Weather History for San Francisco, CA

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Wednesday, January 18, 2006

  Actual Average Record
Temperature  
Mean Temperature 54 °F 50 °F  
Max Temperature 58 °F 56 °F 68 °F (1948)
Min Temperature 49 °F 44 °F 30 °F (1947)
Degree Days  
Heating Degree Days 11 15  
Month to date heating degree days 227 270  
Since 1 July heating degree days 1105 1280  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 0 0  
Growing Degree Days 2 (Base 50)    
Moisture  
Dew Point 46 °F    
Average Humidity 80    
Maximum Humidity 93    
Minimum Humidity 66    
Precipitation  
Precipitation 0.08 in 0.13 in 1.82 in (1969)
Month to date precipitation 2.06 2.51  
Year to date precipitation 2.06 2.51  
Since 1 July precipitation 12.79 10.08  
Snow  
Snow 0.00 in - 0.00 in ()
Month to date snowfall 0.0  
Since 1 July snowfall 0.0  
Snow Depth 0.00 in    
Sea Level Pressure  
Sea Level Pressure 30.15 in    
Wind  
Wind Speed 10 mph (West)    
Max Wind Speed 30 mph    
Max Gust Speed 37 mph    
Visibility 9 miles    
Events Rain    
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Date:

Astronomy

Jan. 18, 2006 Rise Set
Actual Time 7:22 AM PST 5:18 PM PST
Civil Twilight 6:53 AM PST 5:46 PM PST
Nautical Twilight 6:21 AM PST 6:18 PM PST
Astronomical Twilight 5:50 AM PST 6:49 PM PST
Moon 9:32 PM PST (1/18) 9:49 AM PST (1/18)
Length of Visible Light 10h 52m
Length of Day
9h 55m
Waning Gibbous, 83% of the Moon is Illuminated
Jan 18
Waning Gibbous
Jan 22
Last Quarter
Jan 29
New
Feb 4
First Quarter
Feb 12
Full

Hourly Weather History & Observations

Time (PST) Temp. Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:52 AM 53.6 °F 50.0 °F 88% 30.14 in 10.0 mi West 6.9 mph - N/A   Overcast
12:56 AM 53.1 °F 50.0 °F 89% 30.14 in 10.0 mi WSW 6.9 mph - N/A   Overcast
1:56 AM 53.1 °F 48.9 °F 86% 30.14 in 10.0 mi SW 6.9 mph - N/A   Mostly Cloudy
2:56 AM 53.1 °F 48.9 °F 86% 30.14 in 10.0 mi SW 6.9 mph - N/A   Mostly Cloudy
3:56 AM 53.1 °F 48.9 °F 86% 30.13 in 10.0 mi WSW 6.9 mph - N/A   Mostly Cloudy
4:56 AM 53.1 °F 48.9 °F 86% 30.12 in 10.0 mi WSW 11.5 mph - N/A   Mostly Cloudy
5:56 AM 54.0 °F 48.9 °F 83% 30.11 in 10.0 mi WSW 15.0 mph - N/A   Mostly Cloudy
6:56 AM 54.0 °F 46.9 °F 77% 30.12 in 10.0 mi WSW 19.6 mph 26.5 mph 0.00 in   Overcast
7:56 AM 54.0 °F 46.0 °F 75% 30.13 in 9.0 mi West 15.0 mph - 0.00 in Rain Light Rain
8:56 AM 52.0 °F 46.9 °F 83% 30.15 in 10.0 mi WNW 10.4 mph - 0.02 in   Mostly Cloudy
9:56 AM 54.0 °F 46.9 °F 77% 30.16 in 10.0 mi West 16.1 mph - N/A   Mostly Cloudy
10:56 AM 55.0 °F 48.0 °F 77% 30.17 in 10.0 mi West 13.8 mph - N/A   Mostly Cloudy
11:56 AM 55.9 °F 46.9 °F 72% 30.15 in 10.0 mi WSW 15.0 mph 25.3 mph N/A   Mostly Cloudy
12:56 PM 51.1 °F 45.0 °F 80% 30.15 in 2.5 mi NW 19.6 mph 31.1 mph 0.02 in Rain Rain
1:07 PM 50.0 °F 44.6 °F 82% 30.15 in 3.0 mi WNW 11.5 mph - 0.03 in Rain Light Rain
1:56 PM 53.1 °F 46.9 °F 80% 30.14 in 10.0 mi SW 8.1 mph - 0.04 in Rain Light Rain
2:56 PM 55.0 °F 45.0 °F 69% 30.14 in 10.0 mi West 17.3 mph - 0.00 in   Mostly Cloudy
3:56 PM 55.0 °F 45.0 °F 69% 30.14 in 10.0 mi West 17.3 mph 26.5 mph N/A   Mostly Cloudy
4:56 PM 53.1 °F 44.1 °F 71% 30.15 in 10.0 mi West 12.7 mph - N/A   Mostly Cloudy
5:56 PM 52.0 °F 44.1 °F 74% 30.16 in 10.0 mi WSW 6.9 mph - N/A   Mostly Cloudy
6:56 PM 50.0 °F 41.0 °F 71% 30.17 in 10.0 mi West 5.8 mph - N/A   Scattered Clouds
7:56 PM 50.0 °F 45.0 °F 83% 30.18 in 10.0 mi Calm Calm - 0.00 in   Scattered Clouds
8:56 PM 50.0 °F 44.1 °F 80% 30.19 in 10.0 mi West 6.9 mph - N/A   Partly Cloudy
9:56 PM 50.0 °F 44.1 °F 80% 30.18 in 10.0 mi West 8.1 mph - N/A   Partly Cloudy
10:56 PM 48.9 °F 44.1 °F 83% 30.21 in 10.0 mi Calm Calm - N/A   Scattered Clouds
11:56 PM 50.0 °F 44.1 °F 80% 30.20 in 10.0 mi WNW 4.6 mph - N/A   Scattered Clouds