San Francisco, CA

2:20 AM PST on January 18, 2018 (GMT -0800)
San Francisco International

Weather History for KSFO - January, 2015

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Monday, January 12, 2015

  Actual Average Record
Temperature  
Mean Temperature 55 °F 50 °F  
Max Temperature 62 °F 56 °F 70 °F (2009)
Min Temperature 47 °F 44 °F 32 °F (1963)
Degree Days  
Heating Degree Days 10 15  
Month to date heating degree days 163 180  
Since 1 July heating degree days 598 1190  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 0 0  
Growing Degree Days 4 (Base 50)    
Moisture  
Dew Point 51 °F    
Average Humidity 89    
Maximum Humidity 100    
Minimum Humidity 78    
Precipitation  
Precipitation 0.00 in 0.14 in 1.56 in (1993)
Month to date precipitation 0.00 1.68  
Year to date precipitation 0.00 1.68  
Since 1 July precipitation 13.38  
Sea Level Pressure  
Sea Level Pressure 30.22 in    
Wind  
Wind Speed 4 mph (WNW)    
Max Wind Speed 18 mph    
Max Gust Speed 22 mph    
Visibility 7 miles    
Events Fog    
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. 12, 2015 Rise Set
Actual Time 7:24 AM PST 5:11 PM PST
Civil Twilight 6:55 AM PST 5:40 PM PST
Nautical Twilight 6:23 AM PST 6:12 PM PST
Astronomical Twilight 5:51 AM PST 6:44 PM PST
Moon No Moon Rise 11:20 AM PST (1/12)
Length of Visible Light 10h 45m
Length of Day
9h 47m
Waning Gibbous, 55% of the Moon is Illuminated
Jan 12
Waning Gibbous
Jan 13
Last Quarter
Jan 20
New
Jan 26
First Quarter
Feb 3
Full

Hourly Weather History & Observations

Time (PST) Temp. Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:56 AM 51.1 °F 51.1 °F 100% 30.19 in 10.0 mi Calm Calm - N/A   Partly Cloudy
1:56 AM 48.9 °F 48.9 °F 100% 30.20 in 10.0 mi Calm Calm - N/A   Clear
2:56 AM 48.9 °F 48.9 °F 100% 30.20 in 10.0 mi Calm Calm - N/A   Clear
3:56 AM 48.9 °F 48.0 °F 97% 30.22 in 10.0 mi Calm Calm - N/A   Partly Cloudy
4:56 AM 48.0 °F 48.0 °F 100% 30.21 in 10.0 mi Calm Calm - N/A   Partly Cloudy
5:56 AM 50.0 °F 50.0 °F 100% 30.22 in 10.0 mi Calm Calm - N/A   Scattered Clouds
6:56 AM 48.9 °F 48.9 °F 100% 30.22 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
7:39 AM 50.0 °F 50.0 °F 100% 30.22 in 8.0 mi Calm Calm - N/A   Overcast
7:56 AM 51.1 °F 51.1 °F 100% 30.23 in 8.0 mi Calm Calm - N/A   Overcast
8:27 AM 51.8 °F 51.8 °F 100% 30.25 in 3.0 mi Calm Calm - N/A   Overcast
8:42 AM 50.0 °F 50.0 °F 100% 30.26 in 0.2 mi Calm Calm - N/A Fog Fog
8:56 AM 51.1 °F 51.1 °F 100% 30.26 in 0.5 mi Calm Calm - N/A Fog Fog
9:13 AM 50.0 °F 50.0 °F 100% 30.27 in 0.2 mi Calm Calm - N/A Fog Fog
9:30 AM 51.8 °F 51.8 °F 100% 30.27 in 0.1 mi Calm Calm - N/A Fog Fog
9:56 AM 50.0 °F 50.0 °F 100% 30.28 in 0.1 mi Calm Calm - N/A Fog Fog
10:56 AM 50.0 °F 50.0 °F 100% 30.27 in 0.2 mi Calm Calm - N/A Fog Fog
11:33 AM 50.0 °F 50.0 °F 100% 30.26 in 0.2 mi Calm Calm - N/A Fog Fog
11:56 AM 51.1 °F 51.1 °F 100% 30.25 in 6.0 mi NE 3.5 mph - N/A   Mostly Cloudy
12:56 PM 51.1 °F 51.1 °F 100% 30.22 in 8.0 mi Calm Calm - N/A   Scattered Clouds
1:56 PM 55.9 °F 54.0 °F 93% 30.21 in 9.0 mi East 4.6 mph - N/A   Scattered Clouds
2:56 PM 57.0 °F 52.0 °F 83% 30.21 in 10.0 mi Calm Calm - N/A   Scattered Clouds
3:56 PM 61.0 °F 53.1 °F 75% 30.20 in 10.0 mi West 11.5 mph - N/A   Scattered Clouds
4:56 PM 57.9 °F 55.0 °F 90% 30.20 in 10.0 mi West 16.1 mph - N/A   Scattered Clouds
5:56 PM 55.9 °F 55.0 °F 97% 30.20 in 10.0 mi West 17.3 mph - N/A   Mostly Cloudy
6:56 PM 55.9 °F 55.0 °F 97% 30.20 in 10.0 mi West 16.1 mph - N/A   Mostly Cloudy
7:56 PM 55.0 °F 55.0 °F 100% 30.20 in 10.0 mi West 15.0 mph - N/A   Mostly Cloudy
8:56 PM 55.0 °F 54.0 °F 96% 30.20 in 10.0 mi WNW 8.1 mph - N/A   Scattered Clouds
9:56 PM 54.0 °F 53.1 °F 97% 30.20 in 10.0 mi NW 3.5 mph - N/A   Partly Cloudy
10:56 PM 52.0 °F 50.0 °F 93% 30.20 in 10.0 mi Calm Calm - N/A   Clear
11:56 PM 52.0 °F 51.1 °F 97% 30.20 in 10.0 mi West 4.6 mph - N/A   Clear