Portsmouth Rhode Island Weather Almanac
Sunday, April 21, 2024
Clear early, Partly Cloudy Day to Mostly Cloudy PM, Cooler
		Climate Normal Period								Climate Record Period
		1991 - 2020								1893 - 2024
		April 21, 2024								Record					Record
Observed Daily Data		2024		2023		Norm		Depart		Highest					Lowest
Maximum Temperature		51		58		57		-6		84		in	1957		40		in	1940
Minimum Temperature		38		43		41		-3		53		in	2012		24		in	1897
Average Temperature		45		51		49		-4		67		in	1957		36		in	1908
Month Avg Max Temperature		54.4		60.0		53.7		+0.7		61.7		in	1976		45.8		in	1907
Month Avg Min Temperature		40.6		42.6		38.1		+2.4		42.9		in	2002		31.6		in	1943
Month Average Temperature		47.8		51.6		46.2		+1.6		51.9		in	1945		39.3		in	1907
High Heat Index										83		in	1957
Low Wind Chill		33		43		35		-2							17		in	1897
Heating Degree Days		20		14		16		+4		29		in	1908		0		in	1957
Month Heating DD		362		287		395		-33		540		in	1907		275		in	1945
Season Heating DD		4591		4354		5076		-485		6124		in	1918		4151		in	2012
Cooling Degree Days		0		0		0		+0		2		in	1957		0		in	Many
Month Cooling DD		0		5		0		+0		13		in	1976		0		in	Many
Year Cooling DD		0		5		0		+0		13		in	1976		0		in	Many
Maximum Dew Point		36		48		45		-9		62		in	1987		20		in	1981
Minimum Dew Point		30		38		32		-2		50		in	2012		5		in	1981
Average  Dew Point		33		43		38		-5		55		in	2019		13		in	1981
Month Avg Max Dew Point		43.9		47.0		41.4		+2.5		47.5		in	1987		32.1		in	1965
Month Avg Min Dew Point		34.7		33.3		28.1		+6.6		35.8		in	2010		18.0		in	1982
Month Average Dew Point		39.3		40.1		34.7		+4.6		41.1		in	2010		26.8		in	1975
Precipitation		.00		.00		.14		-.14		3.19		in	1991
One Hour Rain		.00		.00						.39		in	2009
Half Hour Rain		.00		.00						.22		in	2009
Hourly Rain Rate		.00		.00						2.18		in	2009
Month Precipitation		3.98		1.01		3.01		+.97		9.19		in	1983		.08		in	1966
Year Precipitation		22.82		14.51		14.60		+8.22		28.46		in	1983		6.71		in	2012
Snow		0.0		0.0		0.0		+0.0		0.2		in	1947
Snow Depth		0		0		0		+0		1		in	1904
Month Snow		0.0		0.0		0.5		-0.5		9.6		in	1996		0.0		in	2024
Season Snow		12.7		9.1		33.8		-21.1		84.1		in	1996		5.0		in	1998
		April 21, 2024								Record					Record
Observed Daily Data		2024		2023		Norm		Depart		Highest					Lowest
Maximum Humidity		74%		96%		88%		-14%		100%		in	2017		56%		in	1981
Minimum Humidity		49%		53%		46%		+3%		92%		in	2009		15%		in	1980
Average Humidity		62%		75%		67%		-5%		95%		in	2017		39%		in	1981
Maximum Barometer		30.01		30.18		30.10		-00.09		30.66		in	2013		29.54		in	1971
Minimum Barometer		29.96		30.11		29.84		+00.12		30.32		in	2022		29.11		in	1991
Average Barometer		29.99		30.15		29.97		+00.02		30.44		in	2022		29.38		in	1991
Average Wind		8.0		4.7		7.7		+0.3		14.3		in	1991		3.1		in	1997
Direction		NW		SSE		S				NE					SSW
High Wind Gust		24		17		25		-1		42		in	1945		15		in	1955
Direction		WNW		S		SSW				NW					SSE
Maximum Water Temp		48.9		50.7		48.6		+0.3		53.8		in	2012		41.2		in	2020
Minimum Water Temp		47.1		48.4		45.4		+1.7		50.8		in	2012		40.3		in	2020
Average Water Temp		48.0		49.6		47.0		+1.0		52.3		in	2012		40.8		in	2020
Sunrise/ AM Twilight		5:55:13 AM						5:25:11 AM
Sunset / PM Twilight		7:32:46 PM						8:02:17 PM
Length Of Day		13:37:33
Special Conditions		None
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