Portsmouth Rhode Island Weather Almanac
Thursday, May 20, 2021
Clear to Partly Cloudy PM, Light Winds and Cooler
Climate Normal Period						Climate Record Period
1991- 2020						1893 - 2021
		May 20, 2021								Record					Record
Observed Daily Data		2021		2020		Norm		Depart		Highest					Lowest
Maximum Temperature		71		65		66		+5		85		in	1996		51		in	1948
Minimum Temperature		49		42		50		-1		60		in	1903		38		in	1992
Average Temperature		60		54		58		+2		72		in	1903		47		in	1948
Month Avg Max Temperature		66.8		62.6		63.2		+3.6		69.0		in	1918		56.0		in	1966
Month Avg Min Temperature		47.1		44.2		46.9		+0.2		49.9		in	1930		41.3		in	1967
Month Average Temperature		57.2		53.7		55.1		+2.2		59.3		in	1930		49.1		in	1966
HDD		5		11		7		-2		18		in	1948		0		in	2019
Month HDD		157		227		199		-42		318		in	1966		125		in	1993
Season HDD		4966		5048		5372		-406		6456		in	1905		4460		in	2012
CDD		0		0		0		+0		7		in	1903		0		in
Month CDD		1		0		0		+1		27		in	2001		0		in	2020
Year CDD		1		0		0		+1		27		in	2001		0		in	2020
Maximum Dew Point		55		44		55		+0		70		in	1996		38		in	2002
Minimum Dew Point		42		34		44		-2		57		in	2019		29		in	2002
Average  Dew Point		49		39		49		+0		61		in	2019		34		in	2002
Month Avg Max Dew Point		49.5		47.6		51.4		-1.9		56.9		in	2004		42.5		in	1967
Month Avg Min Dew Point		38.5		34.1		39.9		-1.5		46.7		in	1953		30.3		in	1967
Month Average Dew Point		44.2		41.1		45.6		-1.5		50.7		in	1953		36.4		in	1967
Precipitation		.00		.00		.10		-.10		1.15		in	1952
One Hour		.00		.00						.43		in	1984
Hourly Rate		.00		.00						2.74		in	2018
Month Precipitation		2.38		2.15		2.21		+.17		6.87		in	2006		.09		in	2001
Year Precipitation		14.08		18.35		17.94		-3.86		34.03		in	1983		10.81		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 20, 2021								Record					Record
Observed Daily Data		2021		2020		Norm		Depart		Highest					Lowest
Maximum Humidity		92%		86%		93%		-1%		100%		in	2019		68%		in	1981
Minimum Humidity		39%		32%		55%		-16%		90%		in	1972		24%		in	1981
Average Humidity		66%		59%		74%		-9%		95%		in	1969		46%		in	1981
Maximum Barometer		30.52		30.48		30.07		+00.45		30.58		in	1992		29.65		in	2008
Minimum Barometer		30.37		30.39		29.85		+00.52		30.39		in	2020		29.32		in	1968
Average Barometer		30.45		30.44		29.96		+00.49		30.45		in	2021		29.51		in	1968
Average Wind		3.7		7.8		6.6		-2.9		14.3		in	1985		1.2		in	1996
Direction		S		NE		S				SSW					SSW
High Wind Gust		18		21		22		-4		51		in	1963		12		in	1951
Direction		SSE		E		SSW				SSW					SE
High Heat Index										88		in	1996
Wind Chill															36		in	1991
Maximum Water Temp		60.3		49.5		56.4		+3.9		61.9		in	2012		49.5		in	2020
Minimum Water Temp		56.5		46.2		53.0		+3.5		57.7		in	2012		46.2		in	2020
Average Water Temp		58.4		47.9		54.7		+3.7		59.8		in	2012		47.9		in	2020
Sunrise/ AM Twilight		5:20:31 AM						4:48:22 AM
Sunset / PM Twilight		8:03:12 PM						8:35:21 PM
Length Of Day		14:42:41
Special Conditions		None
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