Weather History for San Francisco, CA

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Sunday, January 24, 1999

  Actual Average Record
Temperature  
Mean Temperature 44 °F 51 °F  
Max Temperature 52 °F 57 °F 72 °F (1948)
Min Temperature 36 °F 45 °F 31 °F (1962)
Degree Days  
Heating Degree Days 21 14  
Month to date heating degree days 357  
Since 1 July heating degree days 1367  
Cooling Degree Days 0 0  
Month to date cooling degree days 0  
Year to date cooling degree days 0  
Moisture  
Dew Point 34 °F    
Average Humidity 67    
Maximum Humidity 82    
Minimum Humidity 50    
Precipitation  
Precipitation 0.00 in 0.13 in 1.72 in (2000)
Month to date precipitation 3.26  
Year to date precipitation 3.26  
Since 1 July precipitation 10.83  
Sea Level Pressure  
Sea Level Pressure 30.03 in    
Wind  
Wind Speed 5 mph (West)    
Max Wind Speed 16 mph    
Max Gust Speed -    
Visibility 10 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Date:

Astronomy

Jan. 24, 1999 Rise Set
Actual Time 7:19 AM PST 5:24 PM PST
Civil Twilight 6:51 AM PST 5:52 PM PST
Nautical Twilight 6:19 AM PST 6:24 PM PST
Astronomical Twilight 5:48 AM PST 6:55 PM PST
Moon 11:45 AM PST (1/24) 12:04 AM PST (1/24)
Length of Visible Light 11h 01m
Length of Day
10h 05m
Waxing Crescent, 50% of the Moon is Illuminated
Jan 24
Waxing Crescent
Jan 31
Full
Feb 8
Last Quarter
Feb 15
New
Feb 22
First 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 42.1 °F 39.2 °F 33.1 °F 70% 30.10 in 10.0 mi West 4.6 mph - N/A   Clear
1:56 AM 39.0 °F 35.7 °F 32.0 °F 76% 30.11 in 10.0 mi South 4.6 mph - N/A   Clear
2:56 AM 37.9 °F 34.4 °F 30.9 °F 76% 30.11 in 10.0 mi SW 4.6 mph - N/A   Partly Cloudy
3:56 AM 37.0 °F 33.3 °F 30.9 °F 79% 30.11 in 10.0 mi SW 4.6 mph - N/A   Scattered Clouds
4:56 AM 39.0 °F - 30.0 °F 70% 30.11 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
5:56 AM 36.0 °F 31.1 °F 30.9 °F 82% 30.10 in 10.0 mi South 5.8 mph - N/A   Mostly Cloudy
6:56 AM 37.9 °F - 30.9 °F 76% 30.11 in 10.0 mi Calm Calm - N/A   Partly Cloudy
7:56 AM 39.0 °F - 32.0 °F 76% 30.13 in 10.0 mi Calm Calm - N/A   Scattered Clouds
8:56 AM 43.0 °F 38.8 °F 32.0 °F 65% 30.14 in 10.0 mi North 6.9 mph - N/A   Scattered Clouds
9:56 AM 45.0 °F 40.1 °F 32.0 °F 60% 30.14 in 10.0 mi North 9.2 mph - N/A   Scattered Clouds
10:56 AM 46.0 °F 42.5 °F 34.0 °F 63% 30.13 in 10.0 mi North 6.9 mph - N/A   Scattered Clouds
11:56 AM 46.0 °F 43.1 °F 34.0 °F 63% 30.10 in 10.0 mi North 5.8 mph - N/A   Scattered Clouds
12:56 PM 48.0 °F - 34.0 °F 58% 30.06 in 10.0 mi Calm Calm - N/A   Scattered Clouds
1:56 PM 48.9 °F - 34.0 °F 56% 30.03 in 10.0 mi NE 3.5 mph - N/A   Scattered Clouds
2:56 PM 52.0 °F - 34.0 °F 50% 30.00 in 10.0 mi Variable 3.5 mph - N/A   Scattered Clouds
3:56 PM 50.0 °F - 35.1 °F 57% 29.99 in 10.0 mi West 16.1 mph - N/A   Scattered Clouds
4:56 PM 48.9 °F - 34.0 °F 56% 29.98 in 10.0 mi West 16.1 mph - N/A   Scattered Clouds
5:56 PM 46.9 °F - 36.0 °F 66% 29.96 in 10.0 mi West 12.7 mph - N/A   Scattered Clouds
6:56 PM 46.9 °F - 33.1 °F 59% 29.93 in 10.0 mi West 11.5 mph - N/A   Scattered Clouds
7:56 PM 46.0 °F 41.9 °F 36.0 °F 68% 29.91 in 10.0 mi West 8.1 mph - N/A   Mostly Cloudy
8:56 PM 46.9 °F - 37.0 °F 68% 29.90 in 10.0 mi West 6.9 mph - N/A   Scattered Clouds
9:56 PM 46.9 °F - 37.0 °F 68% 29.89 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
10:56 PM 46.0 °F - 36.0 °F 68% 29.88 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
11:56 PM 46.0 °F 43.9 °F 37.9 °F 73% 29.88 in 10.0 mi SSE 4.6 mph - N/A   Overcast