Portsmouth Rhode Island Weather Almanac
Thursday, December 12, 2019
Clear to Partly Cloudy PM, Dry and Colder
Climate Normal Period						Climate Record Period
1981- 2010						1893 - 2019
		December 12, 2019								Record					Record
Observed Daily Data		Observed		2018		Normal		Depart		Highest					Lowest
Maximum Temperature		31		39		43		-12		62		in	2015		17		in	1905
Minimum Temperature		24		25		29		-5		49		in	2015		3		in	1988
Average Temperature		28		32		36		-8		56		in	2015		12		in	1988
Precipitation		.00		.00		.14		-.14		1.46		in	2008
One Hour		.00		.00						.42		in	2008
Snow		0.0		0.0		0.1		-.14		6.1		in	1960
Snow Depth		4		0						8		in	1981
HDD		37		33		28		+9		53		in	1988		9		in	2015
CDD		0		0		0		+0		0		in
Maximum Dew Point		24		27		35		-11		59		in	2008		2		in	1988
Minimum Dew Point		15		5		20		-5		41		in	2015		-15		in	1988
Average  Dew Point		20		16		27		-7		47		in	1949		-7		in	1988
Maximum Humidity		86%		77%		89%		-3%		100%		in	2016		50%		in	1975
Minimum Humidity		5%		38%		58%		-53%		95%		in	1949		28%		in	1977
Average Humidity		46%		58%		73%		-28%		98%		in	1949		40%		in	1975
Maximum Barometer		30.72		30.34		30.17		+00.55		30.72		in	2019		29.47		in	1951
Minimum Barometer		30.38		29.87		29.82		+00.56		30.50		in	2006		28.95		in	1944
Average Barometer		30.55		30.11		30.00		+00.55		30.57		in	2006		29.40		in	1951
Average Wind		8.6		10.7		8.0		+0.6		24.4		in	1960		1.0		in	1997
Direction		NW		NNW		WNW				N					WNW
High Wind Gust		25		31		25		-0		59		in	1960		6		in	1997
Direction		NW		NNW		WNW				N					WNW
Wind Chill		12		15		20		-8							-12		in	1988
Maximum Water Temp		42.2		44.2		46.8		-4.6		52.3		in	2011		42.2		in	2019
Minimum Water Temp		39.9		40.6		44.3		-4.4		50.4		in	2015		39.9		in	2019
Average Water Temp		41.1		42.4		45.5		-4.4		50.7		in	2015		41.1		in	2019
Sunrise/ AM Twilight		7:02:55 AM						6:31:42 AM
Sunset / PM Twilight		4:15:48 PM						4:47:00 PM
Length Of Day		9:12:53
Special Conditions		None
Comments
		December 12, 2019								Record					Record
Month-to-Date Summary		Observed		2018		Normal		Depart		Highest					Lowest
Avg Maximum Temperature		42.8		41.5		44.9		-2.2		54.6		in	1953		30.8		in	1904
Avg Minimum Temperature		29.2		27.8		31.3		-2.1		40.7		in	2015		16.4		in	1989
Average Temperature		36.0		34.6		38.1		-2.1		47.2		in	2015		25.3		in	1904
Total Precipitation		3.24		1.15		1.79		+1.45		6.47		in	1936		T		in	1988
Total Snow		8.0		T		2.3		+5.7		17.0		in	1981		0.0		in	2015
Total HDD		345		361		320		+25		474		in	1904		210		in	2015
Total CDD		0		0		0		+0		0		in			0		in
Avg Maximum Dew Point		37.3		31.3		36.8		+0.5		47.4		in	2015		19.6		in	1989
Avg Minimum Dew Point		21.9		17.5		21.9		-0.0		36.8		in	2015		-0.5		in	1989
Average  Dew Point		29.6		24.4		29.4		+0.2		42.1		in	2015		9.5		in	1989
		December 12, 2019								Record					Record
Year-to-Date Summary		Observed		2018		Normal		Depart		Highest					Lowest
Total Precipitation		52.74		50.38		45.64		+7.10		62.00		in	1983		26.39		in	1965
Total Snow (since Jul 1 19)		8.0		4.2		3.4		+4.6		20.5		in	1898		0.0		in	2015
Total HDD (since Jul 1 19)		1335		1421		1352		-17		1786		in	1904		1005		in	2015
Total CDD (since Jan 1)		731		775		563		+168		807		in	2016		290		in	1902
Hour-by-Hour Weather For December 12, 2019
Climate Weather for December 12
Weather History For December 12
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