Portsmouth Rhode Island Weather Almanac
Monday, May 20, 2024
Cloudy early, Mostly Cloudy Day to Partly Cloudy, Light Fog Late, Much Warmer
		Climate Normal Period								Climate Record Period
		1991 - 2020								1893 - 2024
		May 20, 2024								Record					Record
Observed Daily Data		2024		2023		Norm		Depart		Highest					Lowest
Maximum Temperature		70		62		66		+4		85		in	1996		51		in	1948
Minimum Temperature		50		55		50		+0		60		in	1903		38		in	1992
Average Temperature		60		59		58		+2		72		in	1903		47		in	1948
Month Avg Max Temperature		62.0		65.4		63.2		-1.2		69.0		in	1918		56.0		in	1966
Month Avg Min Temperature		47.9		47.3		46.9		+1.0		49.9		in	1930		41.3		in	1967
Month Average Temperature		55.2		56.5		55.1		+0.1		59.3		in	1930		49.1		in	1966
High Heat Index										88		in	1996
Low Wind Chill															37		in	1992
Heating Degree Days		5		6		7		-2		18		in	1948		0		in	2019
Month Heating DD		197		174		199		-2		318		in	1966		125		in	1993
Season Heating DD		4928		4653		5403		-475		6456		in	1905		4460		in	2012
Cooling Degree Days		0		0		0		+0		7		in	1903		0		in	2023
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		62		61		55		+7		70		in	1996		38		in	2002
Minimum Dew Point		48		53		44		+4		57		in	2019		29		in	2002
Average  Dew Point		55		57		49		+6		61		in	2019		34		in	2002
Month Avg Max Dew Point		54.2		51.7		51.4		+2.9		56.9		in	2004		42.5		in	1967
Month Avg Min Dew Point		44.3		38.0		39.9		+4.4		46.7		in	1953		30.3		in	1967
Month Average Dew Point		49.5		45.2		45.6		+3.9		50.7		in	1953		36.4		in	1967
Precipitation		.00		1.71		.10		-.10		1.71		in	2023
One Hour Rain		.00		.36						.43		in	1984
Half Hour Rain		.00		.18						.24		in	2018
Hourly Rain Rate		.00		2.01						2.74		in	2018
Month Precipitation		5.04		2.38		2.21		+2.83		6.87		in	2006		.09		in	2001
Year Precipitation		27.96		19.61		18.07		+9.89		34.03		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 20, 2024								Record					Record
Observed Daily Data		2024		2023		Norm		Depart		Highest					Lowest
Maximum Humidity		98%		99%		93%		+5%		100%		in	2019		68%		in	1981
Minimum Humidity		72%		86%		56%		+16%		90%		in	1972		24%		in	1981
Average Humidity		85%		93%		75%		+10%		95%		in	1969		46%		in	1981
Maximum Barometer		30.07		30.28		30.07		+00.00		30.58		in	1992		29.65		in	2008
Minimum Barometer		30.01		29.84		29.85		+00.16		30.39		in	2020		29.32		in	1968
Average Barometer		30.04		30.06		29.96		+00.08		30.45		in	2021		29.51		in	1968
Average Wind		7.1		11.2		6.6		+0.5		14.3		in	1985		1.2		in	1996
Direction		S		SSE		S				SSW					SSW
High Wind Gust		19		31		22		-3		51		in	1963		12		in	1951
Direction		NNE		SSE		SSW				SSW					SE
Maximum Water Temp		56.7		56.8		56.5		+0.2		61.9		in	2012		49.5		in	2020
Minimum Water Temp		54.3		55.4		53.1		+1.2		57.7		in	2012		46.2		in	2020
Average Water Temp		55.5		56.1		54.8		+0.7		59.8		in	2012		47.9		in	2020
Sunrise/ AM Twilight		5:20:47 AM						4:48:22 AM
Sunset / PM Twilight		8:03:02 PM						8:35:21 PM
Length Of Day		14:42:15
Special Conditions		Fog
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