Weather History for San Francisco, CA

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Friday, January 23, 2004

  Actual Average Record
Temperature  
Mean Temperature 47 °F 51 °F  
Max Temperature 52 °F 57 °F 71 °F (1948)
Min Temperature 42 °F 45 °F 31 °F (1949)
Degree Days  
Heating Degree Days 18 14  
Month to date heating degree days 343  
Since 1 July heating degree days 1353  
Cooling Degree Days 0 0  
Month to date cooling degree days 0  
Year to date cooling degree days 0  
Moisture  
Dew Point 44 °F    
Average Humidity 87    
Maximum Humidity 97    
Minimum Humidity 71    
Precipitation  
Precipitation 0.05 in 0.13 in 1.30 in (2000)
Month to date precipitation 3.13  
Year to date precipitation 3.13  
Since 1 July precipitation 10.70  
Sea Level Pressure  
Sea Level Pressure 30.17 in    
Wind  
Wind Speed 5 mph (NNE)    
Max Wind Speed 15 mph    
Max Gust Speed -    
Visibility 8 miles    
Events Rain    
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Date:

Astronomy

Jan. 23, 2004 Rise Set
Actual Time 7:19 AM PST 5:22 PM PST
Civil Twilight 6:51 AM PST 5:51 PM PST
Nautical Twilight 6:19 AM PST 6:22 PM PST
Astronomical Twilight 5:48 AM PST 6:54 PM PST
Moon 9:00 AM PST (1/23) 7:40 PM PST (1/23)
Length of Visible Light 10h 59m
Length of Day
10h 03m
Waxing Crescent, 5% of the Moon is Illuminated
Jan 23
Waxing Crescent
Jan 28
First Quarter
Feb 6
Full
Feb 13
Last Quarter
Feb 20
New

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 48.0 °F - 45.0 °F 89% 30.27 in 10.0 mi West 8.1 mph - N/A   Partly Cloudy
1:56 AM 46.9 °F - 44.1 °F 90% 30.26 in 10.0 mi WSW 4.6 mph - N/A   Partly Cloudy
2:56 AM 44.1 °F - 43.0 °F 96% 30.25 in 10.0 mi Calm Calm - N/A   Partly Cloudy
3:56 AM 44.1 °F 40.8 °F 43.0 °F 96% 30.24 in 10.0 mi SE 5.8 mph - N/A   Scattered Clouds
4:40 AM 42.8 °F 40.1 °F 41.0 °F 93% 30.23 in 10.0 mi SE 4.6 mph - N/A   Mostly Cloudy
4:56 AM 44.1 °F 41.5 °F 42.1 °F 93% 30.23 in 10.0 mi SE 4.6 mph - N/A   Mostly Cloudy
5:56 AM 44.1 °F - 42.1 °F 93% 30.23 in 10.0 mi Calm Calm - N/A   Overcast
6:07 AM 44.6 °F - 42.8 °F 93% 30.23 in 10.0 mi Calm Calm - N/A   Overcast
6:56 AM 46.9 °F - 43.0 °F 86% 30.24 in 10.0 mi Calm Calm - N/A   Overcast
7:56 AM 48.0 °F - 44.1 °F 86% 30.25 in 7.0 mi North 5.8 mph - N/A   Overcast
8:56 AM 48.0 °F - 43.0 °F 83% 30.24 in 6.0 mi ENE 4.6 mph - N/A   Haze
9:56 AM 48.9 °F - 44.1 °F 83% 30.24 in 6.0 mi NE 4.6 mph - N/A   Haze
10:56 AM 48.9 °F - 44.1 °F 83% 30.23 in 6.0 mi NE 4.6 mph - N/A   Haze
11:04 AM 48.2 °F - 44.6 °F 87% 30.22 in 5.0 mi NE 3.5 mph - N/A   Haze
11:56 AM 48.9 °F - 44.1 °F 83% 30.19 in 6.0 mi ENE 4.6 mph - N/A   Haze
12:56 PM 50.0 °F - 45.0 °F 83% 30.16 in 5.0 mi NE 3.5 mph - N/A   Haze
1:56 PM 52.0 °F - 45.0 °F 77% 30.13 in 5.0 mi North 5.8 mph - N/A   Haze
2:56 PM 52.0 °F - 43.0 °F 71% 30.11 in 7.0 mi Calm Calm - N/A   Mostly Cloudy
3:56 PM 51.1 °F - 44.1 °F 77% 30.10 in 6.0 mi Calm Calm - N/A   Haze
4:56 PM 51.1 °F - 46.0 °F 83% 30.09 in 8.0 mi West 15.0 mph - N/A   Mostly Cloudy
5:56 PM 50.0 °F - 46.0 °F 86% 30.09 in 8.0 mi West 10.4 mph - N/A   Mostly Cloudy
6:56 PM 50.0 °F - 45.0 °F 83% 30.09 in 8.0 mi West 10.4 mph - N/A   Mostly Cloudy
7:56 PM 50.0 °F - 46.0 °F 86% 30.09 in 9.0 mi West 4.6 mph - N/A   Mostly Cloudy
8:56 PM 50.0 °F - 46.9 °F 89% 30.09 in 7.0 mi West 8.1 mph - 0.02 in Rain Light Rain
9:56 PM 50.0 °F - 46.9 °F 89% 30.07 in 4.0 mi East 3.5 mph - 0.02 in Rain Light Rain
10:56 PM 48.9 °F - 48.0 °F 97% 30.06 in 6.0 mi SSE 4.6 mph - 0.01 in Rain Light Rain
11:56 PM 50.0 °F - 46.9 °F 89% 30.05 in 8.0 mi Calm Calm - 0.00 in   Mostly Cloudy