Portsmouth Rhode Island Weather Almanac
Friday, April 21, 2023
Partly Cloudy early, Clear Day to Partly Cloudy PM, Light Winds, Warmer
		Climate Normal Period								Climate Record Period
		1991 - 2020								1893 - 2023
		April 21, 2023								Record					Record
Observed Daily Data		2023		2022		Norm		Depart		Highest					Lowest
Maximum Temperature		58		56		57		+1		84		in	1957		40		in	1940
Minimum Temperature		43		36		41		+2		53		in	2012		24		in	1897
Average Temperature		51		46		49		+2		67		in	1957		36		in	1908
Month Avg Max Temperature		60.0		56.7		53.7		+6.3		61.7		in	1976		45.8		in	1907
Month Avg Min Temperature		42.6		40.6		38.1		+4.4		42.9		in	2002		31.6		in	1943
Month Average Temperature		51.6		48.9		46.2		+5.4		51.9		in	1945		39.3		in	1907
High Heat Index										83		in	1957
Low Wind Chill		43		36		35		+8							17		in	1897
Heating Degree Days		14		19		16		-2		29		in	1908		0		in	1957
Month HDD		287		339		395		-108		540		in	1907		275		in	1945
Season HDD		4354		4639		5045		-691		6124		in	1918		4151		in	2012
Cooling Degree Days		0		0		0		+0		2		in	1957				in
Month CDD		5		0		0		+5		13		in	1976				in
Year CDD		5		0		0		+5		13		in	1976				in
Maximum Dew Point		48		47		45		+3		62		in	1987		20		in	1981
Minimum Dew Point		38		29		32		+6		50		in	2012		5		in	1981
Average  Dew Point		43		38		38		+5		55		in	2019		13		in	1981
Month Avg Max Dew Point		47.0		44.5		41.4		+5.5		47.5		in	1987		32.1		in	1965
Month Avg Min Dew Point		33.3		30.7		28.1		+5.2		35.8		in	2010		18.0		in	1982
Month Average Dew Point		40.1		37.6		34.7		+5.4		41.1		in	2010		26.8		in	1975
Precipitation		.00		T		.14		-.14		3.19		in	1991
One Hour		.00		T						.39		in	2009
Hourly Rate		.00		.00						2.18		in	2009
Month Precipitation		1.01		3.27		3.01		-2.00		9.19		in	1983		.08		in	1966
Year Precipitation		14.51		16.17		14.47		+.04		28.46		in	1983		6.71		in	2012
Snow		0.0		0.0		0.0		+0.0		0.2		in	1947				in
Snow Depth		0		0						1		in	1904				in
Month Snow		0.0		0.0		0.5		-0.5		9.6		in	1996		0.0		in	2023
Season Snow		9.1		34.2		33.5		-24.4		84.1		in	1996		5.0		in	1998
		April 21, 2023								Record					Record
Observed Daily Data		2023		2022		Norm		Depart		Highest					Lowest
Maximum Humidity		96%		92%		88%		+8%		100%		in	2017		56%		in	1981
Minimum Humidity		53%		47%		46%		+7%		92%		in	2009		15%		in	1980
Average Humidity		75%		70%		67%		+8%		95%		in	2017		39%		in	1981
Maximum Barometer		30.18		30.56		30.10		+00.08		30.66		in	2013		29.54		in	1971
Minimum Barometer		30.11		30.32		29.84		+00.27		30.32		in	2022		29.11		in	1991
Average Barometer		30.15		30.44		29.97		+00.17		30.44		in	2022		29.38		in	1991
Average Wind		4.7		7.1		7.7		-3.0		14.3		in	1991		3.1		in	1997
Direction		SSE		S		S				NE					SSW
High Wind Gust		17		24		25		-8		42		in	1945		15		in	1955
Direction		S		SSW		SSW				NW					SSE
Maximum Water Temp		50.7		50.2		48.6		+2.1		53.8		in	2012		41.2		in	2020
Minimum Water Temp		48.4		47.1		45.3		+3.1		50.8		in	2012		40.3		in	2020
Average Water Temp		49.6		48.7		46.9		+2.6		52.3		in	2012		40.8		in	2020
Sunrise/ AM Twilight		5:56:21 AM						5:25:11 AM
Sunset / PM Twilight		7:31:56 PM						8:02:34 PM
Length Of Day		13:35:35
Special Conditions		None
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