Portsmouth Rhode Island Weather Almanac
Tuesday, December 31, 2019
Cloudy, Light Rain and Fog early, Breezy and Continued Warm
Climate Normal Period						Climate Record Period
1981- 2010						1893 - 2019
		December 31, 2019								Record					Record
Observed Daily Data		Observed		2018		Normal		Depart		Highest					Lowest
Maximum Temperature		42		45		39		+3		57		in	1936		9		in	1962
Minimum Temperature		37		28		24		+13		42		in	1965		-5		in	1917
Average Temperature		40		37		32		+8		48		in	1936		3		in	1962
Precipitation		.12		.52		.12		.00		1.37		in	1906
One Hour		.03		.15						.18		in	1989
Snow		0.0		0.0		0.1		-.12		5.1		in	2008
Snow Depth		0		0						15		in	1947
HDD		25		28		33		-8		62		in	1962		17		in	1936
CDD		0		0		0		+0		0		in
Maximum Dew Point		40		41		30		+10		51		in	1990		-5		in	1962
Minimum Dew Point		35		25		14		+21		35		in	2019		-18		in	1962
Average  Dew Point		38		33		22		+16		41		in	1992		-12		in	1962
Maximum Humidity		96%		94%		85%		+11%		100%		in	2002		57%		in	1955
Minimum Humidity		81%		60%		54%		+27%		94%		in	1989		22%		in	1991
Average Humidity		89%		77%		69%		+19%		97%		in	1989		41%		in	1991
Maximum Barometer		29.75		30.41		30.18		-00.43		30.76		in	1991		29.59		in	1976
Minimum Barometer		29.55		29.90		29.89		-00.34		30.59		in	1963		28.94		in	1948
Average Barometer		29.65		30.16		30.03		-00.38		30.67		in	1963		29.47		in	1962
Average Wind		9.2		7.5		7.6		+1.6		23.9		in	1962		1.3		in	1963
Direction		NNW		S		NNW				NW					NW
High Wind Gust		24		33		24		-0		57		in	1901		10		in	1967
Direction		#N/A		SSE		NNW				NW					NW
Wind Chill		31		28		13		+18							-32		in	1962
Maximum Water Temp		39.7		41.2		42.8		-3.1		49.2		in	2011		38.1		in	2000
Minimum Water Temp		37.8		39.7		40.3		-2.5		47.4		in	2015		34.5		in	2017
Average Water Temp		38.8		40.5		41.5		-2.8		47.7		in	2015		36.5		in	2017
Sunrise/ AM Twilight		7:11:33 AM						6:40:24 AM
Sunset / PM Twilight		4:25:44 PM						4:56:53 PM
Length Of Day		9:14:11
Special Conditions		Fog
Comments
		December 31, 2019								Record					Record
Month-to-Date Summary		Observed		2018		Normal		Depart		Highest					Lowest
Avg Maximum Temperature		42.4		43.2		42.1		+0.3		54.0		in	2015		30.8		in	1989
Avg Minimum Temperature		29.5		30.2		28.1		+1.4		41.4		in	2015		14.6		in	1989
Average Temperature		35.9		36.7		35.1		+0.8		47.7		in	2015		22.7		in	1989
Total Precipitation		7.52		4.37		4.34		+3.18		9.94		in	1936		.58		in	1955
Total Snow		8.4		0.2		7.5		+0.9		23.5		in	2009		T		in	2011
Total HDD		890		869		919		-29		1304		in	1989		527		in	2015
Total CDD		0		0		0		+0		0		in			0		in
Avg Maximum Dew Point		35.9		35.9		33.9		+2.0		49.3		in	2015		16.6		in	1989
Avg Minimum Dew Point		22.3		21.1		18.4		+3.9		35.9		in	2015		0.1		in	1989
Average  Dew Point		29.1		28.5		26.2		+3.0		42.6		in	2015		8.3		in	1989
		December 31, 2019								Record					Record
Year-to-Date Summary		Observed		2018		Normal		Depart		Highest					Lowest
Total Precipitation		57.02		53.60		48.19		+8.83		65.49		in	1983		27.66		in	1965
Total Snow (since Jul 1 19)		8.4		4.4		8.6		-0.2		23.7		in	1904		T		in	1999
Total HDD (since Jul 1 19)		1880		1929		1951		-71		2476		in	1904		1322		in	#N/A
Total CDD (since Jan 1)		731		775		563		+168		807		in	2016		290		in	1902
Hour-by-Hour Weather For December 31, 2019
Climate Weather for December 31
Weather History For December 31
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