Portsmouth Rhode Island Weather Almanac
Friday, May 28, 2021
Partly Cloudy to Cloudy Evening, Heavy Rain and Fog PM, Much Cooler
Climate Normal Period						Climate Record Period
1991- 2020						1893 - 2021
		May 28, 2021								Record					Record
Observed Daily Data		2021		2020		Norm		Depart		Highest					Lowest
Maximum Temperature		66		73		69		-3		88		in	1991		53		in	1917
Minimum Temperature		46		60		52		-6		62		in	1991		41		in	1994
Average Temperature		56		67		61		-5		75		in	1991		49		in	1907
Month Avg Max Temperature		68.1		64.7		64.5		+3.6		70.7		in	1991		57.1		in	2005
Month Avg Min Temperature		49.0		46.0		48.1		+1.0		52.0		in	2012		41.6		in	1967
Month Average Temperature		58.9		55.6		56.3		+2.5		59.8		in	1991		50.3		in	1967
HDD		9		0		4		+5		16		in	1907		0		in	2020
Month HDD		189		265		243		-54		413		in	1967		157		in	1918
Season HDD		4998		5086		5416		-418		6518		in	1905		4475		in	2012
CDD		0		2		1		-1		10		in	1991		0		in
Month CDD		17		3		8		+9		32		in	1991		0		in	2013
Year CDD		17		3		8		+9		32		in	1991		0		in	2013
Maximum Dew Point		50		67		58		-8		69		in	2012		42		in	1964
Minimum Dew Point		36		59		47		-11		61		in	2012		29		in	1980
Average  Dew Point		43		63		52		-9		65		in	2012		37		in	1964
Month Avg Max Dew Point		52.3		51.3		52.8		-0.5		57.6		in	2004		42.2		in	1967
Month Avg Min Dew Point		40.6		38.1		41.5		-0.9		48.0		in	2012		31.1		in	1967
Month Average Dew Point		46.6		44.9		47.1		-0.5		52.7		in	2012		36.6		in	1967
Precipitation		.59		.11		.10		+.49		2.48		in	1917
One Hour		.26		.10						.42		in	1959
Hourly Rate		.55		.47						.71		in	2004
Month Precipitation		3.00		2.79		3.01		-.01		8.33		in	1967		.35		in	2015
Year Precipitation		14.70		18.99		18.74		-4.04		35.09		in	1983		11.43		in	1905
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 28, 2021								Record					Record
Observed Daily Data		2021		2020		Norm		Depart		Highest					Lowest
Maximum Humidity		94%		97%		90%		+4%		100%		in	2011		58%		in	1952
Minimum Humidity		43%		76%		54%		-11%		93%		in	2004		23%		in	1980
Average Humidity		69%		87%		72%		-4%		97%		in	2004		45%		in	1952
Maximum Barometer		30.12		30.25		30.07		+00.05		30.56		in	1997		29.68		in	1951
Minimum Barometer		30.00		30.12		29.85		+00.15		30.26		in	1995		29.43		in	1986
Average Barometer		30.06		30.19		29.96		+00.10		30.37		in	1997		29.60		in	1977
Average Wind		6.8		7.9		6.0		+0.8		11.5		in	1954		1.7		in	1967
Direction		ENE		SSW		S				SW					N
High Wind Gust		24		22		21		+3		36		in	1954		11		in	1950
Direction		NNE		SSW		SW				SW					S
High Heat Index										92		in	1991
Wind Chill		40													38		in	1994
Maximum Water Temp		59.9		54.3		59.1		+0.8		67.1		in	2007		54.3		in	2020
Minimum Water Temp		56.1		50.7		55.1		+1.0		62.6		in	2007		50.1		in	2008
Average Water Temp		58.0		52.5		57.1		+0.9		64.9		in	2007		52.5		in	2020
Sunrise/ AM Twilight		5:15:08 AM						4:42:14 AM
Sunset / PM Twilight		8:10:13 PM						8:43:07 PM
Length Of Day		14:55:05
Special Conditions		Fog
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