Portsmouth Rhode Island Weather Almanac
Thursday, May 21, 2020
Clear, Light Winds and Cooler
Climate Normal Period						Climate Record Period
1981- 2010						1893 - 2020
		May 21, 2020								Record					Record
Observed Daily Data		Observed		2019		Normal		Depart		Highest					Lowest
Maximum Temperature		62		69		66		-4		85		in	1921		47		in	1929
Minimum Temperature		39		53		49		-10		64		in	1903		38		in	2002
Average Temperature		51		61		58		-7		73		in	1996		45		in	1990
Precipitation		.00		.00		.11		-.11		1.10		in	1986
One Hour		.00		.00						.48		in	1986
Snow		0.0		0.0		0.0		+0.0		0.0		in
Snow Depth		0		0								in
HDD		14		4		7		+7		20		in	1990		0		in	2013
CDD		0		0		0		+0		8		in	1996
Maximum Dew Point		49		60		53		-4		70		in	1996		32		in	1967
Minimum Dew Point		37		37		43		-6		58		in	1986		25		in	1967
Average  Dew Point		43		49		48		-5		63		in	1996		29		in	1967
Maximum Humidity		94%		92%		91%		+3%		100%		in	2013		60%		in	1967
Minimum Humidity		47%		38%		54%		-7%		96%		in	1954		14%		in	1992
Average Humidity		71%		65%		72%		-2%		98%		in	1954		45%		in	1967
Maximum Barometer		30.44		30.02		30.05		+00.39		30.46		in	1987		29.53		in	2008
Minimum Barometer		30.25		29.71		29.84		+00.41		30.26		in	2017		29.12		in	1973
Average Barometer		30.35		29.87		29.95		+00.40		30.35		in	2020		29.40		in	1973
Average Wind		5.9		13.6		6.3		-0.4		16.3		in	1985		2.1		in	1994
Direction		S		NW		SSW				SSW					N
High Wind Gust		21		33		22		-1		37		in	1956		12		in	2016
Direction		SW		NW		SSW				NW					SSW
High Heat Index										84		in	1996
Wind Chill															37		in	2002
Maximum Water Temp		51.0		52.9		56.9		-5.9		60.6		in	2013		51.0		in	2020
Minimum Water Temp		47.3		49.6		53.3		-6.0		57.9		in	1998		47.3		in	2020
Average Water Temp		49.2		51.3		55.2		-6.0		59.1		in	1998		49.2		in	2020
Sunrise/ AM Twilight		5:19:33 AM						4:47:16 AM
Sunset / PM Twilight		8:04:21 PM						8:36:37 PM
Length Of Day		14:44:48
Special Conditions		None
Comments
		May 21, 2020								Record					Record
Month-to-Date Summary		Observed		2019		Normal		Depart		Highest					Lowest
Avg Maximum Temperature		62.5		61.2		63.2		-0.7		69.1		in	1918		56.7		in	1966
Avg Minimum Temperature		43.9		46.5		46.6		-2.7		49.9		in	2018		41.4		in	1956
Average Temperature		53.5		53.9		54.8		-1.3		59.2		in	1930		49.6		in	1966
Total Precipitation		2.15		3.27		2.49		-.34		6.96		in	2006		.09		in	2001
Total Snow		0.0		0.0		T		+0.0		1.7		in	1977		0.0		in
Total HDD		241		230		214		+27		324		in	1966		127		in	1918
Total CDD		0		1		0		+0		27		in	2001		0		in
Avg Maximum Dew Point		47.6		52.2		50.3		-2.7		57.2		in	2004		42.0		in	1967
Avg Minimum Dew Point		34.2		41.8		38.2		-4.0		46.7		in	1953		30.0		in	1967
Average  Dew Point		41.1		47.0		44.3		-3.1		50.7		in	1953		36.0		in	1967
		May 21, 2020								Record					Record
Year-to-Date Summary		Observed		2019		Normal		Depart		Highest					Lowest
Total Precipitation		18.35		20.93		19.53		-1.18		34.08		in	1983		10.81		in	1927
Total Snow (since Jul 1 19)		12.9		21.1		31.8		-18.9		84.1		in	1996		5.0		in	1998
Total HDD (since Jul 1 19)		5062		5440		5548		-486		6467		in	1905		4465		in	2012
Total CDD (since Jan 1)		0		1		0		+0.0		27		in	2001		0		in	2020
Hour-by-Hour Weather For May 21, 2020
Climate Weather for May 21
Weather History For May 21
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