Weather History for San Francisco, CA

Change the Weather History Date:

Saturday, December 15, 2012

  Actual Average Record
Temperature  
Mean Temperature 45 °F 50 °F  
Max Temperature 49 °F 56 °F 71 °F (1980)
Min Temperature 40 °F 45 °F 31 °F (1967)
Degree Days  
Heating Degree Days 20 15  
Month to date heating degree days 165 205  
Since 1 July heating degree days 760 769  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 86 164  
Moisture  
Dew Point 40 °F    
Average Humidity 79    
Maximum Humidity 86    
Minimum Humidity 71    
Precipitation  
Precipitation 0.12 in 0.13 in 1.41 in (1957)
Month to date precipitation 2.46 1.75  
Year to date precipitation 17.68 18.37  
Since 1 July precipitation 7.22 5.29  
Sea Level Pressure  
Sea Level Pressure 30.04 in    
Wind  
Wind Speed 6 mph (SE)    
Max Wind Speed 20 mph    
Max Gust Speed 25 mph    
Visibility 10 miles    
Events Rain    
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

Daily Weather History Graph

Daily Weather History Graph

Search for Another Location

Airport:

Trip Planner

Search our weather history database for the weather conditions in past years. The results will help you decide how hot, cold, wet, or windy it might be!

Date:

Astronomy

Dec. 15, 2012 Rise Set
Actual Time 7:17 AM PST 4:52 PM PST
Civil Twilight 6:48 AM PST 5:21 PM PST
Nautical Twilight 6:15 AM PST 5:54 PM PST
Astronomical Twilight 5:43 AM PST 6:26 PM PST
Moon 9:16 AM PST (12/15) 8:00 PM PST (12/15)
Length of Visible Light 10h 33m
Length of Day
9h 34m
Waxing Crescent, 9% of the Moon is Illuminated
Dec 15
Waxing Crescent
Dec 19
First Quarter
Dec 28
Full
Jan 4
Last Quarter
Jan 11
New

Hourly Weather History & Observations

Time (PST) Temp. Windchill Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:56 AM 44.1 °F - 39.0 °F 82% 30.04 in 10.0 mi Calm Calm - N/A   Partly Cloudy
1:56 AM 42.1 °F 40.2 °F 37.9 °F 85% 30.06 in 10.0 mi South 3.5 mph - N/A   Partly Cloudy
2:56 AM 42.1 °F - 37.9 °F 85% 30.04 in 10.0 mi Calm Calm - N/A   Partly Cloudy
3:56 AM 41.0 °F 39.0 °F 37.0 °F 86% 30.04 in 10.0 mi West 3.5 mph - N/A   Clear
4:56 AM 41.0 °F 39.0 °F 37.0 °F 86% 30.04 in 10.0 mi West 3.5 mph - N/A   Clear
5:56 AM 41.0 °F 39.0 °F 37.0 °F 86% 30.04 in 10.0 mi South 3.5 mph - N/A   Scattered Clouds
6:56 AM 42.1 °F - 37.9 °F 85% 30.04 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
7:56 AM 44.1 °F 41.5 °F 37.9 °F 79% 30.05 in 10.0 mi ESE 4.6 mph - N/A   Mostly Cloudy
8:56 AM 46.0 °F 44.8 °F 39.9 °F 79% 30.08 in 10.0 mi East 3.5 mph - N/A   Overcast
9:56 AM 46.0 °F - 39.0 °F 76% 30.09 in 10.0 mi Calm Calm - N/A   Overcast
10:56 AM 46.9 °F - 39.0 °F 74% 30.08 in 10.0 mi SE 6.9 mph - N/A   Overcast
11:56 AM 48.0 °F - 39.0 °F 71% 30.05 in 10.0 mi South 4.6 mph - N/A   Overcast
12:56 PM 48.0 °F - 39.9 °F 74% 30.04 in 9.0 mi Calm Calm - 0.01 in Rain Light Rain
1:56 PM 48.0 °F - 42.1 °F 80% 30.02 in 6.0 mi SE 11.5 mph - 0.04 in Rain Rain
2:56 PM 48.0 °F - 44.1 °F 86% 30.01 in 8.0 mi SE 11.5 mph - 0.04 in Rain Light Rain
3:56 PM 48.2 °F - 42.8 °F 82% 30.00 in 9.0 mi ESE 15.0 mph 24.2 mph N/A Rain Light Rain
4:56 PM 48.0 °F - 43.0 °F 83% 30.01 in 10.0 mi SE 16.1 mph 25.3 mph 0.01 in Rain Light Rain
5:56 PM 48.0 °F - 43.0 °F 83% 30.01 in 10.0 mi ESE 11.5 mph - 0.00 in   Overcast
6:56 PM 48.0 °F - 42.1 °F 80% 30.01 in 10.0 mi ESE 15.0 mph - N/A   Overcast
7:56 PM 48.0 °F - 41.0 °F 77% 30.00 in 10.0 mi ESE 13.8 mph - N/A   Overcast
8:56 PM 48.0 °F - 39.9 °F 74% 30.01 in 10.0 mi SE 10.4 mph - N/A   Overcast
9:56 PM 48.2 °F - 39.2 °F 71% 30.04 in 10.0 mi SE 5.8 mph - N/A   Overcast
10:56 PM 48.0 °F - 41.0 °F 77% 30.05 in 10.0 mi Variable 4.6 mph - N/A   Overcast
11:56 PM 48.0 °F - 42.1 °F 80% 30.06 in 10.0 mi Calm Calm - N/A   Overcast