Portsmouth Rhode Island Weather Almanac
Sunday, May 16, 2021
Partly Cloudy, Light Rain 1-2pm, then Mostly Cloudy and Continued Warm
Climate Normal Period						Climate Record Period
1991- 2020						1893 - 2021
		May 16, 2021								Record					Record
Observed Daily Data		2021		2020		Norm		Depart		Highest					Lowest
Maximum Temperature		75		74		65		+10		81		in	1951		48		in	1958
Minimum Temperature		53		48		48		+5		59		in	2014		36		in	1936
Average Temperature		64		61		57		+7		68		in	1896		46		in	1936
Month Avg Max Temperature		64.7		62.3		62.5		+2.2		70.2		in	1993		52.8		in	1917
Month Avg Min Temperature		46.1		43.4		46.3		-0.3		50.2		in	1930		40.2		in	1967
Month Average Temperature		55.7		53.1		54.4		+1.3		60.2		in	1930		46.8		in	1917
HDD		1		4		8		-7		19		in	1936		0		in	1960
Month HDD		149		190		169		-20		292		in	1917		84		in	1993
Season HDD		4958		5011		5342		-384		6409		in	1905		4441		in	2012
CDD		0		0		0		+0		3		in	1896		0		in
Month CDD		0		0		0		+0		27		in	2001		0		in	2021
Year CDD		0		0		0		+0		27		in	2001		0		in	2021
Maximum Dew Point		48		60		53		-5		65		in	1972		35		in	2016
Minimum Dew Point		39		45		42		-3		58		in	2014		21		in	1987
Average  Dew Point		44		53		48		-4		59		in	2014		30		in	1959
Month Avg Max Dew Point		48.3		47.4		50.6		-2.3		56.3		in	2004		40.3		in	1966
Month Avg Min Dew Point		37.1		32.7		39.1		-2.0		45.7		in	1998		27.6		in	1966
Month Average Dew Point		42.9		40.3		44.9		-2.0		50.2		in	1998		33.9		in	1966
Precipitation		.01		.20		.10		-.09		1.52		in	1983
One Hour		.01		.13						.81		in	2012
Hourly Rate		.00		.74						4.72		in	2012
Month Precipitation		2.38		2.15		1.81		+.57		6.51		in	2006		.02		in	2015
Year Precipitation		14.08		18.35		17.54		-3.46		33.65		in	1983		10.59		in	1927
Snow		0.0		0.0		0.0		+0.0		0.0		in
Snow Depth		0		0								in
Month Snow		0.0		0.0		0.0		+0.0		1.7		in	1977		0.0		in
Season Snow		27.7		12.9		33.5		-5.8		84.1		in	1996		5.0		in	1998
		May 16, 2021								Record					Record
Observed Daily Data		2021		2020		Norm		Depart		Highest					Lowest
Maximum Humidity		70%		96%		91%		-21%		100%		in	2009		61%		in	1960
Minimum Humidity		31%		44%		55%		-24%		94%		in	1961		21%		in	1987
Average Humidity		51%		70%		73%		-22%		97%		in	1961		44%		in	1987
Maximum Barometer		30.25		30.27		30.07		+00.18		30.61		in	1992		29.67		in	1954
Minimum Barometer		30.19		29.79		29.83		+00.36		30.36		in	2003		29.48		in	2006
Average Barometer		30.22		30.03		29.95		+00.27		30.41		in	2003		29.60		in	1997
Average Wind		5.1		9.1		6.8		-1.7		15.8		in	1985		2.2		in	1975
Direction		SW		N		S				SSW					SSE
High Wind Gust		29		23		23		+6		48		in	1929		12		in	1975
Direction		SW		N		NNE				W					NNE
High Heat Index										81		in	1951
Wind Chill															34		in	2016
Maximum Water Temp		55.9		50.0		54.9		+1.0		60.6		in	2007		50.0		in	2020
Minimum Water Temp		54.0		45.0		51.5		+2.5		55.5		in	2012		45.0		in	2020
Average Water Temp		55.0		47.5		53.2		+1.8		57.1		in	2007		47.5		in	2020
Sunrise/ AM Twilight		5:23:57 AM						4:52:12 AM
Sunset / PM Twilight		7:59:21 PM						8:31:06 PM
Length Of Day		14:35:24
Special Conditions		None
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