Portsmouth Rhode Island Weather Almanac
Tuesday, December 17, 2019
Cloudy, Light Snow and Freezing Rain AM then Light Rain, Foggy and Cooler
Climate Normal Period						Climate Record Period
1981- 2010						1893 - 2019
		December 17, 2019								Record					Record
Observed Daily Data		Observed		2018		Normal		Depart		Highest					Lowest
Maximum Temperature		35		41		41		-6		58		in	2015		18		in	1932
Minimum Temperature		28		36		27		+1		44		in	1996		-1		in	1942
Average Temperature		32		39		34		-2		50		in	1928		10		in	1919
Precipitation		.45		.02		.14		+.31		3.13		in	1973
One Hour		.08		.01						.95		in	2000
Snow		0.3		0.0		0.1		+.16		4.0		in	1961
Snow Depth		0		0						12		in	1904
HDD		33		26		30		+3		55		in	1919		15		in	1928
CDD		0		0		0		+0		0		in
Maximum Dew Point		34		40		34		+1		58		in	1973		2		in	1951
Minimum Dew Point		19		30		18		+1		43		in	1996		-12		in	1979
Average  Dew Point		27		35		26		+1		48		in	1996		-2		in	1951
Maximum Humidity		96%		96%		85%		+11%		100%		in	2016		60%		in	2009
Minimum Humidity		60%		67%		56%		+4%		94%		in	1996		24%		in	1979
Average Humidity		78%		82%		71%		+7%		97%		in	1996		50%		in	1953
Maximum Barometer		30.16		29.66		30.13		+00.03		30.68		in	1899		29.64		in	1976
Minimum Barometer		29.59		29.57		29.77		-00.18		30.32		in	1949		28.93		in	1970
Average Barometer		29.88		29.62		29.95		-00.07		30.42		in	1949		29.39		in	1973
Average Wind		8.9		13.5		8.4		+0.5		19.7		in	2000		1.2		in	1962
Direction		NNE		WNW		WNW				SSE					NNE
High Wind Gust		26		29		26		-0		53		in	2000		10		in	1962
Direction		NNW		NNE		WNW				WSW					NNW
Wind Chill		21		26		17		+4							-9		in	1972
Maximum Water Temp		41.5		44.2		45.6		-4.1		52.3		in	2011		41.3		in	2013
Minimum Water Temp		39.4		42.6		43.0		-3.6		49.6		in	2015		38.4		in	2010
Average Water Temp		40.5		43.4		44.3		-3.9		50.5		in	2011		40.2		in	2013
Sunrise/ AM Twilight		7:06:22 AM						6:35:04 AM
Sunset / PM Twilight		4:17:10 PM						4:48:28 PM
Length Of Day		9:10:48
Special Conditions		Fog, Freezing Rain
Comments
		December 17, 2019								Record					Record
Month-to-Date Summary		Observed		2018		Normal		Depart		Highest					Lowest
Avg Maximum Temperature		43.3		42.2		44.1		-0.8		54.6		in	2015		30.5		in	1904
Avg Minimum Temperature		30.2		29.5		30.4		-0.1		42.0		in	2015		16.5		in	1989
Average Temperature		36.8		35.9		37.2		-0.4		48.3		in	2015		24.6		in	1904
Total Precipitation		5.27		1.95		2.49		+2.78		7.74		in	1936		.27		in	1998
Total Snow		8.3		T		3.4		+4.9		20.6		in	1981		0.0		in	2015
Total HDD		475		490		468		+7		683		in	1904		279		in	2015
Total CDD		0		0		0		+0		0		in			0		in
Avg Maximum Dew Point		38.4		34.1		36.0		+2.4		49.1		in	2015		18.4		in	1989
Avg Minimum Dew Point		22.7		20.2		20.9		+1.8		37.6		in	2015		-0.8		in	1989
Average  Dew Point		30.6		27.1		28.5		+2.1		43.4		in	2015		8.8		in	1989
		December 17, 2019								Record					Record
Year-to-Date Summary		Observed		2018		Normal		Depart		Highest					Lowest
Total Precipitation		54.77		51.18		46.34		+8.43		63.81		in	1983		27.14		in	1965
Total Snow (since Jul 1 19)		8.3		4.2		4.5		+3.8		21.1		in	1898		0.0		in	2015
Total HDD (since Jul 1 19)		1465		1550		1500		-35		1995		in	1904		1074		in	2015
Total CDD (since Jan 1)		731		775		563		+168		807		in	2016		290		in	1902
Hour-by-Hour Weather For December 17, 2019
Climate Weather for December 17
Weather History For December 17
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