Weather History for San Francisco, CA

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Tuesday, December 4, 2012

  Actual Average Record
Temperature  
Mean Temperature 57 °F 52 °F  
Max Temperature 62 °F 58 °F 75 °F (1958)
Min Temperature 52 °F 46 °F 36 °F (2004)
Degree Days  
Heating Degree Days 8 13  
Month to date heating degree days 31 52  
Since 1 July heating degree days 626 616  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 86 164  
Growing Degree Days 8 (Base 50)    
Moisture  
Dew Point 50 °F    
Average Humidity 66    
Maximum Humidity 83    
Minimum Humidity 48    
Precipitation  
Precipitation T in 0.11 in 1.56 in (1945)
Month to date precipitation 1.74 0.43  
Year to date precipitation 16.96 17.05  
Since 1 July precipitation 6.50 3.97  
Sea Level Pressure  
Sea Level Pressure 30.19 in    
Wind  
Wind Speed 6 mph (SSE)    
Max Wind Speed 18 mph    
Max Gust Speed 24 mph    
Visibility 10 miles    
Events Rain    
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Date:

Astronomy

Dec. 04, 2012 Rise Set
Actual Time 7:08 AM PST 4:50 PM PST
Civil Twilight 6:39 AM PST 5:19 PM PST
Nautical Twilight 6:07 AM PST 5:52 PM PST
Astronomical Twilight 5:35 AM PST 6:24 PM PST
Moon 10:39 PM PST (12/4) 11:09 AM PST (12/4)
Length of Visible Light 10h 39m
Length of Day
9h 41m
Waning Gibbous, 68% of the Moon is Illuminated
Dec 4
Waning Gibbous
Dec 6
Last Quarter
Dec 13
New
Dec 19
First Quarter
Dec 28
Full

Hourly Weather History & Observations

Time (PST) Temp. Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:56 AM 52.0 °F 46.0 °F 80% 30.18 in 10.0 mi West 4.6 mph - N/A   Mostly Cloudy
1:56 AM 54.0 °F 46.9 °F 77% 30.20 in 10.0 mi West 5.8 mph - N/A   Mostly Cloudy
2:56 AM 55.0 °F 48.0 °F 77% 30.20 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
3:56 AM 55.9 °F 48.9 °F 77% 30.19 in 10.0 mi SSE 3.5 mph - N/A   Mostly Cloudy
4:56 AM 55.0 °F 48.9 °F 80% 30.18 in 10.0 mi SE 10.4 mph - N/A   Mostly Cloudy
5:56 AM 54.0 °F 48.9 °F 83% 30.20 in 10.0 mi SSE 6.9 mph - N/A   Mostly Cloudy
6:56 AM 54.0 °F 48.9 °F 83% 30.20 in 10.0 mi SSE 6.9 mph - N/A   Mostly Cloudy
7:56 AM 55.0 °F 48.9 °F 80% 30.21 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
8:56 AM 55.9 °F 50.0 °F 80% 30.22 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
9:56 AM 57.0 °F 50.0 °F 77% 30.23 in 10.0 mi ESE 8.1 mph - N/A   Mostly Cloudy
10:56 AM 57.9 °F 50.0 °F 75% 30.23 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
11:56 AM 57.9 °F 51.1 °F 78% 30.21 in 10.0 mi Calm Calm - N/A   Overcast
12:56 PM 57.9 °F 51.1 °F 78% 30.19 in 10.0 mi ENE 4.6 mph - N/A   Overcast
1:56 PM 59.0 °F 51.1 °F 75% 30.18 in 10.0 mi North 4.6 mph - N/A   Overcast
2:56 PM 59.0 °F 50.0 °F 72% 30.19 in 10.0 mi NW 3.5 mph - N/A   Mostly Cloudy
3:56 PM 61.0 °F 48.0 °F 62% 30.18 in 10.0 mi South 6.9 mph - N/A   Overcast
4:56 PM 62.1 °F 42.1 °F 48% 30.17 in 10.0 mi SSE 12.7 mph - N/A   Mostly Cloudy
5:56 PM 61.0 °F 48.0 °F 62% 30.18 in 10.0 mi SE 10.4 mph - N/A   Overcast
6:56 PM 60.1 °F 48.0 °F 64% 30.19 in 10.0 mi SE 4.6 mph - N/A   Overcast
7:56 PM 60.1 °F 50.0 °F 69% 30.17 in 10.0 mi SE 8.1 mph - N/A   Overcast
8:56 PM 61.0 °F 48.0 °F 62% 30.16 in 10.0 mi SSE 6.9 mph - N/A   Overcast
9:56 PM 60.1 °F 51.1 °F 72% 30.16 in 10.0 mi ESE 3.5 mph - N/A   Overcast
10:56 PM 61.0 °F 52.0 °F 72% 30.15 in 10.0 mi SE 6.9 mph 17.3 mph N/A   Overcast
11:21 PM 60.8 °F 53.6 °F 77% 30.15 in 9.0 mi South 15.0 mph 18.4 mph 0.00 in Rain Light Rain
11:44 PM 60.8 °F 55.4 °F 82% 30.14 in 9.0 mi South 16.1 mph 24.2 mph 0.00 in Rain Light Rain
11:56 PM 60.1 °F 55.9 °F 86% 30.14 in 9.0 mi SSE 13.8 mph - 0.00 in Rain Light Rain