Weather History for Napa County, CA

Thursday, December 29, 2011 — View Current Weather Conditions
Thursday, December 29, 2011
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Daily Weekly Monthly Custom
  Actual Average Record
Temperature
Mean Temperature 48 °F 45 °F  
Max Temperature 59 °F 54 °F 62 °F (1999)
Min Temperature 37 °F 36 °F 27 °F (2009)
Degree Days
Heating Degree Days 17    
Month to date heating degree days 566  
Since 1 July heating degree days 1236  
Cooling Degree Days 0    
Month to date cooling degree days 0  
Year to date cooling degree days 175  
Moisture
Dew Point 46 °F    
Average Humidity 79    
Maximum Humidity 100    
Minimum Humidity 57    
Precipitation
Precipitation 0.00 in - 1.98 in (1981)
Month to date precipitation 0.13  
Year to date precipitation 19.40  
Since 1 July precipitation 3.55  
Sea Level Pressure
Sea Level Pressure 30.19 in    
Wind
Wind Speed 2 mph (SW)    
Max Wind Speed 12 mph    
Max Gust Speed 32 mph    
Visibility 3 miles    
Events Fog    
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary
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Local Photos
Misty
Road to the North Operations Center II
A foggy day at Pt. Reyes National Seashore, north of San Francisco, California.
Road to the North Operations Center
A foggy day at Pt. Reyes National Seashore, north of San Francisco, California. Can anyone give me some ideas on how to adjust this photo so it has ...
Trees lining the road to the North Operations Center
The non-street side of the trees lining the driveway into the North Operations Center in Point Reyes National Seashore. An unusual foggy day - normall...
The last rest stop on the lighthouse trail
Now we can really see the lighthouse, still many steps to go - but less than 100 at this point. Of course, we still have to go back up!!
Over half-way down the lighthouse trail
A foggy day at Pt. Reyes National Seashore, north of San Francisco, California. At last, we can make out the lighthouse!
The top of the lighthouse trail
A foggy day at Pt. Reyes National Seashore, north of San Francisco, California. The lighthouse sits about 40 stories below the visitor's center - over...
Pt. Reyes Lighthouse sign
A foggy day at Pt. Reyes National Seashore, north of San Francisco, California. Normally the fog is not a problem in the winter - mainly a summer issu...
On the fly
Detert Reservoir, Guenoc Valley, taken out the passenger window at 50 MPH.
Looking for Corn
6 Sand Hill cranes looking for Corn in a flooded field. The Cranes come from Alaska and Siberia to winter in the California Delta.
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Astronomy
Dec. 29, 2011 Rise Set
Actual Time 7:25 AM PST 4:57 PM PST
Civil Twilight 6:55 AM PST 5:26 PM PST
Nautical Twilight 6:22 AM PST 5:59 PM PST
Astronomical Twilight 5:50 AM PST 6:32 PM PST
Moon 10:25 AM PST (12/29) 10:34 PM PST (12/29)
Length Of Visible Light 10h 31m
Length of Day
9h 32m
Waxing Crescent, 27% of the Moon is Illuminated
Dec 29
Waxing Crescent
Dec 31
First Quarter
Jan 8
Full
Jan 16
Last Quarter
Jan 22
New
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Hourly Weather History & Observations
Time (PST) Temp. Windchill Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:54 AM 42.1 °F 40.2 °F 39.9 °F 92% 30.25 in 7.0 mi SE 3.5 mph - N/A   Clear
1:54 AM 41.0 °F - 39.0 °F 93% 30.25 in 5.0 mi Calm Calm - N/A   Partly Cloudy
2:05 AM 42.8 °F - 39.2 °F 87% 30.28 in 5.0 mi Calm Calm - N/A   Mostly Cloudy
