Weather History for KSFO - March, 2013

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Wednesday, March 20, 2013

  Actual Average Record
Temperature  
Mean Temperature 56 °F 55 °F  
Max Temperature 62 °F 62 °F 78 °F (2004)
Min Temperature 50 °F 48 °F 38 °F (1952)
Degree Days  
Heating Degree Days 9 10  
Month to date heating degree days 216 207  
Since 1 July heating degree days 2100 2013  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 0 0  
Growing Degree Days 6 (Base 50)    
Moisture  
Dew Point 49 °F    
Average Humidity 77    
Maximum Humidity 93    
Minimum Humidity 60    
Precipitation  
Precipitation 0.01 in 0.09 in 1.51 in (1958)
Month to date precipitation 0.31 2.13  
Year to date precipitation 1.18 10.38  
Since 1 July precipitation 12.18  
Sea Level Pressure  
Sea Level Pressure 30.12 in    
Wind  
Wind Speed 9 mph (WSW)    
Max Wind Speed 21 mph    
Max Gust Speed 24 mph    
Visibility 9 miles    
Events Fog , Rain    
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Date:

Astronomy

Mar. 20, 2013 Rise Set
Actual Time 7:12 AM PDT 7:21 PM PDT
Civil Twilight 6:46 AM PDT 7:47 PM PDT
Nautical Twilight 6:15 AM PDT 8:18 PM PDT
Astronomical Twilight 5:44 AM PDT 8:49 PM PDT
Moon 1:07 PM PDT (3/20) 2:50 AM PDT (3/20)
Length of Visible Light 13h 01m
Length of Day
12h 09m
First Quarter, 60% of the Moon is Illuminated
Mar 20
First Quarter
Mar 27
Full
Apr 2
Last Quarter
Apr 10
New
Apr 18
First Quarter

Hourly Weather History & Observations

Time (PDT) Temp. Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:56 AM 51.1 °F 44.1 °F 77% 30.11 in 10.0 mi Calm Calm - N/A   Overcast
1:56 AM 51.1 °F 45.0 °F 80% 30.12 in 10.0 mi West 9.2 mph - 0.01 in   Overcast
2:56 AM 52.0 °F 46.0 °F 80% 30.10 in 10.0 mi NW 9.2 mph - 0.00 in   Overcast
3:56 AM 52.0 °F 46.0 °F 80% 30.10 in 10.0 mi Calm Calm - N/A   Overcast
4:56 AM 52.0 °F 46.9 °F 83% 30.09 in 10.0 mi SSW 3.5 mph - 0.00 in   Overcast
5:56 AM 52.0 °F 46.9 °F 83% 30.08 in 10.0 mi ESE 4.6 mph - N/A   Mostly Cloudy
6:56 AM 52.0 °F 46.9 °F 83% 30.09 in 10.0 mi Calm Calm - N/A   Overcast
7:56 AM 53.1 °F 48.0 °F 83% 30.09 in 10.0 mi SE 6.9 mph - N/A   Overcast
8:56 AM 55.0 °F 48.0 °F 77% 30.10 in 10.0 mi East 4.6 mph - N/A   Overcast
9:56 AM 57.0 °F 48.0 °F 72% 30.11 in 10.0 mi SSE 5.8 mph - N/A   Overcast
10:56 AM 60.1 °F 46.0 °F 60% 30.10 in 10.0 mi South 11.5 mph - N/A   Mostly Cloudy
11:56 AM 61.0 °F 48.0 °F 62% 30.11 in 10.0 mi South 12.7 mph 20.7 mph N/A   Overcast
12:24 PM 60.8 °F 48.2 °F 63% 30.12 in 10.0 mi South 12.7 mph - N/A   Overcast
12:56 PM 60.1 °F 48.9 °F 67% 30.12 in 10.0 mi SSW 11.5 mph 21.9 mph N/A   Overcast
1:48 PM 57.2 °F 50.0 °F 77% 30.11 in 10.0 mi SSW 12.7 mph - N/A   Mostly Cloudy
1:56 PM 59.0 °F 50.0 °F 72% 30.11 in 10.0 mi SSW 10.4 mph - N/A   Overcast
2:56 PM 59.0 °F 51.1 °F 75% 30.11 in 9.0 mi SSW 10.4 mph - N/A   Overcast
3:56 PM 59.0 °F 51.1 °F 75% 30.11 in 9.0 mi WSW 11.5 mph - 0.00 in Fog Overcast
4:23 PM 57.2 °F 53.6 °F 88% 30.11 in 4.0 mi WSW 10.4 mph - N/A Fog Haze
4:37 PM 57.2 °F 51.8 °F 82% 30.11 in 7.0 mi WSW 12.7 mph - N/A Fog Overcast
4:56 PM 59.0 °F 51.1 °F 75% 30.10 in 10.0 mi WSW 12.7 mph - N/A   Mostly Cloudy
5:56 PM 57.0 °F 51.1 °F 81% 30.11 in 10.0 mi West 10.4 mph - N/A   Overcast
6:56 PM 57.0 °F 50.0 °F 77% 30.12 in 9.0 mi West 8.1 mph - N/A Fog Overcast
7:10 PM 55.4 °F 51.8 °F 88% 30.12 in 4.0 mi West 10.4 mph - 0.00 in Fog , Rain Light Rain
7:56 PM 54.0 °F 51.1 °F 90% 30.13 in 8.0 mi WNW 11.5 mph - 0.00 in   Overcast
8:48 PM 53.6 °F 50.0 °F 88% 30.14 in 10.0 mi WNW 6.9 mph - N/A   Overcast
8:56 PM 54.0 °F 50.0 °F 86% 30.15 in 10.0 mi WNW 6.9 mph - N/A   Overcast
9:56 PM 53.1 °F 50.0 °F 89% 30.15 in 10.0 mi West 11.5 mph - N/A   Overcast
10:40 PM 51.8 °F 48.2 °F 88% 30.16 in 10.0 mi West 10.4 mph - N/A   Overcast
10:56 PM 52.0 °F 48.9 °F 89% 30.16 in 10.0 mi WNW 9.2 mph - N/A   Overcast
11:56 PM 51.1 °F 46.0 °F 83% 30.15 in 10.0 mi West 6.9 mph - N/A   Overcast