History for San Francisco, CA

Friday, December 28, 2012 — View Current Conditions
Friday, December 28, 2012
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Daily Weekly Monthly Custom
  Actual Average Record
Temperature
Mean Temperature 46 °F 50 °F  
Max Temperature 50 °F 56 °F 71 °F (1967)
Min Temperature 41 °F 44 °F 32 °F (1966)
Degree Days
Heating Degree Days 19 15  
Month to date heating degree days 347 400  
Since 1 July heating degree days 942 964  
Cooling Degree Days 0 0  
Month to date cooling degree days 0 0  
Year to date cooling degree days 86 164  
Moisture
Dew Point 39 °F    
Average Humidity 75    
Maximum Humidity 89    
Minimum Humidity 61    
Precipitation
Precipitation 0.17 in 0.14 in 1.46 in (1991)
Month to date precipitation 6.13 3.61  
Year to date precipitation 21.35 20.23  
Since 1 July precipitation 10.89 7.15  
Sea Level Pressure
Sea Level Pressure 30.12 in    
Wind
Wind Speed 5 mph (East)    
Max Wind Speed 13 mph    
Max Gust Speed 14 mph    
Visibility 10 miles    
Events Rain    
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary
Daily Graph
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Local Photos
Sunrise 2012-12-28
The Calm Before the Next Storm - Belmont, CA
Coastal Winter Colors - V
Limantour Beach on a cloudy afternoon
Coastal Winter Colors - IV
Overlooking Limantour Beach towards Bolinas on a cloudy afternoon (sorry for any graininess, took pic with iPhone...)
Coastal Winter Colors - III
Overlooking Limantour Beach towards Bolinas on a cloudy afternoon (sorry for any graininess, took pic with iPhone...)
Coastal Winter Colors - I
Overlooking Limantour Beach towards Bolinas on a cloudy afternoon
Coastal Winter Colors - II
Wild mustard over Limantour beach
Junco
Coastal Winter Colors - X
A few confused/holdout lupines blooming at the bases of the cliffs of Limantour Beach on a cloudy afternoon
Coastal Winter Colors - IX
Banana slug grazing through the beach ice plants... not the safest place for it to live, but seems to be avoiding the tides and gulls well. (sorry for...
Coastal Winter Colors - VII
Overlooking Limantour Beach towards Bolinas on a cloudy afternoon
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Astronomy
May. 22, 2013 Rise Set
Actual Time 7:23 AM PST 4:59 PM PST
Civil Twilight 6:54 AM PST 5:28 PM PST
Nautical Twilight 6:21 AM PST 6:01 PM PST
Astronomical Twilight 5:49 AM PST 6:33 PM PST
Moon 5:39 PM PST (12/28) 7:22 AM PST (12/28)
Length Of Visible Light 10h 33m
Length of Day
9h 35m
Full, 100% of the Moon is Illuminated
Dec 28
Full
Jan 4
Last Quarter
Jan 11
New
Jan 18
First Quarter
Jan 26
Full
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Hourly Observations
Time (PST) Temp. Windchill Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:56 AM 46.9 °F - 41.0 °F 80% 30.18 in 10.0 mi South 4.6 mph - N/A   Mostly Cloudy
1:56 AM 45.0 °F - 39.0 °F 80% 30.19 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
2:56 AM 44.1 °F 40.8 °F 39.0 °F 82% 30.19 in 10.0 mi SSE 5.8 mph - N/A   Mostly Cloudy
3:56 AM 45.0 °F 41.2 °F 37.9 °F 76% 30.17 in 10.0 mi ESE 6.9 mph - N/A   Mostly Cloudy
4:56 AM 43.0 °F - 39.0 °F 86% 30.16 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
5:56 AM 41.0 °F - 37.0 °F 86% 30.17 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
6:56 AM 44.1 °F - 39.0 °F 82% 30.17 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
7:56 AM 44.1 °F 42.5 °F 39.0 °F 82% 30.17 in 10.0 mi SSE 3.5 mph - N/A   Mostly Cloudy
8:56 AM 45.0 °F - 39.0 °F 80% 30.18 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
9:56 AM 46.0 °F 43.1 °F 37.9 °F 73% 30.18 in 10.0 mi SE 5.8 mph - N/A   Mostly Cloudy
10:56 AM 46.0 °F 42.5 °F 37.9 °F 73% 30.16 in 10.0 mi SE 6.9 mph - N/A   Mostly Cloudy
11:56 AM 46.9 °F - 39.0 °F 74% 30.13 in 10.0 mi SE 6.9 mph - N/A   Overcast
12:56 PM 48.0 °F - 37.9 °F 68% 30.11 in 10.0 mi East 4.6 mph - N/A   Overcast
1:56 PM 48.9 °F - 39.0 °F 69% 30.09 in 10.0 mi ENE 4.6 mph - N/A   Overcast
2:56 PM 50.0 °F - 37.4 °F 62% 30.09 in 10.0 mi East 4.6 mph - N/A   Mostly Cloudy
3:56 PM 50.0 °F - 37.0 °F 61% 30.08 in 10.0 mi NE 3.5 mph - N/A   Mostly Cloudy
4:56 PM 48.9 °F - 39.0 °F 69% 30.06 in 10.0 mi East 4.6 mph - N/A   Mostly Cloudy
5:56 PM 50.0 °F - 39.9 °F 68% 30.05 in 10.0 mi ENE 5.8 mph - N/A   Mostly Cloudy
6:56 PM 50.0 °F - 39.9 °F 68% 30.05 in 10.0 mi East 4.6 mph - N/A   Mostly Cloudy
7:56 PM 50.0 °F - 41.0 °F 71% 30.04 in 10.0 mi East 6.9 mph - N/A   Mostly Cloudy
8:56 PM 48.9 °F - 41.0 °F 74% 30.04 in 10.0 mi ENE 10.4 mph - 0.00 in Rain Light Rain
9:56 PM 48.0 °F - 39.9 °F 74% 30.04 in 9.0 mi ENE 10.4 mph - 0.02 in Rain Light Rain
10:56 PM 46.9 °F - 39.9 °F 77% 30.06 in 6.0 mi NNE 6.9 mph - 0.09 in Rain Rain
11:56 PM 46.9 °F - 39.9 °F 77% 30.05 in 6.0 mi NE 9.2 mph - 0.06 in Rain Light Rain
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