Portsmouth Rhode Island Weather Almanac
Friday, May 16, 2025
Cloudy to Mostly Cloudy PM, Light Winds, Humid and Warmer
		Climate Normal Period								Climate Record Period
		1991 - 2020								1893 - 2025
		May 16								Record					Record
Observed Daily Data		2025		2024		Norm		Depart		Highest					Lowest
Maximum Temperature		72		59		65		+7		81		in	1951		48		in	1958
Minimum Temperature		58		55		48		+10		59		in	2014		36		in	1936
Average Temperature		65		57		57		+8		68		in	1896		46		in	1936
Month Avg Max Temperature		68.1		61.6		62.5		+5.6		70.2		in	1993		52.8		in	1917
Month Avg Min Temperature		52.4		46.9		46.3		+6.1		52.4		in	2025		40.2		in	1967
Month Average Temperature		60.4		54.5		54.4		+5.9		60.4		in	2025		46.8		in	1917
High Heat Index										81		in	1951
Low Wind Chill															34		in	2016
Heating Degree Days		0		8		8		-8		19		in	1936		0		in	2025
Month Heating DD		74		168		169		-95		292		in	1917		74		in	2025
Season Heating DD		4889		4899		5342		-453		6409		in	1905		4441		in	2012
Cooling Degree Days		0		0		0		+0		3		in	1896		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		66		58		53		+13		66		in	2025		35		in	2016
Minimum Dew Point		57		53		42		+15		58		in	2014		21		in	1987
Average  Dew Point		62		56		48		+14		62		in	2025		30		in	1987
Month Avg Max Dew Point		58.9		53.3		50.6		+8.3		58.9		in	2025		40.3		in	1966
Month Avg Min Dew Point		47.5		43.4		39.1		+8.4		47.5		in	2025		27.6		in	1966
Month Average Dew Point		53.5		48.6		44.9		+8.6		53.5		in	2025		33.9		in	1966
Precipitation		.00		2.43		.10		-.10		2.43		in	2024
One Hour Rain		.00		.54						.81		in	2012
Half Hour Rain		.00		.36						.57		in	2012
Hourly Rain Rate		.00		1.89						4.72		in	2012
Month Precipitation		4.46		4.89		1.81		+2.65		6.51		in	2006		.02		in	2015
Year Precipitation		17.26		27.81		17.54		-.28		33.65		in	1983		10.59		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 16								Record					Record
Observed Daily Data		2025		2024		Norm		Depart		Highest					Lowest
Maximum Humidity		97%		99%		91%		+6%		100%		in	2009		61%		in	1960
Minimum Humidity		78%		95%		55%		+23%		95%		in	2024		21%		in	1987
Average Humidity		88%		97%		73%		+15%		97%		in	2024		44%		in	1987
Maximum Barometer		29.82		29.89		30.07		-00.25		30.61		in	1992		29.67		in	1954
Minimum Barometer		29.70		29.67		29.82		-00.12		30.36		in	2003		29.48		in	2006
Average Barometer		29.76		29.78		29.94		-00.18		30.41		in	2003		29.60		in	1997
Average Wind		5.4		13.5		6.8		-1.4		15.8		in	1985		2.2		in	1975
Direction		S		NE		S				SSW					SSE
High Wind Gust		21		30		23		-2		48		in	1929		12		in	1975
Direction		SSW		E		SSW				W					NNE
Maximum Water Temp		59.5		54.5		55.3		+4.2		60.6		in	2007		50.0		in	2020
Minimum Water Temp		56.1		52.2		51.9		+4.2		56.7		in	2023		45.0		in	2020
Average Water Temp		57.8		53.4		53.6		+4.2		58.3		in	2023		47.5		in	2020
Sunrise/ AM Twilight		5:24:18 AM						4:52:12 AM
Sunset / PM Twilight		7:58:57 PM						8:31:06 PM
Length Of Day		14:34:53
Special Conditions		Fog
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