San Francisco, CA

9:15 AM PDT on April 22, 2018 (GMT -0700)
San Francisco International

Weather History for KSFO - January, 2018

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Sunday, January 14, 2018

  Actual Average Record
Temperature  
Mean Temperature 52 °F 50 °F  
Max Temperature 56 °F 56 °F 72 °F (2014)
Min Temperature 48 °F 44 °F 31 °F (1963)
Degree Days  
Heating Degree Days 13 15  
Month to date heating degree days 150 210  
Since 1 July heating degree days 888 1220  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 0 0  
Growing Degree Days 2 (Base 50)    
Moisture  
Dew Point 47 °F    
Average Humidity 83    
Maximum Humidity 93    
Minimum Humidity 72    
Precipitation  
Precipitation 0.00 in 0.15 in 2.21 in (1979)
Month to date precipitation 4.06 1.97  
Year to date precipitation 4.06 1.97  
Sea Level Pressure  
Sea Level Pressure 30.14 in    
Wind  
Wind Speed 6 mph (East)    
Max Wind Speed 17 mph    
Max Gust Speed 19 mph    
Visibility 8 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

Daily Weather History Graph

Daily Weather History Graph

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Astronomy

Jan. 14, 2018 Rise Set
Actual Time 7:23 AM PST 5:14 PM PST
Civil Twilight 6:54 AM PST 5:42 PM PST
Nautical Twilight 6:22 AM PST 6:14 PM PST
Astronomical Twilight 5:51 AM PST 6:46 PM PST
Moon 5:24 AM PST (1/14) 3:35 PM PST (1/14)
Length of Visible Light 10h 47m
Length of Day
9h 50m
Waning Crescent, 5% of the Moon is Illuminated
Jan 14
Waning Crescent
Jan 16
New
Jan 24
First Quarter
Jan 31
Full
Feb 7
Last Quarter

Hourly Weather History & Observations

Time (PST) Temp. Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:34 AM 52.0 °F 46.9 °F 83% 30.18 in 10.0 mi East 13.8 mph - N/A   Partly Cloudy
12:56 AM 51.1 °F 46.9 °F 86% 30.18 in 10.0 mi East 12.7 mph - N/A   Partly Cloudy
1:56 AM 50.0 °F 46.0 °F 86% 30.17 in 9.0 mi ENE 13.8 mph - N/A   Clear
2:33 AM 51.1 °F 46.9 °F 86% 30.16 in 9.0 mi ENE 8.1 mph - N/A   Partly Cloudy
2:56 AM 51.1 °F 46.9 °F 86% 30.16 in 9.0 mi East 5.8 mph - N/A   Clear
3:10 AM 50.0 °F 46.9 °F 89% 30.15 in 8.0 mi SSE 3.5 mph - N/A   Partly Cloudy
3:56 AM 50.0 °F 46.0 °F 86% 30.14 in 7.0 mi ESE 5.8 mph - N/A   Partly Cloudy
4:14 AM 50.0 °F 46.9 °F 89% 30.14 in 7.0 mi East 6.9 mph - N/A   Mostly Cloudy
4:56 AM 48.9 °F 46.0 °F 90% 30.14 in 7.0 mi South 5.8 mph - N/A   Overcast
5:52 AM 50.0 °F 46.4 °F 87% 30.14 in 10.0 mi East 10.4 mph - N/A   Partly Cloudy
5:56 AM 50.0 °F 46.0 °F 86% 30.14 in 10.0 mi East 10.4 mph - N/A   Partly Cloudy
6:56 AM 50.0 °F 46.0 °F 86% 30.15 in 10.0 mi East 9.2 mph - N/A   Scattered Clouds
7:56 AM 48.9 °F 45.0 °F 86% 30.16 in 10.0 mi SE 5.8 mph - N/A   Scattered Clouds
8:56 AM 50.0 °F 46.9 °F 89% 30.17 in 9.0 mi ESE 5.8 mph - N/A   Mostly Cloudy
9:56 AM 51.1 °F 48.0 °F 89% 30.19 in 8.0 mi East 5.8 mph - N/A   Mostly Cloudy
10:56 AM 51.1 °F 46.9 °F 86% 30.19 in 8.0 mi East 5.8 mph - N/A   Mostly Cloudy
11:56 AM 54.0 °F 46.0 °F 75% 30.18 in 10.0 mi SE 5.8 mph - N/A   Mostly Cloudy
12:56 PM 55.9 °F 46.9 °F 72% 30.16 in 10.0 mi East 3.5 mph - N/A   Mostly Cloudy
1:56 PM 55.9 °F 46.9 °F 72% 30.12 in 10.0 mi ENE 3.5 mph - N/A   Overcast
2:56 PM 55.0 °F 48.0 °F 77% 30.12 in 10.0 mi Calm Calm - N/A   Overcast
3:56 PM 55.0 °F 48.9 °F 80% 30.12 in 10.0 mi NNE 4.6 mph - N/A   Overcast
4:56 PM 54.0 °F 48.0 °F 80% 30.11 in 6.0 mi ENE 6.9 mph - N/A   Haze
5:56 PM 54.0 °F 48.9 °F 83% 30.12 in 7.0 mi NNE 4.6 mph - N/A   Overcast
6:56 PM 54.0 °F 48.9 °F 83% 30.11 in 6.0 mi NNE 8.1 mph - N/A   Haze
7:56 PM 53.1 °F 48.9 °F 86% 30.09 in 7.0 mi ESE 3.5 mph - N/A   Overcast
8:56 PM 54.0 °F 48.9 °F 83% 30.07 in 7.0 mi SSE 9.2 mph - N/A   Overcast
9:56 PM 54.0 °F 48.0 °F 80% 30.11 in 8.0 mi SW 4.6 mph - N/A   Overcast
10:56 PM 54.0 °F 50.0 °F 86% 30.12 in 5.0 mi North 5.8 mph - N/A   Overcast
11:56 PM 52.0 °F 48.9 °F 89% 30.12 in 6.0 mi Calm Calm - N/A   Mostly Cloudy