Portsmouth Rhode Island Weather Almanac
Tuesday, May 11, 2021
Mostly Cloudy early, Clear Day to Mostly Cloudy PM and Warmer
Climate Normal Period						Climate Record Period
1991- 2020						1893 - 2021
		May 11, 2021								Record					Record
Observed Daily Data		2021		2020		Norm		Depart		Highest					Lowest
Maximum Temperature		65		55		63		+2		82		in	2001		46		in	1919
Minimum Temperature		48		44		47		+1		59		in	2015		34		in	1900
Average Temperature		57		50		55		+2		69		in	2001		44		in	1963
Month Avg Max Temperature		61.7		61.0		61.6		+0.1		72.6		in	2001		51.1		in	1917
Month Avg Min Temperature		45.8		43.6		45.6		+0.2		51.4		in	1930		39.1		in	1917
Month Average Temperature		54.1		52.5		53.7		+0.4		62.1		in	1930		45.4		in	1917
HDD		8		15		10		-2		21		in	1963		0		in	2015
Month HDD		120		137		124		-4		216		in	1917		44		in	1930
Season HDD		4929		4958		5297		-368		6359		in	1905		4418		in	2012
CDD		0		0		0		+0		4		in	2001		0		in
Month CDD		0		0		0		+0		23		in	2001		0		in	2021
Year CDD		0		0		0		+0		23		in	2001		0		in	2021
Maximum Dew Point		46		49		52		-6		65		in	2015		32		in	1966
Minimum Dew Point		30		41		40		-10		59		in	2015		19		in	1966
Average  Dew Point		38		45		46		-8		62		in	2015		26		in	1966
Month Avg Max Dew Point		48.9		47.0		49.8		-0.9		56.2		in	1998		37.8		in	1952
Month Avg Min Dew Point		37.6		32.6		38.2		-0.5		48.6		in	1998		26.2		in	1968
Month Average Dew Point		43.4		40.0		44.0		-0.6		52.4		in	1998		32.7		in	1968
Precipitation		.00		.07		.11		-.11		1.54		in	1989
One Hour		.00		.06						.41		in	1951
Hourly Rate		.00		.10						2.70		in	2013
Month Precipitation		2.36		1.53		1.28		+1.08		4.71		in	1989		.00		in	2015
Year Precipitation		14.06		17.73		17.01		-2.95		31.68		in	1983		10.12		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 11, 2021								Record					Record
Observed Daily Data		2021		2020		Norm		Depart		Highest					Lowest
Maximum Humidity		90%		91%		88%		+2%		100%		in	2015		55%		in	1966
Minimum Humidity		31%		71%		50%		-19%		97%		in	1989		22%		in	2001
Average Humidity		61%		81%		69%		-9%		99%		in	1989		40%		in	1966
Maximum Barometer		30.00		29.97		30.05		-00.05		30.43		in	1966		29.62		in	1954
Minimum Barometer		29.91		29.74		29.83		+00.08		30.30		in	2010		29.41		in	1990
Average Barometer		29.96		29.86		29.94		+00.02		30.36		in	2010		29.57		in	1954
Average Wind		7.3		8.9		7.5		-0.2		14.1		in	1986		3.1		in	2007
Direction		NW		S		SSW				NNE					SSE
High Wind Gust		24		23		25		-1		43		in	1945		14		in	2007
Direction		NW		SSW		SSE				NW					S
High Heat Index										81		in	1993
Wind Chill				39											35		in	1945
Maximum Water Temp		52.9		44.4		53.8		-0.9		59.5		in	2007		44.4		in	2020
Minimum Water Temp		50.7		43.2		50.5		+0.2		55.7		in	2013		43.2		in	2020
Average Water Temp		51.8		43.8		52.1		-0.3		56.5		in	2013		43.8		in	2020
Sunrise/ AM Twilight		5:28:52 AM						4:57:39 AM
Sunset / PM Twilight		7:54:20 PM						8:25:34 PM
Length Of Day		14:25:28
Special Conditions		None
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