 mi WSW 5.8 mph - N/A   Clear
2:15 PM 66.2 °F - 46.4 °F 49% 30.12 in 10.0 mi NW 5.8 mph - N/A   Clear
2:35 PM 66.2 °F - 46.4 °F 49% 30.11 in 10.0 mi West 6.9 mph - N/A   Clear
2:55 PM 66.2 °F - 46.4 °F 49% 30.11 in 10.0 mi WSW 8.1 mph - N/A   Clear
3:15 PM 66.2 °F - 46.4 °F 49% 30.11 in 10.0 mi West 9.2 mph - N/A   Clear
3:35 PM 66.2 °F - 50.0 °F 56% 30.11 in 10.0 mi WSW 6.9 mph - N/A   Clear
3:55 PM 66.2 °F - 50.0 °F 56% 30.12 in 10.0 mi SSW 6.9 mph - N/A   Clear
4:15 PM 64.4 °F - 50.0 °F 59% 30.12 in 10.0 mi WSW 5.8 mph - N/A   Clear
4:35 PM 62.6 °F - 48.2 °F 59% 30.12 in 10.0 mi Calm Calm - N/A   Clear
4:55 PM 59.0 °F - 48.2 °F 67% 30.12 in 10.0 mi Calm Calm - N/A   Clear
5:15 PM 55.4 °F - 48.2 °F 77% 30.13 in 10.0 mi Calm Calm - N/A   Clear
5:35 PM 55.4 °F - 48.2 °F 77% 30.14 in 10.0 mi Calm Calm - N/A   Clear
5:55 PM 53.6 °F - 48.2 °F 82% 30.14 in 10.0 mi Calm Calm - N/A   Clear
6:35 PM 50.0 °F - 46.4 °F 87% 30.15 in 10.0 mi ENE 4.6 mph - N/A   Clear
6:55 PM 50.0 °F - 44.6 °F 82% 30.15 in 10.0 mi SE 3.5 mph - N/A   Clear
7:15 PM 50.0 °F - 44.6 °F 82% 30.15 in 10.0 mi Calm Calm - N/A   Clear
7:35 PM 50.0 °F - 46.4 °F 87% 30.16 in 10.0 mi ENE 3.5 mph - N/A   Clear
7:55 PM 48.2 °F - 44.6 °F 87% 30.16 in 10.0 mi East 3.5 mph - N/A   Clear
8:15 PM 46.4 °F - 44.6 °F 93% 30.16 in 10.0 mi Calm Calm - N/A   Clear
8:35 PM 46.4 °F - 44.6 °F 93% 30.17 in 10.0 mi Calm Calm - N/A   Clear
8:55 PM 46.4 °F - 44.6 °F 93% 30.17 in 10.0 mi Calm Calm - N/A   Clear
9:15 PM 44.6 °F 43.1 °F 42.8 °F 93% 30.17 in 10.0 mi NE 3.5 mph - N/A   Clear
9:35 PM 44.6 °F 43.1 °F 44.6 °F 100% 30.18 in 10.0 mi West 3.5 mph - N/A   Clear
9:55 PM 44.6 °F 42.2 °F 42.8 °F 93% 30.18 in 10.0 mi NNE 4.6 mph - N/A   Clear
10:15 PM 42.8 °F - 41.0 °F 93% 30.18 in 10.0 mi Calm Calm - N/A   Clear
10:35 PM 44.6 °F - 44.6 °F 100% 30.19 in 10.0 mi Calm Calm - N/A   Clear
10:55 PM 44.6 °F - 42.8 °F 93% 30.19 in 10.0 mi Calm Calm - N/A   Clear
11:15 PM 42.8 °F - 41.0 °F 93% 30.19 in 10.0 mi Calm Calm - N/A   Clear
11:55 PM 41.0 °F - 41.0 °F 100% 30.19 in 10.0 mi Calm Calm - N/A   Clear