Portsmouth Rhode Island Weather Almanac
Saturday, December 21, 2019
Clear and Cold early, Partly Cloudy Day to Mostly Cloudy and Warmer PM, Light Winds
Climate Normal Period						Climate Record Period
1981- 2010						1893 - 2019
		December 21, 2019								Record					Record
Observed Daily Data		Observed		2018		Normal		Depart		Highest					Lowest
Maximum Temperature		36		57		40		-4		58		in	1999		13		in	1955
Minimum Temperature		19		49		26		-7		49		in	2018		-3		in	1955
Average Temperature		28		53		33		-5		53		in	2018		5		in	1955
Precipitation		.00		.66		.14		-.14		2.05		in	1946
One Hour		.00		.09						.59		in	1993
Snow		0.0		0.0		0.1		-.14		7.2		in	1954
Snow Depth		0		0						20		in	2009
HDD		37		12		32		+5		60		in	1955		12		in	2018
CDD		0		0		0		+0		0		in
Maximum Dew Point		30		57		32		-2		57		in	2018		-12		in	1955
Minimum Dew Point		14		45		16		-2		45		in	2018		-23		in	1955
Average  Dew Point		22		51		24		-2		51		in	2018		-18		in	1955
Maximum Humidity		92%		100%		84%		+8%		100%		in	2018		44%		in	1955
Minimum Humidity		69%		84%		57%		+12%		96%		in	1972		22%		in	1955
Average Humidity		81%		92%		71%		+10%		98%		in	1972		33%		in	1955
Maximum Barometer		30.64		29.97		30.17		+00.47		30.94		in	1983		29.42		in	1978
Minimum Barometer		30.43		29.34		29.83		+00.60		30.50		in	1983		28.95		in	1973
Average Barometer		30.54		29.66		30.00		+00.53		30.72		in	1983		29.21		in	1976
Average Wind		4.5		16.3		9.0		-4.5		18.6		in	1976		2.7		in	1956
Direction		N		SSE		WNW				WNW					SW
High Wind Gust		15		38		27		-12		48		in	1957		12		in	1983
Direction		N		SE		WNW				S					NE
Wind Chill		10		44		16		-6							-25		in	1955
Maximum Water Temp		40.6		44.8		44.8		-4.2		50.2		in	2006		40.6		in	2019
Minimum Water Temp		37.5		41.4		42.1		-4.6		47.2		in	2011		37.2		in	2004
Average Water Temp		39.1		43.1		43.4		-4.4		48.4		in	2011		39.1		in	2019
Sunrise/ AM Twilight		7:08:34 AM						6:37:14 AM
Sunset / PM Twilight		4:18:56 PM						4:50:15 PM
Length Of Day		9:10:22
Special Conditions		None
Comments
		December 21, 2019								Record					Record
Month-to-Date Summary		Observed		2018		Normal		Depart		Highest					Lowest
Avg Maximum Temperature		41.0		42.9		43.4		-2.4		53.3		in	2015		31.6		in	1904
Avg Minimum Temperature		27.9		30.0		29.7		-1.8		40.7		in	2015		16.0		in	1989
Average Temperature		34.4		36.5		36.5		-2.0		47.0		in	2015		24.4		in	1989
Total Precipitation		5.28		2.61		3.05		+2.23		9.27		in	1936		.27		in	1998
Total Snow		8.4		T		4.6		+3.8		21.3		in	1981		0.0		in	2015
Total HDD		635		593		593		+42		849		in	1989		371		in	2015
Total CDD		0		0		0		+0		0		in			0		in
Avg Maximum Dew Point		35.2		35.2		35.4		-0.2		47.8		in	2015		17.8		in	1989
Avg Minimum Dew Point		20.0		20.9		20.1		-0.1		35.1		in	2015		-0.4		in	1989
Average  Dew Point		27.6		28.0		27.8		-0.1		41.4		in	2015		8.7		in	1989
		December 21, 2019								Record					Record
Year-to-Date Summary		Observed		2018		Normal		Depart		Highest					Lowest
Total Precipitation		54.78		51.84		46.90		+7.88		63.81		in	1983		27.14		in	1965
Total Snow (since Jul 1 19)		8.4		4.2		5.7		+2.7		21.3		in	1898		0.0		in	2015
Total HDD (since Jul 1 19)		1625		1653		1625		+0		2137		in	1904		1166		in	2015
Total CDD (since Jan 1)		731		775		563		+168		807		in	2016		290		in	1902
Hour-by-Hour Weather For December 21, 2019
Climate Weather for December 21
Weather History For December 21
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