Portsmouth Rhode Island Weather Almanac
Saturday, May 18, 2024
Cloudy, Light Rain and Fog, Windy and Much Cooler
		Climate Normal Period								Climate Record Period
		1991 - 2020								1893 - 2024
		May 18, 2024								Record					Record
Observed Daily Data		2024		2023		Norm		Depart		Highest					Lowest
Maximum Temperature		57		56		66		-9		82		in	2017		45		in	2007
Minimum Temperature		52		36		49		+3		62		in	2017		35		in	1983
Average Temperature		55		46		57		-2		72		in	2017		44		in	2007
Month Avg Max Temperature		61.7		64.0		62.8		-1.1		69.7		in	1993		54.1		in	1917
Month Avg Min Temperature		47.6		48.3		46.6		+0.9		50.2		in	1930		40.4		in	1967
Month Average Temperature		54.9		56.4		54.7		+0.2		59.9		in	1930		47.8		in	1917
High Heat Index										83		in	2017
Low Wind Chill				34											33		in	1981
Heating Degree Days		10		19		8		+2		21		in	2007		0		in	2021
Month Heating DD		182		168		185		-3		310		in	1917		96		in	1993
Season Heating DD		4913		4636		5389		-476		6439		in	1905		4454		in	2012
Cooling Degree Days		0		0		0		+0		7		in	2017		0		in	2024
Month Cooling DD		0		4		0		+0		27		in	2001		0		in	2024
Year Cooling DD		0		4		0		+0		27		in	2001		0		in	2024
Maximum Dew Point		56		40		54		+2		67		in	2017		33		in	1981
Minimum Dew Point		48		20		43		+5		57		in	2017		20		in	2023
Average  Dew Point		52		30		48		+4		62		in	2017		29		in	1981
Month Avg Max Dew Point		51.4		51.4		51.0		+0.4		56.4		in	2004		41.0		in	1966
Month Avg Min Dew Point		40.0		40.0		39.5		+0.5		46.3		in	1953		28.8		in	1966
Month Average Dew Point		46.0		46.0		45.2		+0.8		50.4		in	1998		34.9		in	1966
Precipitation		.14		.00		.10		+.04		1.93		in	2002
One Hour Rain		.09		.00						.40		in	1970
Half Hour Rain		.05		.00						.13		in	2010
Hourly Rain Rate		.30		.00						.82		in	2004
Month Precipitation		5.03		.67		2.01		+3.02		6.51		in	2006		.02		in	2015
Year Precipitation		27.95		17.90		17.87		+10.08		33.69		in	1983		10.69		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 18, 2024								Record					Record
Observed Daily Data		2024		2023		Norm		Depart		Highest					Lowest
Maximum Humidity		97%		80%		91%		+6%		100%		in	2018		63%		in	1981
Minimum Humidity		83%		29%		56%		+27%		91%		in	2004		25%		in	1983
Average Humidity		90%		55%		73%		+17%		96%		in	2004		45%		in	1981
Maximum Barometer		30.01		30.38		30.08		-00.07		30.50		in	1983		29.48		in	2008
Minimum Barometer		29.94		30.10		29.87		+00.07		30.34		in	2003		29.05		in	1985
Average Barometer		29.98		30.24		29.97		+00.00		30.37		in	2003		29.27		in	1985
Average Wind		12.3		8.3		6.3		+6.0		14.6		in	2000		1.9		in	1995
Direction		NNE		SSW		NNE				S					SSE
High Wind Gust		26		23		22		+4		41		in	2000		11		in	1995
Direction		NNE		SSW		SSE				SW					NW
Maximum Water Temp		56.3		56.3		55.6		+0.7		59.5		in	2017		50.5		in	2020
Minimum Water Temp		54.3		53.8		52.6		+1.7		56.6		in	2013		45.9		in	2020
Average Water Temp		55.3		55.1		54.1		+1.2		57.9		in	2013		48.2		in	2020
Sunrise/ AM Twilight		5:22:29 AM						4:50:13 AM
Sunset / PM Twilight		8:01:08 PM						8:33:15 PM
Length Of Day		14:38:39
Special Conditions		Fog
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