Weather History for San Francisco, CA

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Thursday, December 24, 1998

  Actual Average Record
Temperature  
Mean Temperature 38 °F 50 °F  
Max Temperature 45 °F 56 °F 65 °F (1967)
Min Temperature 32 °F 44 °F 29 °F (1990)
Degree Days  
Heating Degree Days 26 15  
Month to date heating degree days 340  
Since 1 July heating degree days 904  
Cooling Degree Days 0 0  
Month to date cooling degree days 0  
Year to date cooling degree days 164  
Moisture  
Dew Point 30 °F    
Average Humidity 71    
Maximum Humidity 83    
Minimum Humidity 58    
Precipitation  
Precipitation 0.00 in 0.15 in 2.00 in (1983)
Month to date precipitation 3.04  
Year to date precipitation 19.66  
Since 1 July precipitation 6.58  
Sea Level Pressure  
Sea Level Pressure 30.50 in    
Wind  
Wind Speed 5 mph (SE)    
Max Wind Speed 10 mph    
Max Gust Speed -    
Visibility 6 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Date:

Astronomy

Dec. 24, 1998 Rise Set
Actual Time 7:22 AM PST 4:56 PM PST
Civil Twilight 6:52 AM PST 5:25 PM PST
Nautical Twilight 6:19 AM PST 5:58 PM PST
Astronomical Twilight 5:48 AM PST 6:30 PM PST
Moon 11:20 AM PST (12/24) 10:55 PM PST (12/24)
Length of Visible Light 10h 32m
Length of Day
9h 33m
Waxing Crescent, 33% of the Moon is Illuminated
Dec 24
Waxing Crescent
Dec 26
First Quarter
Jan 1
Full
Jan 9
Last Quarter
Jan 17
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 35.1 °F 32.2 °F 24.1 °F 64% 30.44 in 10.0 mi Variable 3.5 mph - N/A   Clear
1:56 AM 32.0 °F 27.5 °F 23.0 °F 69% 30.47 in 10.0 mi SSE 4.6 mph - N/A   Clear
2:56 AM 32.0 °F 28.7 °F 24.1 °F 73% 30.48 in 10.0 mi SSW 3.5 mph - N/A   Clear
4:56 AM 33.1 °F 28.7 °F 27.0 °F 78% 30.46 in 9.0 mi SSE 4.6 mph - N/A   Clear
5:56 AM 34.0 °F 31.0 °F 27.0 °F 75% 30.48 in 9.0 mi South 3.5 mph - N/A   Clear
6:56 AM 33.1 °F 27.7 °F 27.0 °F 78% 30.49 in 10.0 mi SE 5.8 mph - N/A   Partly Cloudy
7:56 AM 32.0 °F 26.4 °F 26.1 °F 79% 30.51 in 8.0 mi SSE 5.8 mph - N/A   Scattered Clouds
9:56 AM 37.9 °F 30.9 °F 30.0 °F 73% 30.58 in 5.0 mi ENE 10.4 mph - N/A   Haze
10:56 AM 39.9 °F 33.9 °F 30.9 °F 70% 30.56 in 5.0 mi East 9.2 mph - N/A   Haze
11:56 AM 41.0 °F 38.0 °F 30.9 °F 67% 30.54 in 4.0 mi ESE 4.6 mph - N/A   Haze
12:56 PM 42.1 °F 40.2 °F 30.9 °F 65% 30.51 in 4.0 mi East 3.5 mph - N/A   Haze
1:56 PM 44.1 °F 41.5 °F 30.9 °F 60% 30.49 in 4.0 mi East 4.6 mph - N/A   Haze
2:56 PM 45.0 °F - 30.9 °F 58% 30.48 in 4.0 mi Calm Calm - N/A   Haze
3:56 PM 44.1 °F - 32.0 °F 63% 30.47 in 4.0 mi Calm Calm - N/A   Haze
5:56 PM 44.1 °F 40.1 °F 33.1 °F 65% 30.48 in 7.0 mi NNW 6.9 mph - N/A   Mostly Cloudy
6:56 PM 44.1 °F 39.0 °F 34.0 °F 68% 30.49 in 7.0 mi NNW 9.2 mph - N/A   Mostly Cloudy
7:56 PM 43.0 °F 38.8 °F 36.0 °F 76% 30.51 in 6.0 mi North 6.9 mph - N/A   Haze
8:56 PM 41.0 °F 36.4 °F 32.0 °F 70% 30.52 in 5.0 mi SSE 6.9 mph - N/A   Haze
9:56 PM 37.9 °F 32.7 °F 33.1 °F 83% 30.51 in 5.0 mi SSE 6.9 mph - N/A   Haze
10:56 PM 39.0 °F 36.8 °F 32.0 °F 76% 30.53 in 6.0 mi NNW 3.5 mph - N/A   Haze
11:56 PM 36.0 °F 31.1 °F 30.9 °F 82% 30.52 in 4.0 mi South 5.8 mph - N/A   Haze