Weather History for San Francisco, CA

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Saturday, December 31, 2005

  Actual Average Record
Temperature  
Mean Temperature 56 °F 50 °F  
Max Temperature 61 °F 56 °F 67 °F (1958)
Min Temperature 51 °F 44 °F 29 °F (1978)
Degree Days  
Heating Degree Days 9 15  
Month to date heating degree days 363 445  
Since 1 July heating degree days 878 1010  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 68 164  
Growing Degree Days 6 (Base 50)    
Moisture  
Dew Point 55 °F    
Average Humidity 86    
Maximum Humidity 100    
Minimum Humidity 72    
Precipitation  
Precipitation 1.86 in 0.14 in 1.86 in (2005)
Month to date precipitation 9.34 4.03  
Year to date precipitation 26.99 20.65  
Since 1 July precipitation 10.73 7.57  
Snow  
Snow 0.00 in - 0.00 in ()
Month to date snowfall 0.0  
Since 1 July snowfall 0.0  
Snow Depth 0.00 in    
Sea Level Pressure  
Sea Level Pressure 29.68 in    
Wind  
Wind Speed 22 mph (SSW)    
Max Wind Speed 45 mph    
Max Gust Speed 60 mph    
Visibility 6 miles    
Events Rain    
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Date:

Astronomy

Dec. 31, 2005 Rise Set
Actual Time 7:24 AM PST 5:01 PM PST
Civil Twilight 6:55 AM PST 5:30 PM PST
Nautical Twilight 6:22 AM PST 6:03 PM PST
Astronomical Twilight 5:50 AM PST 6:34 PM PST
Moon 8:22 AM PST (12/31) 5:41 PM PST (12/31)
Length of Visible Light 10h 35m
Length of Day
9h 36m
New Moon, 1% of the Moon is Illuminated
Dec 31
New Moon
Jan 6
First Quarter
Jan 14
Full
Jan 22
Last Quarter
Jan 29
New

Hourly Weather History & Observations

Time (PST) Temp. Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:13 AM 60.8 °F 57.2 °F 88% 29.69 in 3.0 mi South 33.4 mph 40.3 mph 0.09 in Rain Heavy Rain
12:36 AM 60.8 °F 57.2 °F 88% 29.69 in 2.0 mi SSW 26.5 mph 33.4 mph 0.19 in Rain Heavy Rain
12:56 AM 61.0 °F 57.9 °F 90% 29.68 in 4.0 mi SSW 34.5 mph 43.7 mph 0.32 in Rain Rain
1:56 AM 60.1 °F 57.9 °F 93% 29.64 in 2.5 mi South 27.6 mph 35.7 mph 0.13 in Rain Heavy Rain
2:27 AM 60.8 °F 59.0 °F 94% 29.60 in 4.0 mi South 31.1 mph 43.7 mph 0.10 in Rain Rain
2:56 AM 61.0 °F 59.0 °F 93% 29.57 in 6.0 mi South 27.6 mph 49.5 mph 0.17 in Rain Light Rain
3:25 AM 60.8 °F 60.8 °F 100% 29.57 in 10.0 mi South 31.1 mph 49.5 mph 0.01 in Rain Light Rain
3:56 AM 61.0 °F 60.1 °F 97% 29.55 in 3.0 mi South 35.7 mph 54.1 mph 0.11 in Rain Light Rain
4:15 AM 60.8 °F 60.8 °F 100% 29.55 in 1.8 mi South 35.7 mph 48.3 mph 0.10 in   Overcast
4:31 AM 60.8 °F 60.8 °F 100% 29.56 in 2.0 mi South 35.7 mph 54.1 mph 0.24 in Rain Heavy Rain
4:56 AM 60.1 °F 60.1 °F 100% 29.55 in 2.5 mi SSW 33.4 mph 49.5 mph 0.43 in Rain Heavy Rain
5:33 AM 60.8 °F 59.0 °F 94% 29.51 in 1.8 mi South 35.7 mph 49.5 mph 0.25 in Rain Rain
5:56 AM 61.0 °F 59.0 °F 93% 29.50 in 3.0 mi South 38.0 mph 49.5 mph 0.34 in Rain Rain
6:38 AM 60.8 °F 60.8 °F 100% 29.50 in 1.5 mi SSW 38.0 mph 55.2 mph 0.16 in Rain Light Rain
6:56 AM 61.0 °F 60.1 °F 97% 29.52 in 2.0 mi SSW 38.0 mph 48.3 mph 0.27 in Rain Light Rain
7:22 AM 60.8 °F 60.8 °F 100% 29.53 in 4.0 mi SSW 38.0 mph 47.2 mph 0.09 in Rain Light Rain
7:56 AM 60.1 °F 59.0 °F 96% 29.55 in 7.0 mi SSW 31.1 mph 55.2 mph 0.09 in Rain Light Rain
8:56 AM 60.1 °F 59.0 °F 96% 29.57 in 10.0 mi SW 33.4 mph 44.9 mph 0.00 in   Overcast
9:56 AM 61.0 °F 57.0 °F 87% 29.61 in 9.0 mi SW 34.5 mph 55.2 mph N/A   Mostly Cloudy
10:08 AM 59.0 °F 53.6 °F 82% 29.61 in 9.0 mi West 23.0 mph 43.7 mph N/A   Overcast
10:36 AM 57.2 °F 51.8 °F 82% 29.63 in 4.0 mi WSW 29.9 mph 38.0 mph 0.00 in Rain Light Rain
10:56 AM 57.9 °F 51.1 °F 78% 29.65 in 8.0 mi WSW 23.0 mph 40.3 mph 0.00 in   Overcast
11:56 AM 57.9 °F 51.1 °F 78% 29.68 in 6.0 mi West 28.8 mph 36.8 mph 0.00 in Rain Light Rain
12:56 PM 57.9 °F 54.0 °F 87% 29.72 in 10.0 mi West 27.6 mph 38.0 mph 0.01 in   Mostly Cloudy
1:56 PM 57.9 °F 48.9 °F 72% 29.76 in 10.0 mi West 19.6 mph - N/A   Mostly Cloudy
2:56 PM 57.9 °F 48.0 °F 70% 29.80 in 10.0 mi West 16.1 mph - N/A   Scattered Clouds
3:56 PM 57.0 °F 48.0 °F 72% 29.82 in 10.0 mi West 12.7 mph - N/A   Scattered Clouds
4:56 PM 55.0 °F 48.0 °F 77% 29.83 in 10.0 mi SSW 10.4 mph - N/A   Scattered Clouds
5:56 PM 55.0 °F 48.0 °F 77% 29.87 in 10.0 mi South 9.2 mph - N/A   Partly Cloudy
6:56 PM 54.0 °F 48.0 °F 80% 29.89 in 10.0 mi SW 8.1 mph - N/A   Scattered Clouds
7:56 PM 54.0 °F 48.0 °F 80% 29.90 in 10.0 mi SSE 9.2 mph - N/A   Scattered Clouds
8:56 PM 53.1 °F 48.9 °F 86% 29.92 in 9.0 mi South 6.9 mph - N/A   Scattered Clouds
9:56 PM 52.0 °F 46.9 °F 83% 29.92 in 9.0 mi SE 8.1 mph - N/A   Partly Cloudy
10:56 PM 52.0 °F 46.9 °F 83% 29.93 in 9.0 mi SE 8.1 mph - N/A   Partly Cloudy
11:56 PM 51.1 °F 46.9 °F 86% 29.92 in 10.0 mi South 8.1 mph - N/A   Partly Cloudy