Portsmouth Rhode Island Weather Almanac
Tuesday, May 13, 2025
Partly Cloudy, Warmer
		Climate Normal Period								Climate Record Period
		1991 - 2020								1893 - 2025
		May 13								Record					Record
Observed Daily Data		2025		2024		Norm		Depart		Highest					Lowest
Maximum Temperature		71		64		64		+7		85		in	1956		43		in	1914
Minimum Temperature		54		48		48		+6		56		in	2022		37		in	2020
Average Temperature		63		56		56		+7		67		in	2023		41		in	1914
Month Avg Max Temperature		67.4		61.2		62.0		+5.4		72.6		in	2001		50.9		in	1917
Month Avg Min Temperature		51.5		45.5		45.9		+5.5		51.5		in	2025		39.4		in	1917
Month Average Temperature		59.5		53.6		54.0		+5.5		61.6		in	1930		45.4		in	1917
High Heat Index										83		in	1956
Low Wind Chill															31		in	2020
Heating Degree Days		2		9		9		-7		24		in	1914		0		in	2023
Month Heating DD		71		148		143		-72		255		in	1917		56		in	1930
Season Heating DD		4886		4879		5316		-430		6378		in	1905		4429		in	2012
Cooling Degree Days		0		0		0		+0		2		in	2023		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		55		53		52		+3		66		in	2022		31		in	1967
Minimum Dew Point		43		43		41		+2		56		in	2022		19		in	2005
Average  Dew Point		49		48		46		+3		61		in	2022		28		in	2020
Month Avg Max Dew Point		57.8		52.0		50.2		+7.6		57.8		in	2025		39.8		in	1952
Month Avg Min Dew Point		45.9		41.8		38.5		+7.4		46.8		in	1998		27.4		in	1966
Month Average Dew Point		52.2		47.2		44.3		+7.8		52.2		in	2025		34.0		in	1966
Precipitation		.00		.00		.11		-.11		2.36		in	2006
One Hour Rain		.00		.00						1.07		in	2006
Half Hour Rain		.00		.00						.80		in	2006
Hourly Rain Rate		.00		.00						4.97		in	2006
Month Precipitation		2.90		1.67		1.50		+1.40		4.94		in	1989		T		in	2001
Year Precipitation		15.70		24.59		17.23		-1.53		31.75		in	1983		10.18		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 13								Record					Record
Observed Daily Data		2025		2024		Norm		Depart		Highest					Lowest
Maximum Humidity		93%		93%		89%		+4%		100%		in	2022		55%		in	1967
Minimum Humidity		38%		50%		52%		-14%		94%		in	1979		20%		in	2007
Average Humidity		66%		72%		71%		-5%		97%		in	1979		41%		in	1977
Maximum Barometer		30.26		30.08		30.06		+00.20		30.50		in	1987		29.66		in	1952
Minimum Barometer		30.14		29.98		29.82		+00.32		30.31		in	1962		29.39		in	1974
Average Barometer		30.20		30.03		29.95		+00.25		30.36		in	1962		29.55		in	1977
Average Wind		6.9		6.9		7.0		-0.1		13.3		in	2008		3.0		in	1997
Direction		SE		SSW		S				NNE					SSE
High Wind Gust		22		23		23		-1		46		in	2008		15		in	2022
Direction		E		SSW		SSW				NNE					S
Maximum Water Temp		58.1		56.5		54.3		+3.8		59.5		in	2023		46.0		in	2020
Minimum Water Temp		55.6		52.7		51.2		+4.4		56.5		in	2023		43.5		in	2020
Average Water Temp		56.9		54.6		52.8		+4.1		58.0		in	2023		44.8		in	2020
Sunrise/ AM Twilight		5:27:14 AM						4:55:23 AM
Sunset / PM Twilight		7:55:56 PM						8:27:48 PM
Length Of Day		14:28:57
Special Conditions		None
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