Portsmouth Rhode Island Weather Almanac
Monday, May 10, 2021
Cloudy, Heavy Rain & Fog early, Partly Cloudy PM, Light Winds & Continued Cool
Climate Normal Period						Climate Record Period
1991- 2020						1893 - 2021
		May 10, 2021								Record					Record
Observed Daily Data		2021		2020		Norm		Depart		Highest					Lowest
Maximum Temperature		58		59		63		-5		89		in	1896		45		in	1924
Minimum Temperature		45		35		47		-2		59		in	1979		34		in	1977
Average Temperature		52		47		55		-3		71		in	1979		42		in	1977
Month Avg Max Temperature		61.4		61.6		61.5		-0.1		73.3		in	1930		50.8		in	1917
Month Avg Min Temperature		45.6		43.6		45.5		+0.1		52.0		in	1930		38.7		in	1917
Month Average Temperature		53.8		52.8		53.6		+0.2		62.9		in	1930		45.0		in	1917
HDD		13		18		10		+3		23		in	1977		0		in	1979
Month HDD		112		122		114		-2		200		in	1917		33		in	1930
Season HDD		4921		4943		5287		-366		6351		in	1905		4408		in	2012
CDD		0		0		0		+0		6		in	1979		0		in
Month CDD		0		0		0		+0		19		in	2001		0		in	2021
Year CDD		0		0		0		+0		19		in	2001		0		in	2021
Maximum Dew Point		50		43		51		-1		63		in	2015		26		in	1962
Minimum Dew Point		44		26		40		+4		55		in	2015		12		in	1962
Average  Dew Point		47		35		45		+2		59		in	2015		19		in	1962
Month Avg Max Dew Point		49.2		46.8		49.6		-0.4		56.9		in	1998		36.5		in	1952
Month Avg Min Dew Point		38.4		31.8		38.0		+0.4		49.0		in	1998		25.3		in	1968
Month Average Dew Point		43.9		39.5		43.8		+0.1		53.0		in	1998		32.1		in	1968
Precipitation		.97		.00		.11		+.86		.97		in	2021
One Hour		.24		.00						.32		in	1990
Hourly Rate		1.23		.00						1.23		in	2021
Month Precipitation		2.36		1.46		1.17		+1.19		4.26		in	1972		.00		in	2015
Year Precipitation		14.06		17.66		16.90		-2.84		31.60		in	1983		10.05		in	1927
Snow		0.0		0.0		0.0		+0.0		T		in	1977
Snow Depth		0		0						2		in	1977
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 10, 2021								Record					Record
Observed Daily Data		2021		2020		Norm		Depart		Highest					Lowest
Maximum Humidity		97%		82%		88%		+9%		100%		in	2015		43%		in	1962
Minimum Humidity		62%		36%		52%		+10%		95%		in	1998		14%		in	1962
Average Humidity		80%		59%		70%		+10%		98%		in	1998		29%		in	1962
Maximum Barometer		29.95		30.02		30.02		-00.07		30.37		in	1996		29.59		in	1964
Minimum Barometer		29.75		29.93		29.78		-00.03		30.14		in	1993		29.20		in	1945
Average Barometer		29.85		29.98		29.90		-00.05		30.22		in	1993		29.50		in	1969
Average Wind		4.3		10.6		8.0		-3.7		15.6		in	1956		2.3		in	1994
Direction		NNE		W		SSW				SSW					SW
High Wind Gust		15		29		26		-11		44		in	1964		13		in	1953
Direction		NNE		SSW		SW				WNW					SW
High Heat Index										82		in	1979
Wind Chill				27											27		in	2020
Maximum Water Temp		52.3		44.2		53.3		-1.0		60.3		in	2007		44.2		in	2020
Minimum Water Temp		49.8		42.1		49.9		-0.1		54.1		in	2013		42.1		in	2020
Average Water Temp		51.1		43.2		51.6		-0.5		57.1		in	2007		43.2		in	2020
Sunrise/ AM Twilight		5:29:56 AM						4:58:49 AM
Sunset / PM Twilight		7:53:19 PM						8:24:26 PM
Length Of Day		14:23:23
Special Conditions		None	Fog
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