San Francisco, CA

7:04 AM PDT on May 26, 2017 (GMT -0700)
San Francisco International

Weather History for KSFO - December, 1997

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Wednesday, December 17, 1997

  Actual Average Record
Temperature  
Mean Temperature 52 °F 50 °F  
Max Temperature 54 °F 56 °F 67 °F (1958)
Min Temperature 50 °F 44 °F 30 °F (1965)
Degree Days  
Heating Degree Days 13 15  
Month to date heating degree days 235  
Since 1 July heating degree days 799  
Cooling Degree Days 0 0  
Month to date cooling degree days 0  
Year to date cooling degree days 164  
Growing Degree Days 2 (Base 50)    
Moisture  
Dew Point 49 °F    
Average Humidity 91    
Maximum Humidity 100    
Minimum Humidity 82    
Precipitation  
Precipitation 0.18 in 0.13 in 1.26 in (2005)
Month to date precipitation 2.01  
Year to date precipitation 18.63  
Sea Level Pressure  
Sea Level Pressure 30.10 in    
Wind  
Wind Speed 4 mph (NNE)    
Max Wind Speed 20 mph    
Max Gust Speed -    
Visibility 6 miles    
Events Rain    
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Date:

Astronomy

Dec. 17, 1997 Rise Set
Actual Time 7:18 AM PST 4:52 PM PST
Civil Twilight 6:49 AM PST 5:22 PM PST
Nautical Twilight 6:16 AM PST 5:55 PM PST
Astronomical Twilight 5:44 AM PST 6:27 PM PST
Moon 8:47 PM PST (12/17) 9:57 AM PST (12/17)
Length of Visible Light 10h 32m
Length of Day
9h 34m
Waning Gibbous, 85% of the Moon is Illuminated
Dec 17
Waning Gibbous
Dec 21
Last Quarter
Dec 29
New
Jan 5
First Quarter
Jan 12
Full

Hourly Weather History & Observations

Time (PST) Temp. Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:56 AM 51.1 °F 48.0 °F 89% 30.20 in 8.0 mi SE 3.5 mph - N/A   Overcast
1:56 AM 52.0 °F 48.9 °F 89% 30.21 in 7.0 mi Calm Calm - N/A   Overcast
2:56 AM 52.0 °F 48.9 °F 89% 30.19 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
3:33 AM 51.8 °F 48.2 °F 88% 30.18 in 7.0 mi Calm Calm - N/A   Overcast
3:56 AM 52.0 °F 48.9 °F 89% 30.18 in 7.0 mi Calm Calm - N/A   Overcast
4:20 AM 51.8 °F 48.2 °F 88% 30.18 in 7.0 mi Calm Calm - N/A   Overcast
4:37 AM 51.8 °F 50.0 °F 94% 30.17 in 6.0 mi NE 4.6 mph - N/A   Overcast
4:48 AM 51.8 °F 50.0 °F 94% 30.17 in 6.0 mi ENE 4.6 mph - N/A   Overcast
4:56 AM 52.0 °F 50.0 °F 93% 30.17 in 6.0 mi East 3.5 mph - N/A   Overcast
5:56 AM 51.1 °F 48.9 °F 92% 30.18 in 7.0 mi Calm Calm - N/A   Mostly Cloudy
6:56 AM 51.1 °F 48.9 °F 92% 30.18 in 7.0 mi Calm Calm - N/A   Mostly Cloudy
7:56 AM 51.1 °F 48.9 °F 92% 30.17 in 5.0 mi East 3.5 mph - N/A   Mostly Cloudy
8:09 AM 51.8 °F 50.0 °F 94% 30.16 in 5.0 mi East 4.6 mph - N/A   Mostly Cloudy
8:56 AM 51.1 °F 48.9 °F 92% 30.17 in 5.0 mi SE 3.5 mph - N/A   Overcast
9:08 AM 51.8 °F 48.2 °F 88% 30.17 in 5.0 mi SSE 4.6 mph - N/A   Overcast
9:56 AM 52.0 °F 50.0 °F 93% 30.18 in 5.0 mi NNE 3.5 mph - N/A   Mostly Cloudy
10:56 AM 53.1 °F 48.9 °F 86% 30.16 in 7.0 mi NE 3.5 mph - N/A   Mostly Cloudy
11:56 AM 53.1 °F 48.9 °F 86% 30.12 in 8.0 mi ENE 3.5 mph - N/A   Mostly Cloudy
12:56 PM 54.0 °F 50.0 °F 86% 30.09 in 6.0 mi Calm Calm - N/A   Overcast
1:46 PM 53.6 °F 51.8 °F 94% 30.06 in 5.0 mi NNE 4.6 mph - N/A   Overcast
1:56 PM 54.0 °F 51.1 °F 90% 30.06 in 5.0 mi North 5.8 mph - N/A   Overcast
2:16 PM 53.6 °F 51.8 °F 94% 30.05 in 4.0 mi North 6.9 mph - 0.00 in   Overcast
2:32 PM 53.6 °F 51.8 °F 94% 30.05 in 2.0 mi North 3.5 mph - 0.00 in Rain Light Rain
2:43 PM 53.6 °F 51.8 °F 94% 30.05 in 1.8 mi North 3.5 mph - 0.01 in Rain Light Rain
2:56 PM 53.1 °F 51.1 °F 93% 30.05 in 1.8 mi North 4.6 mph - 0.01 in Rain Light Rain
3:08 PM 53.6 °F 51.8 °F 94% 30.04 in 1.8 mi NW 4.6 mph - 0.01 in Rain Light Rain
3:43 PM 51.8 °F 51.8 °F 100% 30.04 in 1.2 mi North 4.6 mph - 0.06 in Rain Light Rain
3:56 PM 52.0 °F 52.0 °F 100% 30.04 in 1.0 mi North 10.4 mph - 0.08 in Rain Light Rain
4:07 PM 51.8 °F 51.8 °F 100% 30.04 in 1.0 mi North 8.1 mph - 0.03 in Rain Rain
4:56 PM 50.0 °F 50.0 °F 100% 30.04 in 2.0 mi North 19.6 mph - 0.08 in Rain Light Rain
5:21 PM 50.0 °F 50.0 °F 100% 30.04 in 3.0 mi North 11.5 mph - 0.01 in Rain Light Rain
5:56 PM 50.0 °F 48.9 °F 96% 30.04 in 10.0 mi NNW 6.9 mph - 0.01 in Rain Light Rain
6:06 PM 50.0 °F 48.2 °F 94% 30.03 in 10.0 mi NNW 8.1 mph - 0.00 in   Drizzle
6:56 PM 51.1 °F 48.0 °F 89% 30.02 in 10.0 mi NE 4.6 mph - 0.00 in   Overcast
7:56 PM 51.1 °F 46.9 °F 86% 30.01 in 10.0 mi Calm Calm - N/A   Overcast
8:22 PM 51.8 °F 46.4 °F 82% 30.00 in 10.0 mi NE 9.2 mph - N/A   Overcast
8:56 PM 51.1 °F 48.0 °F 89% 29.99 in 10.0 mi NE 16.1 mph - N/A   Overcast
9:56 PM 51.1 °F 46.0 °F 83% 29.99 in 10.0 mi ENE 15.0 mph - N/A   Overcast
10:56 PM 51.1 °F 46.0 °F 83% 29.99 in 10.0 mi NE 9.2 mph - N/A   Overcast
11:56 PM 50.0 °F 46.0 °F 86% 29.98 in 10.0 mi NE 6.9 mph - N/A   Overcast