Portsmouth Rhode Island Weather Almanac
Friday, December 20, 2019
Clear, Windy and Continued Very Cold
Climate Normal Period						Climate Record Period
1981- 2010						1893 - 2019
		December 20, 2019								Record					Record
Observed Daily Data		Observed		2018		Normal		Depart		Highest					Lowest
Maximum Temperature		30		49		40		-10		58		in	1957		11		in	1942
Minimum Temperature		17		34		27		-10		51		in	1957		-6		in	1942
Average Temperature		24		42		33		-9		55		in	1957		3		in	1942
Precipitation		.00		.00		.14		-.14		1.48		in	2002
One Hour		.00		.00						.49		in	2002
Snow		0.0		0.0		0.1		-.14		16.0		in	2009
Snow Depth		0		0						14		in	1904
HDD		41		23		31		+10		62		in	1942		10		in	1957
CDD		0		0		0		+0		0		in
Maximum Dew Point		17		45		33		-16		56		in	2002		-1		in	1983
Minimum Dew Point		6		27		17		-11		45		in	1957		-17		in	1955
Average  Dew Point		12		36		25		-13		49		in	1957		-8		in	1955
Maximum Humidity		70%		88%		84%		-14%		100%		in	2002		44%		in	1955
Minimum Humidity		55%		68%		56%		-1%		90%		in	1987		22%		in	1962
Average Humidity		63%		78%		70%		-8%		95%		in	1987		35%		in	1955
Maximum Barometer		30.59		30.18		30.19		+00.40		30.97		in	1990		29.50		in	1995
Minimum Barometer		30.30		29.97		29.85		+00.45		30.42		in	1979		29.09		in	1934
Average Barometer		30.45		30.08		30.02		+00.43		30.60		in	1990		29.43		in	1995
Average Wind		11.8		4.5		8.1		+3.7		17.5		in	2009		2.2		in	1993
Direction		NW		ESE		WNW				NW					SW
High Wind Gust		28		19		25		+3		48		in	1970		12		in	1985
Direction		WNW		ESE		WNW				WNW					NNW
Wind Chill		2		32		14		-12							-20		in	1955
Maximum Water Temp		40.8		41.5		45.0		-4.2		50.7		in	2006		40.8		in	2019
Minimum Water Temp		37.9		39.2		42.4		-4.5		47.3		in	2015		37.9		in	2019
Average Water Temp		39.4		40.4		43.7		-4.4		48.9		in	2011		39.4		in	2019
Sunrise/ AM Twilight		7:08:04 AM						6:36:45 AM
Sunset / PM Twilight		4:18:26 PM						4:49:46 PM
Length Of Day		9:10:22
Special Conditions		None
Comments
		December 20, 2019								Record					Record
Month-to-Date Summary		Observed		2018		Normal		Depart		Highest					Lowest
Avg Maximum Temperature		41.3		42.2		43.6		-2.3		53.3		in	2015		31.6		in	1904
Avg Minimum Temperature		28.3		29.1		29.9		-1.6		40.9		in	2015		16.4		in	1989
Average Temperature		34.8		35.6		36.7		-1.9		47.1		in	2015		24.7		in	1989
Total Precipitation		5.28		1.95		2.91		+2.37		9.27		in	1936		.27		in	1998
Total Snow		8.4		T		4.3		+4.1		21.3		in	1981		0.0		in	2015
Total HDD		598		581		561		+37		802		in	1989		352		in	2015
Total CDD		0		0		0		+0		0		in			0		in
Avg Maximum Dew Point		35.5		34.1		35.5		-0.0		47.6		in	2015		18.0		in	1989
Avg Minimum Dew Point		20.3		19.7		20.3		-0.0		35.4		in	2015		-0.2		in	1989
Average  Dew Point		27.9		26.9		27.9		-0.0		41.5		in	2015		8.9		in	1989
		December 20, 2019								Record					Record
Year-to-Date Summary		Observed		2018		Normal		Depart		Highest					Lowest
Total Precipitation		54.78		51.18		46.76		+8.02		63.81		in	1983		27.14		in	1965
Total Snow (since Jul 1 19)		8.4		4.2		5.4		+3.0		21.3		in	1898		0.0		in	2015
Total HDD (since Jul 1 19)		1588		1641		1593		-5		2098		in	1904		1147		in	2015
Total CDD (since Jan 1)		731		775		563		+168		807		in	2016		290		in	1902
Hour-by-Hour Weather For December 20, 2019
Climate Weather for December 20
Weather History For December 20
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