Portsmouth Rhode Island Weather Almanac
Friday, May 21, 2021
Mostly Cloudy & Light Fog early then Partly Cloudy and Continued Warm
Climate Normal Period						Climate Record Period
1991- 2020						1893 - 2021
		May 21, 2021								Record					Record
Observed Daily Data		2021		2020		Norm		Depart		Highest					Lowest
Maximum Temperature		69		62		67		+2		85		in	1921		47		in	1929
Minimum Temperature		50		39		50		+0		64		in	1903		38		in	2002
Average Temperature		60		51		58		+2		73		in	1996		45		in	1990
Month Avg Max Temperature		66.9		62.5		63.3		+3.5		69.1		in	1918		56.7		in	1966
Month Avg Min Temperature		47.2		43.9		47.0		+0.2		49.9		in	2018		41.4		in	1956
Month Average Temperature		57.3		53.5		55.2		+2.1		59.2		in	1930		49.6		in	1966
HDD		5		14		7		-2		20		in	1990		0		in	2013
Month HDD		162		241		206		-44		324		in	1966		127		in	1918
Season HDD		4971		5062		5379		-408		6467		in	1905		4465		in	2012
CDD		0		0		1		-1		8		in	1996		0		in
Month CDD		1		0		1		+0		27		in	2001		0		in	2020
Year CDD		1		0		1		+0		27		in	2001		0		in	2020
Maximum Dew Point		57		49		55		+2		70		in	1996		32		in	1967
Minimum Dew Point		47		37		44		+3		58		in	1986		25		in	1967
Average  Dew Point		52		43		50		+2		63		in	1996		29		in	1967
Month Avg Max Dew Point		49.9		47.6		51.5		-1.7		57.2		in	2004		42.0		in	1967
Month Avg Min Dew Point		38.9		34.2		40.1		-1.2		46.7		in	1953		30.0		in	1967
Month Average Dew Point		44.5		41.1		45.8		-1.3		50.7		in	1953		36.0		in	1967
Precipitation		.00		.00		.10		-.10		1.10		in	1986
One Hour		.00		.00						.48		in	1986
Hourly Rate		.00		.00						.22		in	2006
Month Precipitation		2.38		2.15		2.31		+.07		6.96		in	2006		.09		in	2001
Year Precipitation		14.08		18.35		18.04		-3.96		34.08		in	1983		10.81		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 21, 2021								Record					Record
Observed Daily Data		2021		2020		Norm		Depart		Highest					Lowest
Maximum Humidity		97%		94%		91%		+6%		100%		in	2013		60%		in	1967
Minimum Humidity		57%		47%		53%		+4%		96%		in	1954		14%		in	1992
Average Humidity		77%		71%		72%		+5%		98%		in	1954		45%		in	1967
Maximum Barometer		30.53		30.44		30.07		+00.46		30.53		in	2021		29.53		in	2008
Minimum Barometer		30.36		30.25		29.85		+00.51		30.36		in	2021		29.12		in	1973
Average Barometer		30.45		30.35		29.96		+00.49		30.45		in	2021		29.40		in	1973
Average Wind		5.0		5.9		6.3		-1.3		16.3		in	1985		2.1		in	1994
Direction		SSW		S		SSW				SSW					N
High Wind Gust		20		21		22		-2		37		in	1956		12		in	2016
Direction		S		SW		SW				NW					SSW
High Heat Index										84		in	1996
Wind Chill				39											35		in	2002
Maximum Water Temp		60.4		51.0		56.8		+3.6		60.6		in	2013		51.0		in	2020
Minimum Water Temp		57.4		47.3		53.3		+4.1		57.9		in	1998		47.3		in	2020
Average Water Temp		58.9		49.2		55.1		+3.8		59.1		in	1998		49.2		in	2020
Sunrise/ AM Twilight		5:19:44 AM						4:47:29 AM
Sunset / PM Twilight		8:04:07 PM						8:36:23 PM
Length Of Day		14:44:23
Special Conditions		Light Fotg
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