Portsmouth Rhode Island Weather Almanac
Thursday, May 18, 2023
Clear, Breezy, Dry and Colder
		Climate Normal Period								Climate Record Period
		1991 - 2020								1893 - 2023
		May 18, 2023								Record					Record
Observed Daily Data		2023		2022		Norm		Depart		Highest					Lowest
Maximum Temperature		56		70		66		-10		82		in	2017		45		in	2007
Minimum Temperature		36		52		49		-13		62		in	2017		35		in	1983
Average Temperature		46		61		57		-11		72		in	2017		44		in	2007
Month Avg Max Temperature		65.7		64.0		62.8		+2.9		69.7		in	1993		54.1		in	1917
Month Avg Min Temperature		46.9		48.3		46.6		+0.3		50.2		in	1930		40.4		in	1967
Month Average Temperature		56.5		56.4		54.7		+1.8		59.9		in	1930		47.8		in	1917
High Heat Index										83		in	2017
Low Wind Chill		34													33		in	1981
Heating Degree Days		19		4		8		+11		21		in	2007		0		in	2021
Month Heating DD		157		157		185		-28		310		in	1917		96		in	1993
Season Heating DD		4636		4939		5358		-722		6439		in	1905		4454		in	2012
Cooling Degree Days		0		0		0		-0		7		in	2017				in
Month Cooling DD		4		3		0		+4		27		in	2001		0		in	2021
Year Cooling DD		9		3		0		+9		27		in	2001		0		in	2021
Maximum Dew Point		40		46		54		-14		67		in	2017		33		in	1981
Minimum Dew Point		20		33		43		-23		57		in	2017		20		in	2023
Average  Dew Point		30		40		48		-18		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		.00		.00		.10		-.10		1.93		in	2002
One Hour Rain		.00		.00						.40		in	1970
Hourly Rain Rate		.00		.00						.82		in	2004
Month Precipitation		.67		1.45		2.01		-1.34		6.51		in	2006		.02		in	2015
Year Precipitation		17.90		17.85		17.74		+.16		33.69		in	1983		10.69		in	1927
Snow		0.0		0.0		0.0		+0.0		0.0		in					in
Snow Depth		0		0						0		in					in
Month Snow		0.0		0.0		0.0		+0.0		1.7		in	1977		0.0		in	2023
Season Snow		9.1		34.7		33.5		-24.4		84.1		in	1996		5.0		in	1998
		May 18, 2023								Record					Record
Observed Daily Data		2023		2022		Norm		Depart		Highest					Lowest
Maximum Humidity		80%		76%		91%		-11%		100%		in	2018		63%		in	1981
Minimum Humidity		29%		26%		56%		-27%		91%		in	2004		25%		in	1983
Average Humidity		55%		51%		73%		-19%		96%		in	2004		45%		in	1981
Maximum Barometer		30.38		29.91		30.08		+00.30		30.50		in	1983		29.48		in	2008
Minimum Barometer		30.10		29.81		29.87		+00.23		30.34		in	2003		29.05		in	1985
Average Barometer		30.24		29.86		29.97		+00.27		30.37		in	2003		29.27		in	1985
Average Wind		8.3		7.0		6.3		+2.0		14.6		in	2000		1.9		in	1995
Direction		SSW		NW		NE				S					SSE
High Wind Gust		23		24		22		+1		41		in	2000		11		in	1995
Direction		SSW		NW		SSE				SW					NW
Maximum Water Temp		56.3		56.8		55.6		+0.7		59.5		in	2017		50.5		in	2020
Minimum Water Temp		53.8		53.2		52.5		+1.3		56.6		in	2013		45.9		in	2020
Average Water Temp		55.1		55.0		54.1		+1.0		57.9		in	2013		48.2		in	2020
Sunrise/ AM Twilight		5:23:10 AM						4:50:13 AM
Sunset / PM Twilight		8:00:24 PM						8:33:15 PM
Length Of Day		14:37:14
Special Conditions		None
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