San Francisco, CA

3:08 AM PST on January 21, 2018 (GMT -0800)
San Francisco International

Weather History for KSFO - January, 1998

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Saturday, January 3, 1998

  Actual Average Record
Temperature  
Mean Temperature 54 °F 50 °F  
Max Temperature 57 °F 56 °F 69 °F (2000)
Min Temperature 51 °F 44 °F 31 °F (1950)
Degree Days  
Heating Degree Days 11 15  
Month to date heating degree days 45  
Since 1 July heating degree days 1055  
Cooling Degree Days 0 0  
Month to date cooling degree days 0  
Year to date cooling degree days 0  
Growing Degree Days 4 (Base 50)    
Moisture  
Dew Point 50 °F    
Average Humidity 89    
Maximum Humidity 100    
Minimum Humidity 64    
Precipitation  
Precipitation 0.43 in 0.13 in 1.33 in (1974)
Month to date precipitation 0.41  
Year to date precipitation 0.41  
Sea Level Pressure  
Sea Level Pressure 29.79 in    
Wind  
Wind Speed 10 mph (SSE)    
Max Wind Speed 24 mph    
Max Gust Speed 36 mph    
Visibility 9 miles    
Events Rain    
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Daily Weather History Graph

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Date:

Astronomy

Jan. 03, 1998 Rise Set
Actual Time 7:24 AM PST 5:03 PM PST
Civil Twilight 6:55 AM PST 5:32 PM PST
Nautical Twilight 6:22 AM PST 6:05 PM PST
Astronomical Twilight 5:51 AM PST 6:37 PM PST
Moon 10:54 AM PST (1/3) 10:55 PM PST (1/3)
Length of Visible Light 10h 37m
Length of Day
9h 38m
Waxing Crescent, 30% of the Moon is Illuminated
Jan 3
Waxing Crescent
Jan 5
First Quarter
Jan 12
Full
Jan 20
Last Quarter
Jan 27
New

Hourly Weather History & Observations

Time (PST) Temp. Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:10 AM 53.6 °F 51.8 °F 94% 29.81 in 5.0 mi ESE 5.8 mph - 0.01 in Rain Light Rain
12:19 AM 53.6 °F 51.8 °F 94% 29.81 in 5.0 mi SE 5.8 mph - 0.01 in Rain Light Rain
12:29 AM 51.8 °F 51.8 °F 100% 29.81 in 10.0 mi SSE 5.8 mph - 0.01 in   Overcast
12:44 AM 53.6 °F 51.8 °F 94% 29.81 in 9.0 mi SSE 4.6 mph - 0.02 in Rain Light Rain
12:56 AM 52.0 °F 52.0 °F 100% 29.81 in 10.0 mi South 8.1 mph - 0.02 in   Overcast
1:56 AM 52.0 °F 51.1 °F 97% 29.81 in 10.0 mi South 8.1 mph - 0.01 in   Mostly Cloudy
2:56 AM 51.1 °F 51.1 °F 100% 29.81 in 10.0 mi SE 8.1 mph - N/A   Scattered Clouds
3:56 AM 52.0 °F 51.1 °F 97% 29.80 in 10.0 mi SE 6.9 mph - 0.00 in   Drizzle
4:03 AM 51.8 °F 51.8 °F 100% 29.80 in 9.0 mi ESE 5.8 mph - 0.01 in Rain Light Rain
4:27 AM 51.8 °F 51.8 °F 100% 29.79 in 5.0 mi SE 5.8 mph - 0.03 in Rain Light Rain
4:56 AM 52.0 °F 51.1 °F 97% 29.80 in 10.0 mi ESE 8.1 mph - 0.03 in   Mostly Cloudy
5:56 AM 51.1 °F 50.0 °F 96% 29.81 in 10.0 mi ESE 8.1 mph - 0.00 in   Overcast
6:56 AM 51.1 °F 50.0 °F 96% 29.81 in 10.0 mi ESE 8.1 mph - N/A   Mostly Cloudy
7:56 AM 51.1 °F 50.0 °F 96% 29.82 in 10.0 mi ESE 9.2 mph - 0.01 in   Mostly Cloudy
8:56 AM 51.1 °F 51.1 °F 100% 29.84 in 9.0 mi East 6.9 mph - 0.00 in Rain Light Rain
9:56 AM 53.1 °F 51.1 °F 93% 29.84 in 10.0 mi East 11.5 mph - 0.00 in   Mostly Cloudy
10:56 AM 55.9 °F 48.9 °F 77% 29.83 in 10.0 mi South 15.0 mph 20.7 mph 0.00 in   Mostly Cloudy
11:56 AM 57.9 °F 48.9 °F 72% 29.82 in 10.0 mi South 21.9 mph 25.3 mph 0.00 in   Mostly Cloudy
12:56 PM 57.0 °F 45.0 °F 64% 29.80 in 10.0 mi South 18.4 mph 29.9 mph N/A   Mostly Cloudy
1:56 PM 57.0 °F 46.9 °F 69% 29.77 in 10.0 mi South 20.7 mph 27.6 mph N/A   Scattered Clouds
2:56 PM 57.9 °F 46.0 °F 65% 29.77 in 10.0 mi South 19.6 mph 24.2 mph N/A   Scattered Clouds
3:56 PM 55.9 °F 48.0 °F 75% 29.77 in 10.0 mi SSE 17.3 mph - N/A   Mostly Cloudy
4:56 PM 53.1 °F 48.9 °F 86% 29.77 in 7.0 mi SE 19.6 mph 26.5 mph 0.03 in Rain Light Rain
5:56 PM 52.0 °F 48.9 °F 89% 29.76 in 10.0 mi SE 12.7 mph - 0.03 in   Overcast
6:56 PM 52.0 °F 48.9 °F 89% 29.74 in 10.0 mi ESE 15.0 mph - 0.00 in Rain Light Rain
7:56 PM 53.1 °F 48.0 °F 83% 29.72 in 10.0 mi ESE 12.7 mph - 0.00 in Rain Light Rain
8:56 PM 54.0 °F 50.0 °F 86% 29.73 in 9.0 mi SSE 17.3 mph 25.3 mph 0.03 in Rain Light Rain
9:43 PM 53.6 °F 50.0 °F 88% 29.74 in 3.0 mi South 24.2 mph 35.7 mph 0.15 in Rain Heavy Rain
9:56 PM 54.0 °F 48.9 °F 83% 29.73 in 3.0 mi South 23.0 mph 32.2 mph 0.17 in Rain Light Rain
10:03 PM 53.6 °F 50.0 °F 88% 29.73 in 10.0 mi South 21.9 mph 32.2 mph 0.00 in Rain Light Rain
10:56 PM 53.1 °F 50.0 °F 89% 29.74 in 10.0 mi SSE 13.8 mph - 0.01 in Rain Light Rain
11:56 PM 52.0 °F 50.0 °F 93% 29.74 in 7.0 mi WSW 13.8 mph - 0.09 in Rain Light Rain