Weather History for San Francisco, CA

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Saturday, October 20, 1990

  Actual Average Record
Temperature  
Mean Temperature 62 °F 61 °F  
Max Temperature 73 °F 70 °F 89 °F (1991)
Min Temperature 50 °F 53 °F 37 °F (1949)
Degree Days  
Heating Degree Days 4 4  
Month to date heating degree days 65  
Since 1 July heating degree days 231  
Cooling Degree Days 0 1  
Month to date cooling degree days 20  
Year to date cooling degree days 161  
Growing Degree Days 12 (Base 50)    
Moisture  
Dew Point 43 °F    
Average Humidity 59    
Maximum Humidity 77    
Minimum Humidity 18    
Precipitation  
Precipitation 0.00 in 0.04 in 0.59 in (1985)
Month to date precipitation 0.46  
Year to date precipitation 13.75  
Since 1 July precipitation 0.67  
Sea Level Pressure  
Sea Level Pressure 30.10 in    
Wind  
Wind Speed 5 mph (West)    
Max Wind Speed 22 mph    
Max Gust Speed -    
Visibility 13 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Date:

Astronomy

Oct. 20, 1990 Rise Set
Actual Time 7:22 AM PDT 6:25 PM PDT
Civil Twilight 6:55 AM PDT 6:52 PM PDT
Nautical Twilight 6:25 AM PDT 7:22 PM PDT
Astronomical Twilight 5:55 AM PDT 7:52 PM PDT
Moon 9:31 AM PDT (10/20) 7:18 PM PDT (10/20)
Length of Visible Light 11h 56m
Length of Day
11h 03m
Waxing Crescent, 4% of the Moon is Illuminated
Oct 20
Waxing Crescent
Oct 26
First Quarter
Nov 2
Full
Nov 9
Last Quarter
Nov 17
New

Hourly Weather History & Observations

Time (PDT) Temp. Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:00 AM 53.1 °F 43.0 °F 69% 30.05 in 10.0 mi West 5.8 mph - N/A   Clear
1:00 AM 54.0 °F 46.9 °F 77% 30.05 in 10.0 mi Calm Calm - N/A   Clear
2:00 AM 55.0 °F 46.9 °F 74% 30.06 in 10.0 mi SSW 3.5 mph - N/A   Clear
3:00 AM 55.0 °F 46.0 °F 72% 30.06 in 10.0 mi South 4.6 mph - N/A   Clear
4:00 AM 52.0 °F 42.1 °F 69% 30.07 in 10.0 mi South 4.6 mph - N/A   Clear
5:00 AM 51.1 °F 39.9 °F 66% 30.08 in 10.0 mi West 3.5 mph - N/A   Clear
6:00 AM 51.1 °F 42.1 °F 71% 30.09 in 10.0 mi SW 3.5 mph - N/A   Clear
7:00 AM 51.1 °F 42.1 °F 71% 30.09 in 10.0 mi Calm Calm - N/A   Clear
8:00 AM 50.0 °F 43.0 °F 77% 30.10 in 20.0 mi Calm Calm - N/A   Clear
9:00 AM 57.9 °F 46.0 °F 65% 30.14 in 30.0 mi Calm Calm - N/A   Clear
10:00 AM 62.1 °F 48.0 °F 60% 30.13 in 20.0 mi SE 4.6 mph - N/A   Clear
11:00 AM 64.0 °F 48.9 °F 58% 30.14 in 20.0 mi NNE 4.6 mph - N/A   Clear
12:00 PM 68.0 °F 48.0 °F 49% 30.13 in 20.0 mi NE 3.5 mph - N/A   Clear
1:00 PM 72.0 °F 30.0 °F 21% 30.12 in 25.0 mi Calm Calm - N/A   Partly Cloudy
2:00 PM 73.9 °F 27.0 °F 18% 30.11 in 25.0 mi NNE 4.6 mph - N/A   Partly Cloudy
3:00 PM 71.1 °F 48.0 °F 44% 30.10 in 25.0 mi NW 12.7 mph - N/A   Partly Cloudy
4:00 PM 68.0 °F 43.0 °F 40% 30.10 in 30.0 mi WNW 17.3 mph - N/A   Partly Cloudy
5:00 PM 66.0 °F 39.0 °F 37% 30.08 in 35.0 mi WNW 21.9 mph - N/A   Partly Cloudy
6:00 PM 62.1 °F 43.0 °F 50% 30.08 in 35.0 mi West 16.1 mph - N/A   Clear
7:00 PM 60.1 °F 42.1 °F 51% 30.09 in 15.0 mi WNW 12.7 mph - N/A   Clear
8:00 PM 57.9 °F 42.1 °F 56% 30.10 in 10.0 mi WNW 15.0 mph - N/A   Clear
9:00 PM 57.0 °F 45.0 °F 64% 30.11 in 10.0 mi WNW 12.7 mph - N/A   Clear
10:00 PM 55.0 °F 46.9 °F 74% 30.12 in 10.0 mi West 4.6 mph - N/A   Clear
11:00 PM 55.0 °F 46.0 °F 72% 30.13 in 10.0 mi West 3.5 mph - N/A   Clear