History for San Francisco, CA

Monday, December 24, 2012 — View Current Conditions

Monday, December 24, 2012

	Actual	Average	Record
Temperature
Mean Temperature	51 °F	50 °F
Max Temperature	56 °F	56 °F	65 °F (1967)
Min Temperature	46 °F	44 °F	29 °F (1990)
Degree Days
Heating Degree Days	14	15
Month to date heating degree days	284	340
Since 1 July heating degree days	879	904
Cooling Degree Days	0	0
Month to date cooling degree days	0	0
Year to date cooling degree days	86	164
Moisture
Dew Point	42 °F
Average Humidity	74
Maximum Humidity	93
Minimum Humidity	54
Precipitation
Precipitation	T in	0.15 in	2.00 in (1983)
Month to date precipitation	4.86	3.04
Year to date precipitation	20.08	19.66
Since 1 July precipitation	9.62	6.58
Sea Level Pressure
Sea Level Pressure	30.16 in
Wind
Wind Speed	5 mph (NNW)
Max Wind Speed	13 mph
Max Gust Speed	15 mph
Visibility	10 miles
Events

T = Trace of Precipitation, MM = Missing Value

Source: NWS Daily Summary

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	Red Ornaments Merry Christmas *
	Bright Spot Merry Christmas . Happy Holidays

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Astronomy

May. 20, 2013	Rise	Set
Actual Time	7:22 AM PST	4:56 PM PST
Civil Twilight	6:53 AM PST	5:25 PM PST
Nautical Twilight	6:20 AM PST	5:58 PM PST
Astronomical Twilight	5:48 AM PST	6:30 PM PST
Moon	2:26 PM PST (12/24)	4:07 AM PST (12/24)
Length Of Visible Light	10h 32m
Length of Day	9h 34m

Waxing Gibbous, 89% of the Moon is Illuminated
Dec 24 Waxing Gibbous	Dec 28 Full	Jan 4 Last Quarter	Jan 11 New	Jan 18 First Quarter

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Hourly Observations

Time (PST)	Temp.	Windchill	Dew Point	Humidity	Pressure	Visibility	Wind Dir	Wind Speed	Gust Speed	Precip	Conditions
12:56 AM	52.0 °F	-	45.0 °F	77%	30.05 in	10.0 mi	West	9.2 mph	-	N/A	Partly Cloudy
1:56 AM	51.1 °F	-	44.1 °F	77%	30.07 in	10.0 mi	West	8.1 mph	-	N/A	Scattered Clouds
2:56 AM	52.0 °F	-	45.0 °F	77%	30.09 in	10.0 mi	NNW	5.8 mph	-	N/A	Partly Cloudy
3:56 AM	50.0 °F	-	45.0 °F	83%	30.09 in	10.0 mi	West	3.5 mph	-	N/A	Partly Cloudy
4:56 AM	46.9 °F	-	44.1 °F	90%	30.10 in	10.0 mi	West	8.1 mph	-	0.00 in	Scattered Clouds
5:56 AM	46.9 °F	-	43.0 °F	86%	30.14 in	10.0 mi	West	8.1 mph	-	N/A	Mostly Cloudy
6:56 AM	48.0 °F	-	43.0 °F	83%	30.17 in	10.0 mi	WNW	3.5 mph	-	N/A	Scattered Clouds
7:56 AM	48.9 °F	-	43.0 °F	80%	30.18 in	10.0 mi	Calm	Calm	-	N/A	Mostly Cloudy
8:56 AM	51.1 °F	-	45.0 °F	80%	30.19 in	10.0 mi	South	3.5 mph	-	N/A	Scattered Clouds
9:56 AM	51.1 °F	-	45.0 °F	80%	30.22 in	10.0 mi	NE	5.8 mph	-	N/A	Scattered Clouds
10:56 AM	53.1 °F	-	45.0 °F	74%	30.20 in	10.0 mi	NE	3.5 mph	-	N/A	Scattered Clouds
11:56 AM	54.0 °F	-	44.1 °F	69%	30.19 in	10.0 mi	Calm	Calm	-	N/A	Scattered Clouds
12:56 PM	55.0 °F	-	43.0 °F	64%	30.18 in	10.0 mi	North	4.6 mph	-	N/A	Scattered Clouds
1:56 PM	55.9 °F	-	45.0 °F	67%	30.17 in	10.0 mi	NE	3.5 mph	-	N/A	Mostly Cloudy
2:56 PM	55.9 °F	-	41.0 °F	57%	30.16 in	10.0 mi	NNW	5.8 mph	-	N/A	Mostly Cloudy
3:56 PM	55.0 °F	-	42.1 °F	62%	30.17 in	10.0 mi	North	5.8 mph	-	N/A	Mostly Cloudy
4:56 PM	54.0 °F	-	39.9 °F	59%	30.17 in	10.0 mi	NNW	6.9 mph	-	N/A	Mostly Cloudy
5:56 PM	51.1 °F	-	41.0 °F	68%	30.16 in	10.0 mi	WNW	5.8 mph	-	N/A	Scattered Clouds
6:56 PM	52.0 °F	-	41.0 °F	66%	30.17 in	10.0 mi	Calm	Calm	-	N/A	Mostly Cloudy
7:56 PM	53.1 °F	-	37.9 °F	57%	30.16 in	10.0 mi	NE	5.8 mph	-	N/A	Mostly Cloudy
8:56 PM	51.1 °F	-	39.9 °F	66%	30.17 in	10.0 mi	ESE	3.5 mph	-	N/A	Mostly Cloudy
9:56 PM	51.1 °F	-	37.0 °F	59%	30.17 in	10.0 mi	ENE	4.6 mph	-	N/A	Scattered Clouds
10:56 PM	46.9 °F	-	41.0 °F	80%	30.17 in	10.0 mi	South	3.5 mph	-	N/A	Mostly Cloudy
11:56 PM	46.0 °F	44.8 °F	39.9 °F	79%	30.15 in	10.0 mi	SSE	3.5 mph	-	N/A	Mostly Cloudy
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