San Francisco, CA

10:00 AM PDT on June 23, 2017 (GMT -0700)
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Weather History for KSFO - January, 2003

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Friday, January 17, 2003

  Actual Average Record
Temperature  
Mean Temperature 51 °F 50 °F  
Max Temperature 59 °F 56 °F 70 °F (1991)
Min Temperature 43 °F 44 °F 32 °F (1947)
Degree Days  
Heating Degree Days 14 15  
Month to date heating degree days 255  
Since 1 July heating degree days 1265  
Cooling Degree Days 0 0  
Month to date cooling degree days 0  
Year to date cooling degree days 0  
Growing Degree Days 1 (Base 50)    
Moisture  
Dew Point 47 °F    
Average Humidity 84    
Maximum Humidity 93    
Minimum Humidity 67    
Precipitation  
Precipitation 0.00 in 0.14 in 1.06 in (1973)
Month to date precipitation 2.38  
Year to date precipitation 2.38  
Sea Level Pressure  
Sea Level Pressure 30.16 in    
Wind  
Wind Speed 2 mph (ENE)    
Max Wind Speed 8 mph    
Max Gust Speed -    
Visibility 10 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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Date:

Astronomy

Jan. 17, 2003 Rise Set
Actual Time 7:22 AM PST 5:16 PM PST
Civil Twilight 6:54 AM PST 5:45 PM PST
Nautical Twilight 6:22 AM PST 6:17 PM PST
Astronomical Twilight 5:50 AM PST 6:48 PM PST
Moon 4:36 PM PST (1/17) 7:04 AM PST (1/17)
Length of Visible Light 10h 51m
Length of Day
9h 54m
Full, 100% of the Moon is Illuminated
Jan 17
Full
Jan 18
Full
Jan 25
Last Quarter
Feb 1
New
Feb 9
First Quarter

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 48.0 °F - 44.1 °F 86% 30.20 in 10.0 mi Calm Calm - N/A   Clear
1:56 AM 48.0 °F - 44.1 °F 86% 30.19 in 10.0 mi Calm Calm - N/A   Clear
2:56 AM 46.0 °F - 41.0 °F 83% 30.19 in 10.0 mi Calm Calm - N/A   Clear
3:56 AM 46.9 °F - 44.1 °F 90% 30.18 in 10.0 mi Calm Calm - N/A   Clear
4:56 AM 43.0 °F 41.3 °F 39.9 °F 89% 30.17 in 10.0 mi South 3.5 mph - N/A   Clear
5:56 AM 46.9 °F - 43.0 °F 86% 30.18 in 10.0 mi Calm Calm - N/A   Clear
6:56 AM 45.0 °F 43.5 °F 42.1 °F 90% 30.19 in 10.0 mi SSE 3.5 mph - N/A   Partly Cloudy
7:56 AM 46.9 °F - 44.1 °F 90% 30.19 in 10.0 mi SE 4.6 mph - N/A   Partly Cloudy
8:56 AM 50.0 °F - 45.0 °F 83% 30.20 in 10.0 mi East 3.5 mph - N/A   Partly Cloudy
9:56 AM 53.1 °F - 46.9 °F 80% 30.21 in 10.0 mi East 4.6 mph - N/A   Partly Cloudy
10:56 AM 54.0 °F - 48.0 °F 80% 30.19 in 10.0 mi ENE 4.6 mph - N/A   Partly Cloudy
11:56 AM 55.0 °F - 48.9 °F 80% 30.17 in 10.0 mi NNE 4.6 mph - N/A   Partly Cloudy
12:56 PM 55.9 °F - 48.9 °F 77% 30.13 in 10.0 mi NNE 3.5 mph - N/A   Partly Cloudy
1:56 PM 55.9 °F - 48.9 °F 77% 30.10 in 10.0 mi Calm Calm - N/A   Partly Cloudy
2:56 PM 57.9 °F - 50.0 °F 75% 30.09 in 10.0 mi North 4.6 mph - N/A   Partly Cloudy
3:56 PM 57.0 °F - 50.0 °F 77% 30.09 in 10.0 mi Calm Calm - N/A   Partly Cloudy
4:56 PM 59.0 °F - 48.0 °F 67% 30.11 in 10.0 mi Calm Calm - N/A   Scattered Clouds
5:56 PM 55.9 °F - 51.1 °F 84% 30.12 in 10.0 mi Calm Calm - N/A   Scattered Clouds
6:56 PM 54.0 °F - 52.0 °F 93% 30.13 in 10.0 mi North 8.1 mph - N/A   Scattered Clouds
7:56 PM 54.0 °F - 50.0 °F 86% 30.14 in 10.0 mi Calm Calm - N/A   Scattered Clouds
8:56 PM 52.0 °F - 48.9 °F 89% 30.14 in 10.0 mi SE 3.5 mph - N/A   Scattered Clouds
9:56 PM 53.1 °F - 48.9 °F 86% 30.15 in 8.0 mi Calm Calm - N/A   Scattered Clouds
10:56 PM 52.0 °F - 48.9 °F 89% 30.16 in 8.0 mi Calm Calm - N/A   Scattered Clouds
11:56 PM 52.0 °F - 50.0 °F 93% 30.16 in 7.0 mi North 8.1 mph - N/A   Scattered Clouds