Portsmouth Rhode Island Weather Almanac
Monday, May 17, 2021
Clear to Partly Cloudy, Light Winds, Continued Warm
Climate Normal Period						Climate Record Period
1991- 2020						1893 - 2021
		May 17, 2021								Record					Record
Observed Daily Data		2021		2020		Norm		Depart		Highest					Lowest
Maximum Temperature		74		60		65		+9		81		in	2015		49		in	1994
Minimum Temperature		50		48		49		+1		57		in	2017		35		in	1956
Average Temperature		62		54		57		+5		68		in	1977		46		in	1956
Month Avg Max Temperature		65.2		62.1		62.6		+2.6		69.9		in	1993		53.4		in	1917
Month Avg Min Temperature		46.3		43.7		46.5		-0.2		50.3		in	1930		40.2		in	1967
Month Average Temperature		56.1		53.2		54.6		+1.5		60.4		in	1930		47.2		in	1917
HDD		3		11		8		-5		19		in	1956		0		in	2017
Month HDD		152		201		177		-25		303		in	1917		89		in	1993
Season HDD		4961		5022		5350		-389		6426		in	1905		4445		in	2012
CDD		0		0		0		+0		3		in	1977		0		in
Month CDD		0		0		0		+0		27		in	2001		0		in	2021
Year CDD		0		0		0		+0		27		in	2001		0		in	2021
Maximum Dew Point		52		48		54		-2		65		in	2015		36		in	1967
Minimum Dew Point		44		44		42		+2		53		in	1988		23		in	1956
Average  Dew Point		48		46		48		+0		58		in	2015		31		in	1967
Month Avg Max Dew Point		48.5		47.5		50.8		-2.3		56.1		in	2004		40.5		in	1966
Month Avg Min Dew Point		37.5		33.4		39.3		-1.8		45.9		in	1953		28.2		in	1966
Month Average Dew Point		43.2		40.6		45.1		-1.9		50.3		in	2018		34.4		in	1966
Precipitation		.00		.00		.10		-.10		1.65		in	1916
One Hour		.00		.00						.41		in	1976
Hourly Rate		.00		.00						3.53		in	2014
Month Precipitation		2.38		2.15		1.91		+.47		6.51		in	2006		.02		in	2015
Year Precipitation		14.08		18.35		17.64		-3.56		33.69		in	1983		10.59		in	1927
Snow		0.0		0.0		0.0		+0.0		0.0		in
Snow Depth		0		0								in
Month Snow		0.0		0.0		0.0		+0.0		1.7		in	1977		0.0		in
Season Snow		27.7		12.9		33.5		-5.8		84.1		in	1996		5.0		in	1998
		May 17, 2021								Record					Record
Observed Daily Data		2021		2020		Norm		Depart		Highest					Lowest
Maximum Humidity		83%		91%		90%		-7%		100%		in	2018		54%		in	1977
Minimum Humidity		36%		60%		53%		-17%		94%		in	1990		22%		in	1993
Average Humidity		60%		76%		71%		-12%		97%		in	1990		44%		in	1977
Maximum Barometer		30.28		30.34		30.06		+00.22		30.50		in	2004		29.49		in	2008
Minimum Barometer		30.21		30.24		29.84		+00.37		30.38		in	2003		29.09		in	1985
Average Barometer		30.25		30.29		29.95		+00.30		30.44		in	2004		29.43		in	2008
Average Wind		4.2		6.9		6.8		-2.6		12.7		in	1967		2.3		in	2018
Direction		S		S		SE				WSW					NE
High Wind Gust		24		18		23		+1		39		in	1954		9		in	2018
Direction		SW		S		SE				W					SSE
High Heat Index										82		in	2015
Wind Chill															32		in	1956
Maximum Water Temp		57.9		50.9		55.5		+2.4		58.5		in	2012		50.9		in	2020
Minimum Water Temp		53.6		46.4		52.0		+1.6		54.9		in	1998		46.4		in	2020
Average Water Temp		55.8		48.7		53.8		+2.0		56.7		in	2012		48.7		in	2020
Sunrise/ AM Twilight		5:23:03 AM						4:51:12 AM
Sunset / PM Twilight		8:00:20 PM						8:32:11 PM
Length Of Day		14:37:17
Special Conditions		None
Comments
Hour-by-Hour Weather For May 17, 2021
Climate Weather for May 17
Weather History For May 17
Weather Calendar
Back To Weather Stat Page
Home