San Francisco, CA

9:38 AM PDT on April 26, 2018 (GMT -0700)
San Francisco International

Weather History for KSFO - January, 1999

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Friday, January 29, 1999

  Actual Average Record
Temperature  
Mean Temperature 46 °F 51 °F  
Max Temperature 52 °F 58 °F 66 °F (2009)
Min Temperature 39 °F 45 °F 31 °F (1979)
Degree Days  
Heating Degree Days 20 14  
Month to date heating degree days 427  
Since 1 July heating degree days 1437  
Cooling Degree Days 0 0  
Month to date cooling degree days 0  
Year to date cooling degree days 0  
Moisture  
Dew Point 42 °F    
Average Humidity 88    
Maximum Humidity 100    
Minimum Humidity 66    
Precipitation  
Precipitation 0.00 in 0.13 in 1.57 in (1968)
Month to date precipitation 3.91  
Year to date precipitation 3.91  
Sea Level Pressure  
Sea Level Pressure 30.22 in    
Wind  
Wind Speed 3 mph (East)    
Max Wind Speed 9 mph    
Max Gust Speed -    
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. 29, 1999 Rise Set
Actual Time 7:15 AM PST 5:29 PM PST
Civil Twilight 6:48 AM PST 5:57 PM PST
Nautical Twilight 6:16 AM PST 6:29 PM PST
Astronomical Twilight 5:45 AM PST 7:00 PM PST
Moon 3:49 PM PST (1/29) 5:30 AM PST (1/29)
Length of Visible Light 11h 09m
Length of Day
10h 14m
Waxing Gibbous, 96% of the Moon is Illuminated
Jan 29
Waxing Gibbous
Jan 31
Full
Feb 8
Last Quarter
Feb 15
New
Feb 22
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 45.0 °F - 43.0 °F 93% 30.31 in 8.0 mi Calm Calm - N/A   Clear
1:56 AM 43.0 °F 41.3 °F 41.0 °F 93% 30.31 in 8.0 mi South 3.5 mph - N/A   Partly Cloudy
2:56 AM 42.1 °F - 41.0 °F 96% 30.30 in 8.0 mi Calm Calm - N/A   Partly Cloudy
3:56 AM 41.0 °F 39.0 °F 39.9 °F 96% 30.28 in 9.0 mi SE 3.5 mph - N/A   Partly Cloudy
4:56 AM 39.9 °F 37.8 °F 39.9 °F 100% 30.27 in 8.0 mi SE 3.5 mph - N/A   Mostly Cloudy
5:08 AM 42.8 °F 41.1 °F 41.0 °F 93% 30.27 in 8.0 mi SE 3.5 mph - N/A   Scattered Clouds
5:36 AM 42.8 °F 40.1 °F 41.0 °F 93% 30.26 in 8.0 mi East 4.6 mph - N/A   Mostly Cloudy
5:56 AM 39.9 °F 36.7 °F 39.0 °F 97% 30.26 in 7.0 mi SE 4.6 mph - N/A   Scattered Clouds
6:00 AM 39.2 °F 37.0 °F 39.2 °F 100% 30.26 in 7.0 mi SE 3.5 mph - N/A   Mostly Cloudy
6:27 AM 39.2 °F 35.0 °F 39.2 °F 100% 30.26 in 7.0 mi SE 5.8 mph - N/A   Scattered Clouds
6:56 AM 41.0 °F 37.1 °F 39.9 °F 96% 30.27 in 9.0 mi SE 5.8 mph - N/A   Scattered Clouds
7:56 AM 41.0 °F 36.4 °F 39.9 °F 96% 30.27 in 7.0 mi SE 6.9 mph - N/A   Scattered Clouds
8:56 AM 44.1 °F 42.5 °F 41.0 °F 89% 30.28 in 7.0 mi East 3.5 mph - N/A   Scattered Clouds
8:59 AM 44.6 °F 43.1 °F 41.0 °F 87% 30.28 in 7.0 mi Variable 3.5 mph - N/A   Mostly Cloudy
9:56 AM 45.0 °F 42.6 °F 42.1 °F 90% 30.29 in 5.0 mi ESE 4.6 mph - N/A   Overcast
10:35 AM 46.4 °F - 42.8 °F 87% 30.28 in 5.0 mi Calm Calm - N/A   Mostly Cloudy
10:56 AM 46.0 °F 44.8 °F 42.1 °F 86% 30.27 in 6.0 mi Variable 3.5 mph - N/A   Mostly Cloudy
11:56 AM 48.0 °F - 44.1 °F 86% 30.24 in 6.0 mi ENE 4.6 mph - N/A   Mostly Cloudy
12:56 PM 50.0 °F - 43.0 °F 77% 30.20 in 9.0 mi NNE 5.8 mph - N/A   Mostly Cloudy
1:56 PM 51.1 °F - 44.1 °F 77% 30.18 in 9.0 mi North 9.2 mph - N/A   Mostly Cloudy
2:56 PM 51.1 °F - 45.0 °F 80% 30.17 in 8.0 mi North 8.1 mph - N/A   Mostly Cloudy
3:56 PM 52.0 °F - 44.1 °F 74% 30.16 in 8.0 mi North 3.5 mph - N/A   Mostly Cloudy
4:56 PM 51.1 °F - 41.0 °F 68% 30.14 in 8.0 mi Calm Calm - N/A   Mostly Cloudy
5:56 PM 51.1 °F - 39.9 °F 66% 30.13 in 9.0 mi Calm Calm - N/A   Mostly Cloudy
6:56 PM 48.9 °F - 41.0 °F 74% 30.13 in 10.0 mi SE 3.5 mph - N/A   Mostly Cloudy
7:56 PM 50.0 °F - 44.1 °F 80% 30.13 in 8.0 mi Calm Calm - N/A   Mostly Cloudy
8:56 PM 48.9 °F - 45.0 °F 86% 30.12 in 8.0 mi North 6.9 mph - N/A   Mostly Cloudy
9:56 PM 48.9 °F - 45.0 °F 86% 30.12 in 6.0 mi North 5.8 mph - N/A   Haze
10:56 PM 48.0 °F - 45.0 °F 89% 30.11 in 6.0 mi NNE 4.6 mph - N/A   Haze
11:56 PM 44.1 °F 42.5 °F 42.1 °F 93% 30.10 in 6.0 mi South 3.5 mph - N/A   Haze