Portsmouth Rhode Island Weather Almanac
Sunday, May 12, 2024
Mostly Cloudy, Calm Winds early then Cloudy, Light Rain Late, Cooler
		Climate Normal Period								Climate Record Period
		1991 - 2020								1893 - 2024
		May 12, 2024								Record					Record
Observed Daily Data		2024		2023		Norm		Depart		Highest					Lowest
Maximum Temperature		57		78		64		-7		80		in	2004		47		in	1949
Minimum Temperature		39		55		47		-8		59		in	2004		36		in	1907
Average Temperature		48		67		55		-7		70		in	2004		45		in	2010
Month Avg Max Temperature		60.9		65.1		61.8		-0.9		73.3		in	2001		51.2		in	1917
Month Avg Min Temperature		45.3		47.1		45.8		-0.4		51.0		in	1930		39.2		in	1917
Month Average Temperature		53.4		56.3		53.8		-0.4		61.6		in	1930		45.4		in	1917
High Heat Index										81		in	2004
Low Wind Chill		39													33		in	2020
Heating Degree Days		17				10		+7		20		in	2010		0		in	2023
Month Heating DD		139		106		134		+5		235		in	1917		53		in	1930
Season Heating DD		4870		4585		5338		-468		6367		in	1905		4427		in	2012
Cooling Degree Days		0		2		0		+0		5		in	2004		0		in	2024
Month Cooling DD		0		2		0		+0		27		in	2001		0		in	2024
Year Cooling DD		0		2		0		+0		27		in	2001		0		in	2024
Maximum Dew Point		47		58		52		-5		66		in	2015		37		in	1950
Minimum Dew Point		35		47		40		-5		54		in	2004		21		in	2005
Average  Dew Point		41		53		46		-5		59		in	2015		32		in	1963
Month Avg Max Dew Point		51.9		50.8		50.0		+1.9		55.3		in	1998		39.4		in	1952
Month Avg Min Dew Point		41.7		39.7		38.3		+3.3		47.7		in	1998		27.0		in	1966
Month Average Dew Point		47.1		45.6		44.2		+2.9		51.5		in	1998		33.3		in	1966
Precipitation		.03		T		.11		-.08		1.60		in	1968
One Hour Rain		.02		T						.44		in	1952
Half Hour Rain		.01		.00						.15		in	2019
Hourly Rain Rate		.05		.00						.65		in	2006
Month Precipitation		1.67		.67		1.39		+.28		4.93		in	1989		T		in	2001
Year Precipitation		24.59		17.90		17.25		+7.34		31.68		in	1983		10.18		in	1927
Snow		0.0		0.0		0.0		+0.0		0.0		in
Snow Depth		0		0		0		+0				in
Month Snow		0.0		0.0		0.0		+0.0		1.7		in	1977		0.0		in	Many
Season Snow		12.7		9.1		33.8		-21.1		84.1		in	1996		5.0		in	1998
		May 12, 2024								Record					Record
Observed Daily Data		2024		2023		Norm		Depart		Highest					Lowest
Maximum Humidity		95%		77%		89%		+6%		100%		in	2013		55%		in	1950
Minimum Humidity		70%		45%		52%		+18%		90%		in	2006		22%		in	2005
Average Humidity		83%		61%		70%		+12%		95%		in	2006		43%		in	1977
Maximum Barometer		29.98		30.06		30.05		-00.07		30.46		in	1990		29.58		in	2003
Minimum Barometer		29.88		29.94		29.82		+00.06		30.25		in	2022		29.41		in	1996
Average Barometer		29.93		30.00		29.93		-00.00		30.30		in	2022		29.53		in	2003
Average Wind		4.2		4.7		7.2		-3.0		18.4		in	1986		2.6		in	2009
Direction		S		SW		S				N					SSE
High Wind Gust		21		26		24		-3		53		in	1986		12		in	2009
Direction		SSW		SW		SSW				N					SSE
Maximum Water Temp		54.0		59.5		54.5		-0.5		59.6		in	2004		45.0		in	2020
Minimum Water Temp		52.0		55.2		50.6		+1.4		55.5		in	2013		42.8		in	2020
Average Water Temp		53.0		57.4		52.6		+0.4		57.4		in	2023		43.9		in	2020
Sunrise/ AM Twilight		5:28:16 AM						4:56:30 AM
Sunset / PM Twilight		7:55:10 PM						8:26:41 PM
Length Of Day		14:26:54
Special Conditions		None
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