Weather History for San Francisco, CA

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Wednesday, January 1, 2003

  Actual Average Record
Temperature  
Mean Temperature 48 °F 50 °F  
Max Temperature 52 °F 56 °F 68 °F (1996)
Min Temperature 43 °F 44 °F 31 °F (1952)
Degree Days  
Heating Degree Days 18 15  
Month to date heating degree days 15  
Since 1 July heating degree days 1025  
Cooling Degree Days 0 0  
Month to date cooling degree days 0  
Year to date cooling degree days 0  
Moisture  
Dew Point 46 °F    
Average Humidity 90    
Maximum Humidity 100    
Minimum Humidity 80    
Precipitation  
Precipitation 0.00 in 0.14 in 2.16 in (2004)
Month to date precipitation 0.14  
Year to date precipitation 0.14  
Since 1 July precipitation 7.71  
Sea Level Pressure  
Sea Level Pressure 30.28 in    
Wind  
Wind Speed 2 mph (East)    
Max Wind Speed 9 mph    
Max Gust Speed -    
Visibility 9 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Date:

Astronomy

Jan. 01, 2003 Rise Set
Actual Time 7:24 AM PST 5:01 PM PST
Civil Twilight 6:55 AM PST 5:30 PM PST
Nautical Twilight 6:22 AM PST 6:03 PM PST
Astronomical Twilight 5:50 AM PST 6:35 PM PST
Moon 6:26 AM PST (1/1) 3:58 PM PST (1/1)
Length of Visible Light 10h 35m
Length of Day
9h 37m
Waning Crescent, 1% of the Moon is Illuminated
Jan 1
Waning Crescent
Jan 2
New
Jan 10
First Quarter
Jan 18
Full
Jan 25
Last Quarter

Hourly Weather History & Observations

Time (PST) Temp. Windchill Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:56 AM 46.9 °F - 45.0 °F 93% 30.30 in 10.0 mi Calm Calm - N/A   Partly Cloudy
1:56 AM 44.1 °F 42.5 °F 43.0 °F 96% 30.30 in 10.0 mi WSW 3.5 mph - N/A   Partly Cloudy
2:56 AM 45.0 °F - 44.1 °F 97% 30.30 in 10.0 mi Calm Calm - N/A   Partly Cloudy
3:56 AM 44.1 °F - 43.0 °F 96% 30.31 in 10.0 mi Calm Calm - N/A   Partly Cloudy
4:56 AM 45.0 °F - 44.1 °F 97% 30.31 in 10.0 mi Calm Calm - N/A   Partly Cloudy
5:56 AM 43.0 °F - 43.0 °F 100% 30.31 in 10.0 mi Calm Calm - N/A   Partly Cloudy
6:56 AM 44.1 °F 41.5 °F 44.1 °F 100% 30.32 in 10.0 mi South 4.6 mph - N/A   Scattered Clouds
7:56 AM 45.0 °F 41.8 °F 44.1 °F 97% 30.33 in 6.0 mi SE 5.8 mph - N/A   Scattered Clouds
8:56 AM 46.9 °F - 45.0 °F 93% 30.35 in 5.0 mi SSE 3.5 mph - N/A   Mostly Cloudy
9:56 AM 48.9 °F - 45.0 °F 86% 30.35 in 5.0 mi East 4.6 mph - N/A   Scattered Clouds
10:56 AM 48.9 °F - 46.0 °F 90% 30.33 in 6.0 mi NNE 3.5 mph - N/A   Scattered Clouds
11:56 AM 48.9 °F - 46.0 °F 90% 30.30 in 10.0 mi NNE 5.8 mph - N/A   Scattered Clouds
12:56 PM 50.0 °F - 45.0 °F 83% 30.27 in 10.0 mi Calm Calm - N/A   Scattered Clouds
1:56 PM 52.0 °F - 46.9 °F 83% 30.26 in 10.0 mi Calm Calm - N/A   Scattered Clouds
2:56 PM 52.0 °F - 46.9 °F 83% 30.25 in 10.0 mi Calm Calm - N/A   Scattered Clouds
3:56 PM 52.0 °F - 48.0 °F 86% 30.25 in 10.0 mi ENE 3.5 mph - N/A   Scattered Clouds
4:56 PM 52.0 °F - 48.9 °F 89% 30.25 in 10.0 mi East 3.5 mph - N/A   Mostly Cloudy
5:56 PM 52.0 °F - 50.0 °F 93% 30.23 in 10.0 mi East 3.5 mph - N/A   Mostly Cloudy
6:56 PM 51.1 °F - 48.9 °F 92% 30.25 in 10.0 mi North 4.6 mph - N/A   Scattered Clouds
7:56 PM 52.0 °F - 48.0 °F 86% 30.25 in 10.0 mi NE 9.2 mph - N/A   Scattered Clouds
8:56 PM 52.0 °F - 46.0 °F 80% 30.24 in 10.0 mi ENE 9.2 mph - N/A   Scattered Clouds
9:56 PM 50.0 °F - 46.0 °F 86% 30.26 in 10.0 mi Calm Calm - N/A   Scattered Clouds
10:56 PM 48.9 °F - 46.0 °F 90% 30.23 in 9.0 mi SSE 5.8 mph - N/A   Scattered Clouds
11:56 PM 50.0 °F - 45.0 °F 83% 30.25 in 10.0 mi Calm Calm - N/A   Scattered Clouds