Portsmouth Rhode Island Weather Almanac
Sunday, May 21, 2023
Cloudy, Heavy Rain and Fog early, Partly Cloudy Day to Clear PM, Warmer
		Climate Normal Period								Climate Record Period
		1991 - 2020								1893 - 2023
		May 21, 2023								Record					Record
Observed Daily Data		2023		2022		Norm		Depart		Highest					Lowest
Maximum Temperature		73		84		67		+6		85		in	1921		47		in	1929
Minimum Temperature		56		58		50		+6		64		in	1903		38		in	2002
Average Temperature		65		71		58		+7		73		in	1996		45		in	1990
Month Avg Max Temperature		65.7		64.8		63.3		+2.4		69.1		in	1918		56.7		in	1966
Month Avg Min Temperature		47.7		49.0		47.0		+0.6		49.9		in	2018		41.4		in	1956
Month Average Temperature		56.9		57.1		55.2		+1.7		59.2		in	1930		49.6		in	1966
High Heat Index				92						92		in	2022
Low Wind Chill															35		in	2002
Heating Degree Days		0		0		7		-7		20		in	1990		0		in	2023
Month Heating DD		174		174		206		-32		324		in	1966		127		in	1918
Season Heating DD		4653		4956		5379		-726		6467		in	1905		4465		in	2012
Cooling Degree Days		0		6		0		-0		8		in	1996				in
Month Cooling DD		4		9		1		+3		27		in	2001		0		in	2020
Year Cooling DD		9		9		1		+8		27		in	2001		0		in	2020
Maximum Dew Point		61		75		55		+6		75		in	2022		32		in	1967
Minimum Dew Point		52		58		44		+8		58		in	2022		25		in	1967
Average  Dew Point		57		67		50		+7		67		in	2022		29		in	1967
Month Avg Max Dew Point		52.1		52.9		51.5		+0.6		57.2		in	2004		42.0		in	1967
Month Avg Min Dew Point		38.7		41.5		40.1		-1.4		46.7		in	1953		30.0		in	1967
Month Average Dew Point		45.7		47.5		45.8		-0.1		50.7		in	1953		36.0		in	1967
Precipitation		1.05		.41		.10		+.95		1.10		in	1986
One Hour Rain		.46		.40						.48		in	1986
Hourly Rain Rate		1.42		1.81						1.81		in	2022
Month Precipitation		3.43		2.17		2.31		+1.12		6.96		in	2006		.09		in	2001
Year Precipitation		20.66		18.57		18.04		+2.62		34.08		in	1983		10.81		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 21, 2023								Record					Record
Observed Daily Data		2023		2022		Norm		Depart		Highest					Lowest
Maximum Humidity		99%		99%		91%		+8%		100%		in	2013		60%		in	1967
Minimum Humidity		51%		73%		54%		-3%		96%		in	1954		14%		in	1992
Average Humidity		75%		86%		72%		+3%		98%		in	1954		45%		in	1967
Maximum Barometer		30.00		30.05		30.07		-00.07		30.53		in	2021		29.53		in	2008
Minimum Barometer		29.78		29.96		29.85		-00.07		30.36		in	2021		29.12		in	1973
Average Barometer		29.89		30.01		29.96		-00.07		30.45		in	2021		29.40		in	1973
Average Wind		6.6		5.5		6.3		+0.3		16.3		in	1985		2.1		in	1994
Direction		WNW		SSW		SSW				SSW					N
High Wind Gust		30		17		22		+8		37		in	1956		12		in	2016
Direction		S		SSW		SW				NW					SSW
Maximum Water Temp		57.2		58.1		56.9		+0.3		60.6		in	2013		51.0		in	2020
Minimum Water Temp		55.0		54.9		53.4		+1.6		57.9		in	1998		47.3		in	2020
Average Water Temp		56.1		56.5		55.2		+0.9		59.1		in	1998		49.2		in	2020
Sunrise/ AM Twilight		5:20:35 AM						4:47:29 AM
Sunset / PM Twilight		8:03:16 PM						8:36:23 PM
Length Of Day		14:42:41
Special Conditions		Fog
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