Weather History for KSFO - January, 2000

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Tuesday, January 18, 2000

  Actual Average Record
Temperature  
Mean Temperature 55 °F 50 °F  
Max Temperature 59 °F 56 °F 68 °F (1948)
Min Temperature 51 °F 44 °F 30 °F (1947)
Degree Days  
Heating Degree Days 10 15  
Month to date heating degree days 270  
Since 1 July heating degree days 1280  
Cooling Degree Days 0 0  
Month to date cooling degree days 0  
Year to date cooling degree days 0  
Growing Degree Days 5 (Base 50)    
Moisture  
Dew Point 52 °F    
Average Humidity 96    
Maximum Humidity 100    
Minimum Humidity 87    
Precipitation  
Precipitation 0.61 in 0.13 in 1.82 in (1969)
Month to date precipitation 2.51  
Year to date precipitation 2.51  
Since 1 July precipitation 10.08  
Sea Level Pressure  
Sea Level Pressure 30.05 in    
Wind  
Wind Speed 5 mph (NNE)    
Max Wind Speed 16 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

Jan. 18, 2000 Rise Set
Actual Time 7:22 AM PST 5:17 PM PST
Civil Twilight 6:53 AM PST 5:46 PM PST
Nautical Twilight 6:21 AM PST 6:18 PM PST
Astronomical Twilight 5:50 AM PST 6:49 PM PST
Moon 3:00 PM PST (1/18) 4:43 AM PST (1/18)
Length of Visible Light 10h 52m
Length of Day
9h 55m
Waxing Gibbous, 92% of the Moon is Illuminated
Jan 18
Waxing Gibbous
Jan 20
Full
Jan 27
Last Quarter
Feb 5
New
Feb 12
First Quarter

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 50.0 °F 96% 30.02 in 4.0 mi East 4.6 mph - 0.07 in Rain Light Rain
1:56 AM 51.1 °F 51.1 °F 100% 30.01 in 4.0 mi Calm Calm - 0.07 in Rain Light Rain
2:56 AM 52.0 °F 51.1 °F 97% 30.01 in 5.0 mi Calm Calm - 0.09 in Rain Light Rain
3:56 AM 52.0 °F 51.1 °F 97% 29.99 in 3.0 mi Calm Calm - 0.08 in Rain Light Rain
4:12 AM 51.8 °F 51.8 °F 100% 29.99 in 2.0 mi NNW 3.5 mph - 0.05 in Rain Rain
4:49 AM 51.8 °F 51.8 °F 100% 29.98 in 4.0 mi NNE 5.8 mph - 0.10 in Rain Light Rain
4:56 AM 51.1 °F 51.1 °F 100% 29.98 in 4.0 mi NNE 4.6 mph - 0.11 in Rain Light Rain
5:05 AM 51.8 °F 51.8 °F 100% 29.98 in 3.0 mi NNE 5.8 mph - 0.00 in Rain Light Rain
5:13 AM 51.8 °F 51.8 °F 100% 29.98 in 3.0 mi NNE 5.8 mph - 0.01 in Rain Light Rain
5:35 AM 51.8 °F 51.8 °F 100% 29.98 in 2.5 mi NNE 6.9 mph - 0.03 in Rain Light Rain
5:56 AM 51.1 °F 51.1 °F 100% 29.99 in 3.0 mi NNE 9.2 mph - 0.07 in Rain Rain
6:15 AM 51.8 °F 51.8 °F 100% 29.99 in 5.0 mi NNE 9.2 mph - 0.02 in Rain Light Rain
6:56 AM 51.1 °F 50.0 °F 96% 30.01 in 4.0 mi North 5.8 mph - 0.02 in   Overcast
7:29 AM 51.8 °F 50.0 °F 94% 30.01 in 5.0 mi NW 5.8 mph - 0.02 in Rain Light Rain
7:56 AM 51.1 °F 50.0 °F 96% 30.03 in 2.0 mi NW 4.6 mph - 0.03 in Rain Light Rain
8:05 AM 51.8 °F 51.8 °F 100% 30.03 in 1.5 mi North 5.8 mph - 0.03 in Rain Rain
8:27 AM 51.8 °F 51.8 °F 100% 30.04 in 2.0 mi Calm Calm - 0.04 in Rain Light Rain
8:56 AM 51.1 °F 51.1 °F 100% 30.05 in 2.5 mi ENE 4.6 mph - 0.06 in Rain Light Rain
9:26 AM 51.8 °F 51.8 °F 100% 30.04 in 3.0 mi ESE 11.5 mph - 0.01 in   Mostly Cloudy
9:56 AM 52.0 °F 52.0 °F 100% 30.06 in 5.0 mi ESE 9.2 mph - 0.01 in   Mostly Cloudy
10:15 AM 51.8 °F 51.8 °F 100% 30.05 in 6.0 mi East 16.1 mph - N/A   Mostly Cloudy
10:56 AM 54.0 °F 53.1 °F 97% 30.07 in 7.0 mi ESE 11.5 mph - N/A   Mostly Cloudy
11:10 AM 53.6 °F 53.6 °F 100% 30.06 in 8.0 mi East 11.5 mph - N/A   Mostly Cloudy
11:56 AM 55.0 °F 54.0 °F 96% 30.06 in 10.0 mi ENE 11.5 mph - N/A   Scattered Clouds
12:19 PM 53.6 °F 53.6 °F 100% 30.06 in 10.0 mi NE 10.4 mph - N/A   Mostly Cloudy
12:56 PM 57.0 °F 54.0 °F 89% 30.07 in 10.0 mi North 3.5 mph - N/A   Mostly Cloudy
1:36 PM 57.2 °F 55.4 °F 94% 30.07 in 10.0 mi NNW 8.1 mph - N/A   Mostly Cloudy
1:56 PM 59.0 °F 55.0 °F 87% 30.07 in 10.0 mi North 6.9 mph - N/A   Mostly Cloudy
2:56 PM 59.0 °F 55.0 °F 87% 30.09 in 10.0 mi North 6.9 mph - N/A   Mostly Cloudy
3:56 PM 57.9 °F 54.0 °F 87% 30.09 in 10.0 mi North 9.2 mph - N/A   Mostly Cloudy
4:56 PM 55.9 °F 54.0 °F 93% 30.10 in 8.0 mi North 9.2 mph - N/A   Mostly Cloudy
5:56 PM 55.9 °F 53.1 °F 90% 30.11 in 10.0 mi NW 6.9 mph - N/A   Mostly Cloudy
6:56 PM 55.9 °F 54.0 °F 93% 30.12 in 10.0 mi ENE 9.2 mph - N/A   Mostly Cloudy
7:56 PM 54.0 °F 53.1 °F 97% 30.13 in 10.0 mi NNW 4.6 mph - N/A   Mostly Cloudy
8:56 PM 54.0 °F 53.1 °F 97% 30.14 in 8.0 mi Calm Calm - N/A   Mostly Cloudy
9:56 PM 55.0 °F 53.1 °F 93% 30.14 in 8.0 mi NW 4.6 mph - N/A   Overcast
10:56 PM 55.0 °F 53.1 °F 93% 30.15 in 8.0 mi SSE 4.6 mph - N/A   Mostly Cloudy
11:16 PM 55.4 °F 53.6 °F 94% 30.15 in 8.0 mi Calm Calm - N/A   Overcast
11:40 PM 53.6 °F 53.6 °F 100% 30.15 in 7.0 mi SSE 3.5 mph - N/A   Overcast
11:56 PM 55.0 °F 54.0 °F 96% 30.14 in 8.0 mi South 3.5 mph - N/A   Overcast