2:22 AM 44.6 °F - 42.8 °F 93% 30.27 in 1.0 mi Calm Calm - N/A   Mist
2:24 AM 44.6 °F - 42.8 °F 93% 30.28 in 0.5 mi Calm Calm - N/A Fog Fog
3:18 AM 46.4 °F - 44.6 °F 93% 30.27 in 1.0 mi Calm Calm - N/A   Mist
3:23 AM 46.4 °F - 44.6 °F 93% 30.27 in 0.5 mi Calm Calm - N/A Fog Fog
3:54 AM 45.0 °F - 44.1 °F 97% 30.24 in 0.2 mi Calm Calm - N/A Fog Fog
4:54 AM 43.0 °F - 42.1 °F 97% 30.22 in 0.2 mi Calm Calm - N/A Fog Fog
5:02 AM 42.8 °F - 41.0 °F 93% 30.25 in 1.0 mi Calm Calm - N/A   Overcast
5:10 AM 42.8 °F - 39.2 °F 87% 30.25 in 3.0 mi Calm Calm - N/A   Overcast
5:20 AM 42.8 °F - 39.2 °F 87% 30.24 in 1.5 mi Calm Calm - N/A   Overcast
5:24 AM 42.8 °F - 41.0 °F 93% 30.24 in 0.5 mi Calm Calm - N/A Fog Fog
5:54 AM 39.9 °F - 39.0 °F 97% 30.21 in 0.8 mi Calm Calm - N/A   Mist
6:06 AM 37.4 °F - 37.4 °F 100% 30.23 in 0.2 mi Calm Calm - N/A Fog Fog
6:54 AM 39.0 °F - 37.9 °F 96% 30.21 in 0.2 mi Calm Calm - N/A Fog Fog
7:54 AM 44.1 °F - 43.0 °F 96% 30.21 in 0.2 mi Calm Calm - N/A Fog Fog
8:57 AM 46.4 °F - 44.6 °F 93% 30.25 in 1.0 mi Calm Calm - N/A   Mist
9:07 AM 46.4 °F - 46.4 °F 100% 30.25 in 0.2 mi Calm Calm - N/A Fog Fog
9:54 AM 48.9 °F - 48.9 °F 100% 30.25 in 0.2 mi Calm Calm - N/A Fog Fog
10:15 AM 48.2 °F - 48.2 °F 100% 30.28 in 0.2 mi West 3.5 mph - N/A Fog Fog
10:50 AM 51.8 °F - 50.0 °F 94% 30.26 in 1.0 mi SSW 3.5 mph - N/A   Overcast
10:54 AM 50.0 °F - 48.9 °F 96% 30.24 in 1.0 mi SSW 3.5 mph - N/A   Overcast
11:03 AM 50.0 °F - 48.2 °F 94% 30.26 in 3.0 mi South 3.5 mph - N/A   Overcast
11:54 AM 53.1 °F - 48.0 °F 83% 30.21 in 4.0 mi SSW 4.6 mph - N/A   Haze
1:06 PM 57.2 °F - 44.6 °F 63% 30.21 in 5.0 mi WSW 5.8 mph - N/A   Haze
1:54 PM 57.9 °F - 48.0 °F 70% 30.17 in 5.0 mi Calm Calm - N/A   Haze
2:54 PM 57.0 °F - 48.9 °F 74% 30.14 in 9.0 mi SSW 4.6 mph - N/A   Mostly Cloudy
3:01 PM 55.4 °F - 50.0 °F 82% 30.17 in 9.0 mi SSW 5.8 mph - N/A   Overcast
3:54 PM 55.9 °F - 51.1 °F 84% 30.14 in 10.0 mi SSW 4.6 mph - N/A   Overcast
4:54 PM 55.0 °F - 50.0 °F 83% 30.15 in 10.0 mi WSW 4.6 mph - N/A   Overcast
5:02 PM 55.4 °F - 51.8 °F 88% 30.18 in 10.0 mi SW 5.8 mph - N/A   Overcast
5:54 PM 55.0 °F - 51.1 °F 86% 30.14 in 10.0 mi SSW 5.8 mph - N/A   Overcast
6:54 PM 53.1 °F - 50.0 °F 89% 30.13 in 10.0 mi NW 5.8 mph - N/A   Scattered Clouds
7:01 PM 51.8 °F - 50.0 °F 94% 30.16 in 10.0 mi North 3.5 mph - N/A   Scattered Clouds
7:54 PM 48.0 °F - 46.9 °F 96% 30.11 in 0.5 mi Calm Calm - N/A Fog Fog
8:17 PM 46.4 °F 44.3 °F 44.6 °F 93% 30.14 in 0.8 mi WNW 4.6 mph - N/A   Mist
8:25 PM 46.4 °F 44.3 °F 46.4 °F 100% 30.14 in 0.2 mi West 4.6 mph - N/A Fog Fog
8:40 PM 48.2 °F - 46.4 °F 93% 30.13 in 0.5 mi Calm Calm - N/A Fog Fog
8:45 PM 48.2 °F - 48.2 °F 100% 30.13 in 1.2 mi Calm Calm - N/A   Partly Cloudy
8:54 PM 48.9 °F - 48.0 °F 97% 30.11 in 0.8 mi North 4.6 mph - N/A   Mist
8:58 PM 48.2 °F - 46.4 °F 93% 30.13 in 0.5 mi Calm Calm - N/A Fog Fog
9:11 PM 44.6 °F - 44.6 °F 100% 30.13 in 0.2 mi Calm Calm - N/A Fog Fog
9:35 PM 48.2 °F - 48.2 °F 100% 30.13 in 1.0 mi Calm Calm - N/A   Overcast
9:39 PM 48.2 °F - 48.2 °F 100% 30.13 in 3.0 mi Calm Calm - N/A   Overcast
9:54 PM 50.0 °F - 48.9 °F 96% 30.11 in 5.0 mi Calm Calm - N/A   Overcast
10:11 PM 51.8 °F - 50.0 °F 94% 30.13 in 6.0 mi Calm Calm - N/A   Overcast
10:54 PM 52.0 °F - 50.0 °F 93% 30.12 in 5.0 mi Calm Calm - N/A   Overcast
11:44 PM 51.8 °F - 51.8 °F 100% 30.13 in 7.0 mi Calm Calm - N/A   Overcast
11:54 PM 52.0 °F - 51.1 °F 97% 30.11 in 7.0 mi Calm Calm - N/A   Overcast
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