San Francisco, CA

1:01 AM PDT on March 30, 2017 (GMT -0700)
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Weather History for KSFO - December, 1998

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Saturday, December 5, 1998

  Actual Average Record
Temperature  
Mean Temperature 46 °F 52 °F  
Max Temperature 52 °F 58 °F 69 °F (1979)
Min Temperature 39 °F 46 °F 31 °F (1972)
Degree Days  
Heating Degree Days 20 13  
Month to date heating degree days 65  
Since 1 July heating degree days 629  
Cooling Degree Days 0 0  
Month to date cooling degree days 0  
Year to date cooling degree days 164  
Moisture  
Dew Point 39 °F    
Average Humidity 74    
Maximum Humidity 94    
Minimum Humidity 59    
Precipitation  
Precipitation 0.31 in 0.11 in 1.39 in (1952)
Month to date precipitation 0.54  
Year to date precipitation 17.16  
Sea Level Pressure  
Sea Level Pressure 30.17 in    
Wind  
Wind Speed 9 mph (SW)    
Max Wind Speed 39 mph    
Max Gust Speed 51 mph    
Visibility 9 miles    
Events Rain    
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Date:

Astronomy

Dec. 05, 1998 Rise Set
Actual Time 7:09 AM PST 4:50 PM PST
Civil Twilight 6:40 AM PST 5:19 PM PST
Nautical Twilight 6:07 AM PST 5:52 PM PST
Astronomical Twilight 5:36 AM PST 6:24 PM PST
Moon 7:24 PM PST (12/5) 9:04 AM PST (12/5)
Length of Visible Light 10h 39m
Length of Day
9h 41m
Waning Gibbous, 93% of the Moon is Illuminated
Dec 5
Waning Gibbous
Dec 10
Last Quarter
Dec 18
New
Dec 26
First Quarter
Jan 1
Full

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 45.0 °F 41.8 °F 35.1 °F 68% 30.19 in 10.0 mi West 5.8 mph - N/A   Partly Cloudy
1:56 AM 46.9 °F - 33.1 °F 59% 30.19 in 10.0 mi NW 8.1 mph - N/A   Clear
2:56 AM 43.0 °F 37.7 °F 30.0 °F 60% 30.23 in 10.0 mi West 9.2 mph - N/A   Clear
3:56 AM 41.0 °F 38.0 °F 30.9 °F 67% 30.23 in 10.0 mi SW 4.6 mph - N/A   Clear
4:56 AM 43.0 °F 41.3 °F 34.0 °F 71% 30.24 in 10.0 mi WSW 3.5 mph - N/A   Clear
5:56 AM 39.9 °F 35.8 °F 37.0 °F 89% 30.25 in 10.0 mi SSE 5.8 mph - N/A   Clear
6:56 AM 41.0 °F 39.0 °F 36.0 °F 82% 30.26 in 10.0 mi ESE 3.5 mph - N/A   Partly Cloudy
7:56 AM 39.0 °F 36.8 °F 36.0 °F 89% 30.27 in 10.0 mi SSW 3.5 mph - N/A   Partly Cloudy
8:56 AM 46.0 °F - 37.9 °F 73% 30.28 in 10.0 mi Calm Calm - N/A   Partly Cloudy
9:56 AM 48.9 °F - 39.9 °F 71% 30.32 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
10:56 AM 51.1 °F - 39.0 °F 63% 30.30 in 10.0 mi West 13.8 mph - N/A   Mostly Cloudy
11:56 AM 51.1 °F - 41.0 °F 68% 30.28 in 10.0 mi WSW 9.2 mph - N/A   Overcast
12:56 PM 51.1 °F - 42.1 °F 71% 30.25 in 10.0 mi West 6.9 mph - N/A   Overcast
1:56 PM 52.0 °F - 41.0 °F 66% 30.23 in 10.0 mi SSW 8.1 mph - N/A   Overcast
2:56 PM 52.0 °F - 42.1 °F 69% 30.20 in 10.0 mi South 9.2 mph - N/A   Overcast
3:56 PM 50.0 °F - 43.0 °F 77% 30.16 in 10.0 mi SSE 11.5 mph - 0.00 in Rain Light Rain
4:56 PM 50.0 °F - 43.0 °F 77% 30.11 in 10.0 mi SSE 13.8 mph - 0.00 in   Overcast
5:56 PM 48.0 °F - 44.1 °F 86% 30.06 in 8.0 mi SSE 16.1 mph - 0.01 in Rain Light Rain
6:35 PM 48.2 °F - 46.4 °F 93% 29.99 in 5.0 mi South 23.0 mph 32.2 mph 0.05 in   Overcast
6:56 PM 50.0 °F - 46.9 °F 89% 29.99 in 3.0 mi South 26.5 mph 35.7 mph 0.09 in   Overcast
7:30 PM 50.0 °F - 48.2 °F 94% 30.02 in 3.0 mi WNW 39.1 mph 50.6 mph 0.19 in Rain Heavy Rain
7:56 PM 50.0 °F - 45.0 °F 83% 30.04 in 10.0 mi West 20.7 mph 28.8 mph 0.21 in Rain Light Rain
8:56 PM 50.0 °F - 39.9 °F 68% 30.07 in 10.0 mi West 17.3 mph 27.6 mph 0.00 in   Mostly Cloudy
9:56 PM 48.0 °F - 39.0 °F 71% 30.10 in 10.0 mi WNW 12.7 mph - N/A   Scattered Clouds
10:56 PM 48.0 °F - 37.0 °F 66% 30.11 in 10.0 mi West 20.7 mph 26.5 mph N/A   Partly Cloudy
11:56 PM 48.0 °F - 37.0 °F 66% 30.11 in 10.0 mi West 19.6 mph 29.9 mph N/A   Partly Cloudy