Portsmouth Rhode Island Weather Almanac
Tuesday, May 21, 2024
Dense Fog early, Partly Cloudy Day to Clear PM, Seasonal Temperatures
		Climate Normal Period								Climate Record Period
		1991 - 2020								1893 - 2024
		May 21, 2024								Record					Record
Observed Daily Data		2024		2023		Norm		Depart		Highest					Lowest
Maximum Temperature		65		73		67		-2		85		in	1921		47		in	1929
Minimum Temperature		50		56		50		+0		64		in	1903		38		in	2002
Average Temperature		58		65		58		+0		73		in	1996		45		in	1990
Month Avg Max Temperature		62.1		65.7		63.3		-1.2		69.1		in	1918		56.7		in	1966
Month Avg Min Temperature		48.0		47.7		47.0		+0.9		49.9		in	2018		41.4		in	1956
Month Average Temperature		55.3		56.9		55.2		+0.1		59.2		in	1930		49.6		in	1966
High Heat Index										92		in	2022
Low Wind Chill															35		in	2002
Heating Degree Days		7		0		7		+0		20		in	1990		0		in	2023
Month Heating DD		204		174		206		-2		324		in	1966		127		in	1918
Season Heating DD		4935		4653		5410		-475		6467		in	1905		4465		in	2012
Cooling Degree Days		0		0		1		-1		8		in	1996		0		in	2024
Month Cooling DD		0		4		1		-1		27		in	2001		0		in	2024
Year Cooling DD		0		4		1		-1		27		in	2001		0		in	2024
Maximum Dew Point		58		61		55		+3		75		in	2022		32		in	1967
Minimum Dew Point		49		52		44		+5		58		in	2022		25		in	1967
Average  Dew Point		54		57		50		+4		67		in	2022		29		in	1967
Month Avg Max Dew Point		54.4		52.1		51.5		+2.9		57.2		in	2004		42.0		in	1967
Month Avg Min Dew Point		44.5		38.7		40.1		+4.4		46.7		in	1953		30.0		in	1967
Month Average Dew Point		49.7		45.7		45.8		+3.9		50.7		in	1953		36.0		in	1967
Precipitation		.00		1.05		.10		-.10		1.10		in	1986
One Hour Rain		.00		.46						.48		in	1986
Half Hour Rain		.00		.24						.24		in	2023
Hourly Rain Rate		.00		1.42						1.81		in	2022
Month Precipitation		5.04		3.43		2.31		+2.73		6.96		in	2006		.09		in	2001
Year Precipitation		27.96		20.66		18.17		+9.79		34.08		in	1983		10.81		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 21, 2024								Record					Record
Observed Daily Data		2024		2023		Norm		Depart		Highest					Lowest
Maximum Humidity		99%		99%		91%		+8%		100%		in	2013		60%		in	1967
Minimum Humidity		77%		51%		54%		+23%		96%		in	1954		14%		in	1992
Average Humidity		88%		75%		72%		+16%		98%		in	1954		45%		in	1967
Maximum Barometer		30.04		30.00		30.07		-00.03		30.53		in	2021		29.53		in	2008
Minimum Barometer		29.95		29.78		29.85		+00.10		30.36		in	2021		29.12		in	1973
Average Barometer		30.00		29.89		29.96		+00.04		30.45		in	2021		29.40		in	1973
Average Wind		7.5		6.6		6.3		+1.2		16.3		in	1985		2.1		in	1994
Direction		SSW		WNW		SSW				SSW					N
High Wind Gust		23		30		22		+1		37		in	1956		12		in	2016
Direction		SSW		S		SW				NW					SSW
Maximum Water Temp		57.9		57.2		56.9		+1.0		60.6		in	2013		51.0		in	2020
Minimum Water Temp		55.6		55.0		53.5		+2.1		57.9		in	1998		47.3		in	2020
Average Water Temp		56.8		56.1		55.2		+1.5		59.1		in	1998		49.2		in	2020
Sunrise/ AM Twilight		5:19:59 AM						4:47:29 AM
Sunset / PM Twilight		8:03:58 PM						8:36:23 PM
Length Of Day		14:43:59
Special Conditions		Dense Fog
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