Portsmouth Rhode Island Weather Almanac
Monday, May 15, 2023
Clear to Partly Cloudy PM, Warmer
		Climate Normal Period								Climate Record Period
		1991 - 2020								1893 - 2023
		May 15, 2023								Record					Record
Observed Daily Data		2023		2022		Norm		Depart		Highest					Lowest
Maximum Temperature		71		71		65		+6		84		in	1900		50		in	1916
Minimum Temperature		47		54		48		-1		57		in	2012		38		in	1986
Average Temperature		59		63		56		+3		68		in	1976		46		in	1947
Month Avg Max Temperature		66.4		62.9		62.3		+4.1		71.3		in	2001		52.4		in	1917
Month Avg Min Temperature		47.6		47.4		46.2		+1.4		50.4		in	1930		39.8		in	1967
Month Average Temperature		57.2		55.5		54.3		+2.9		60.5		in	1930		46.3		in	1917
High Heat Index										83		in	1900
Low Wind Chill															37		in	1985
Heating Degree Days		6		2		9		-3		19		in	1947		0		in	1976
Month HDD		121		146		161		-40		280		in	1917		79		in	1930
Season HDD		4600		4928		5334		-734		6395		in	1905		4437		in	2012
Cooling Degree Days		0		0		0		-0		3		in	1976				in
Month CDD		4		3		0		+4		27		in	2001		0		in	2021
Year CDD		9		3		0		+9		27		in	2001		0		in	2021
Maximum Dew Point		50		64		53		-3		64		in	2022		35		in	2002
Minimum Dew Point		34		53		42		-8		55		in	2014		24		in	1971
Average  Dew Point		42		59		47		-5		59		in	2022		31		in	1971
Month Avg Max Dew Point		51.3		50.7		50.5		+0.9		55.7		in	2004		40.3		in	1966
Month Avg Min Dew Point		39.1		39.5		38.9		+0.1		45.7		in	1998		27.5		in	1966
Month Average Dew Point		45.5		45.4		44.7		+0.9		49.9		in	1998		33.9		in	1966
Precipitation		.00		.05		.10		-.10		1.53		in	1938
One Hour		.00		.04						.56		in	1978
Hourly Rate		.00		.09						4.76		in	2010
Month Precipitation		.67		1.05		1.71		-1.04		6.16		in	2006		.01		in	2015
Year Precipitation		17.90		17.45		17.44		+.46		32.13		in	1983		10.56		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 15, 2023								Record					Record
Observed Daily Data		2023		2022		Norm		Depart		Highest					Lowest
Maximum Humidity		86%		98%		90%		-4%		100%		in	2018		59%		in	2000
Minimum Humidity		31%		78%		53%		-22%		94%		in	1953		25%		in	1994
Average Humidity		59%		88%		72%		-13%		96%		in	1953		46%		in	2000
Maximum Barometer		30.21		29.98		30.09		+00.12		30.53		in	1971		29.61		in	1960
Minimum Barometer		29.89		29.81		29.85		+00.05		30.32		in	1999		29.40		in	2017
Average Barometer		30.05		29.90		29.97		+00.08		30.38		in	1999		29.58		in	1960
Average Wind		7.9		6.0		6.4		+1.5		14.3		in	2002		2.2		in	1962
Direction		SSW		S		S				WNW					SSE
High Wind Gust		26		26		22		+4		40		in	2002		9		in	1998
Direction		SW		SSW		SSE				WNW					SSE
Maximum Water Temp		59.7		55.8		54.9		+4.8		59.9		in	2007		49.5		in	2019
Minimum Water Temp		55.2		52.9		51.7		+3.5		56.6		in	2012		45.1		in	2020
Average Water Temp		57.5		54.4		53.3		+4.1		58.0		in	2007		47.5		in	2020
Sunrise/ AM Twilight		5:25:59 AM						4:53:14 AM
Sunset / PM Twilight		7:57:26 PM						8:30:01 PM
Length Of Day		14:31:27
Special Conditions		None
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