Portsmouth Rhode Island Weather Almanac
Monday, May 19, 2025
Mostly Cloudy early, Partly Cloudy Day to Cloudy PM, Very Windy and Cooler
		Climate Normal Period								Climate Record Period
		1991 - 2020								1893 - 2025
		May 19								Record					Record
Observed Daily Data		2025		2024		Norm		Depart		Highest					Lowest
Maximum Temperature		66		58		66		+0		83		in	2017		47		in	1950
Minimum Temperature		50		51		49		+1		61		in	2017		34		in	1981
Average Temperature		58		55		58		+0		72		in	2017		46		in	1994
Month Avg Max Temperature		68.4		61.5		63.0		+5.4		69.0		in	2001		55.1		in	1917
Month Avg Min Temperature		52.8		47.7		46.7		+6.1		52.8		in	2025		40.9		in	1967
Month Average Temperature		60.7		54.9		54.9		+5.8		60.7		in	2025		48.5		in	1917
High Heat Index										85		in	2017
Low Wind Chill		43		45											31		in	1981
Heating Degree Days		7		10		7		+0		19		in	1994		0		in	2021
Month Heating DD		81		192		192		-111		314		in	1917		81		in	2025
Season Heating DD		4896		4923		5365		-469		6444		in	1905		4458		in	2012
Cooling Degree Days		0		0		0		+0		7		in	2017		0		in	All
Month Cooling DD		0		0		0		+0		27		in	2001		0		in	Many
Year Cooling DD		0		0		0		+0		27		in	2001		0		in	Many
Maximum Dew Point		53		54		54		-1		68		in	2017		36		in	1981
Minimum Dew Point		41		48		43		-2		57		in	2011		27		in	1981
Average  Dew Point		47		51		49		-2		61		in	2011		32		in	1981
Month Avg Max Dew Point		59.1		53.8		51.2		+7.9		59.1		in	2025		41.8		in	1966
Month Avg Min Dew Point		47.9		44.1		39.7		+8.3		47.9		in	2025		29.8		in	1966
Month Average Dew Point		53.8		49.2		45.4		+8.4		53.8		in	2025		35.8		in	1966
Precipitation		.00		.01		.10		-.10		1.56		in	1901
One Hour Rain		.00		.01						.89		in	2011
Half Hour Rain		.00		.01						.66		in	2011
Hourly Rain Rate		.00		.00						5.76		in	2011
Month Precipitation		4.51		5.04		2.11		+2.40		6.87		in	2006		.09		in	2001
Year Precipitation		17.31		27.96		17.84		-.53		33.69		in	1983		10.75		in	1927
Snow		0.0		0.0		0.0		+0.0		0.0		in			0.0		in	Many
Snow Depth		0		0		0				0		in			0		in	Many
Month Snow		0.0		0.0		T				1.7		in	1977		0.0		in	Many
Season Snow		11.9		12.7		33.8		21.9		84.1		in	1996		5.0		in	1998
		May 19								Record					Record
Observed Daily Data		2025		2024		Norm		Depart		Highest					Lowest
Maximum Humidity		81%		96%		92%		-11%		100%		in	2018		66%		in	1955
Minimum Humidity		58%		82%		57%		+1%		95%		in	2015		23%		in	2003
Average Humidity		70%		89%		75%		-5%		98%		in	2015		48%		in	1955
Maximum Barometer		29.78		30.05		30.08		-00.30		30.57		in	1983		29.49		in	1976
Minimum Barometer		29.53		29.94		29.87		-00.34		30.30		in	2009		29.22		in	1976
Average Barometer		29.66		30.00		29.97		-00.32		30.42		in	1983		29.36		in	1976
Average Wind		15.7		13.7		7.1		+8.6		15.7		in	2025		2.4		in	1989
Direction		NW		NNE		NE				NW					SSE
High Wind Gust		37		28		24		+13		44		in	1964		12		in	1996
Direction		NNW		N		NE				SW					SSE
Maximum Water Temp		61.3		55.4		56.0		+5.3		61.3		in	2025		49.8		in	2020
Minimum Water Temp		59.7		54.1		53.0		+6.7		59.7		in	2025		45.7		in	2020
Average Water Temp		60.5		54.8		54.5		+6.0		60.5		in	2025		47.8		in	2020
Sunrise/ AM Twilight		5:21:37 AM						4:49:17 AM
Sunset / PM Twilight		8:01:52 PM						8:34:18 PM
Length Of Day		14:40:28
Special Conditions		None
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