Portsmouth Rhode Island Weather Almanac
Wednesday, December 11, 2019
Cloudy, Light Rain to Moderate Snow & Fog AM, Mostly Cloudy Day to Clear PM, Seasonal Temps
Climate Normal Period						Climate Record Period
1981- 2010						1893 - 2019
		December 11, 2019								Record					Record
Observed Daily Data		Observed		2018		Normal		Depart		Highest					Lowest
Maximum Temperature		42		38		43		-1		65		in	1971		19		in	1977
Minimum Temperature		28		22		30		-2		47		in	2015		8		in	1977
Average Temperature		35		30		36		-1		53		in	2015		14		in	1977
Precipitation		.26		T		.15		+.11		2.79		in	1992
One Hour		.02		.00						.41		in	2008
Snow		3.8		T		0.2		+3.65		3.8		in	2019
Snow Depth		0		0						10		in	1981
HDD		30		35		28		+2		51		in	1977		12		in	2015
CDD		0		0		0		+0		0		in
Maximum Dew Point		40		27		35		+5		57		in	1966		-4		in	1977
Minimum Dew Point		23		13		20		+3		47		in	2015		-15		in	1980
Average  Dew Point		32		20		28		+4		52		in	2015		-9		in	1977
Maximum Humidity		95%		77%		86%		+9%		100%		in	2015		45%		in	1990
Minimum Humidity		72%		48%		56%		+16%		92%		in	2008		20%		in	1980
Average Humidity		84%		63%		71%		+13%		94%		in	2015		35%		in	1990
Maximum Barometer		30.38		30.20		30.15		+00.23		30.78		in	1983		29.42		in	2004
Minimum Barometer		30.05		29.89		29.83		+00.22		30.46		in	2011		29.18		in	1969
Average Barometer		30.22		30.05		29.99		+00.23		30.61		in	1983		29.35		in	1957
Average Wind		8.6		4.6		8.2		+0.4		21.9		in	1952		2.1		in	1996
Direction		NW		N		N				SE					ENE
High Wind Gust		22		14		26		-4		64		in	1943		13		in	2006
Direction		NNW		N		N				NW					W
Wind Chill		19		14		20		-1							-13		in	1977
Maximum Water Temp		42.6		44.1		46.9		-4.3		51.2		in	2011		42.6		in	2019
Minimum Water Temp		40.4		39.2		44.3		-3.9		50.4		in	2015		39.1		in	2002
Average Water Temp		41.5		41.7		45.6		-4.1		50.6		in	2015		41.2		in	2010
Sunrise/ AM Twilight		7:02:08 AM						6:30:57 AM
Sunset / PM Twilight		4:15:38 PM						4:46:49 PM
Length Of Day		9:13:30
Special Conditions		Dense Fog
Comments
		December 11, 2019								Record					Record
Month-to-Date Summary		Observed		2018		Normal		Depart		Highest					Lowest
Avg Maximum Temperature		43.8		41.7		45.1		-1.3		55.0		in	1953		30.5		in	1904
Avg Minimum Temperature		29.6		28.0		31.5		-1.8		41.4		in	1998		16.0		in	1989
Average Temperature		36.7		34.9		38.3		-1.5		48.0		in	1998		25.3		in	1904
Total Precipitation		3.24		1.15		1.65		+1.59		5.89		in	1936		.00		in	1946
Total Snow		8.0		T		2.1		+5.9		17.0		in	1981		0.0		in	2015
Total HDD		308		328		292		+16		434		in	1904		185		in	1998
Total CDD		0		0		0		+0		0		in			0		in
Avg Maximum Dew Point		38.5		31.7		37.0		+1.6		47.4		in	2001		19.1		in	1989
Avg Minimum Dew Point		22.5		18.6		22.2		+0.4		36.5		in	2015		-1.8		in	1989
Average  Dew Point		30.5		25.2		29.6		+1.0		41.8		in	2015		8.6		in	1989
		December 11, 2019								Record					Record
Year-to-Date Summary		Observed		2018		Normal		Depart		Highest					Lowest
Total Precipitation		52.74		50.38		45.50		+7.24		61.88		in	1983		26.29		in	1965
Total Snow (since Jul 1 19)		8.0		4.2		3.2		+4.8		19.5		in	1898		0.0		in	2015
Total HDD (since Jul 1 19)		1298		1388		1324		-26		1746		in	1904		996		in	2015
Total CDD (since Jan 1)		731		775		563		+168		807		in	2016		290		in	1902
Hour-by-Hour Weather For December 11, 2019
Climate Weather for December 11
Weather History For December 11
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