Weather History for San Francisco, CA

Change the Weather History Date:

Monday, December 31, 2012

  Actual Average Record
Temperature  
Mean Temperature 45 °F 50 °F  
Max Temperature 53 °F 56 °F 67 °F (1958)
Min Temperature 37 °F 44 °F 29 °F (1978)
Degree Days  
Heating Degree Days 20 15  
Month to date heating degree days 400 445  
Since 1 July heating degree days 995 1010  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 86 164  
Moisture  
Dew Point 33 °F    
Average Humidity 56    
Maximum Humidity 76    
Minimum Humidity 35    
Precipitation  
Precipitation 0.00 in 0.14 in 1.86 in (2005)
Month to date precipitation 6.24 4.03  
Year to date precipitation 21.46 20.65  
Since 1 July precipitation 11.00 7.57  
Sea Level Pressure  
Sea Level Pressure 30.26 in    
Wind  
Wind Speed 3 mph (SSE)    
Max Wind Speed 9 mph    
Max Gust Speed 21 mph    
Visibility 10 miles    
Events      
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. 31, 2012 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 6:35 PM PST
Moon 8:33 PM PST (12/31) 9:12 AM PST (12/31)
Length of Visible Light 10h 35m
Length of Day
9h 36m
Waning Gibbous, 89% of the Moon is Illuminated
Dec 31
Waning Gibbous
Jan 4
Last Quarter
Jan 11
New
Jan 18
First Quarter
Jan 26
Full

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 46.0 °F - 33.1 °F 61% 30.20 in 10.0 mi Calm Calm - N/A   Clear
1:56 AM 44.1 °F - 34.0 °F 68% 30.22 in 10.0 mi Calm Calm - N/A   Scattered Clouds
2:56 AM 42.1 °F - 33.1 °F 70% 30.23 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
3:56 AM 41.0 °F 38.0 °F 33.1 °F 73% 30.24 in 10.0 mi South 4.6 mph - N/A   Mostly Cloudy
4:56 AM 42.1 °F 39.2 °F 35.1 °F 76% 30.22 in 10.0 mi SSE 4.6 mph - N/A   Partly Cloudy
5:56 AM 39.2 °F - 30.2 °F 70% 30.23 in 10.0 mi Calm Calm - N/A   Partly Cloudy
6:56 AM 41.0 °F - 30.9 °F 67% 30.26 in 10.0 mi Calm Calm - N/A   Partly Cloudy
7:56 AM 37.9 °F 34.4 °F 30.0 °F 73% 30.28 in 10.0 mi SW 4.6 mph - N/A   Scattered Clouds
8:56 AM 45.0 °F 42.6 °F 35.1 °F 68% 30.28 in 10.0 mi SE 4.6 mph - N/A   Mostly Cloudy
9:56 AM 46.9 °F - 30.0 °F 52% 30.30 in 10.0 mi ESE 6.9 mph - N/A   Mostly Cloudy
10:56 AM 48.9 °F - 27.0 °F 43% 30.30 in 10.0 mi ESE 6.9 mph - N/A   Scattered Clouds
11:56 AM 50.0 °F - 30.9 °F 48% 30.28 in 10.0 mi East 6.9 mph - N/A   Scattered Clouds
12:56 PM 51.1 °F - 28.9 °F 43% 30.26 in 10.0 mi East 3.5 mph - N/A   Scattered Clouds
1:56 PM 51.1 °F - 25.0 °F 36% 30.25 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
2:56 PM 53.1 °F - 27.0 °F 37% 30.25 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
3:56 PM 51.1 °F - 30.9 °F 46% 30.25 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
4:56 PM 51.1 °F - 28.0 °F 41% 30.25 in 10.0 mi SSW 3.5 mph - N/A   Mostly Cloudy
5:56 PM 50.0 °F - 36.0 °F 59% 30.27 in 10.0 mi West 4.6 mph - N/A   Mostly Cloudy
6:56 PM 50.0 °F - 37.0 °F 61% 30.25 in 10.0 mi South 5.8 mph - N/A   Mostly Cloudy
7:56 PM 50.0 °F - 39.0 °F 66% 30.26 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
8:56 PM 48.9 °F - 37.9 °F 66% 30.26 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
9:56 PM 46.9 °F - 39.0 °F 74% 30.27 in 10.0 mi SSE 4.6 mph - N/A   Mostly Cloudy
10:56 PM 46.0 °F - 39.0 °F 76% 30.27 in 10.0 mi Calm Calm - N/A   Partly Cloudy
11:56 PM 44.1 °F - 37.9 °F 79% 30.25 in 10.0 mi Calm Calm - N/A   Partly Cloudy