Portsmouth Rhode Island Weather Almanac
Tuesday, May 4, 2021
Cloudy, Heavy Morning Rain and Fog, Cooler
Climate Normal Period						Climate Record Period
1991- 2020						1893 - 2021
		May 4, 2021								Record					Record
Observed Daily Data		2021		2020		Norm		Depart		Highest					Lowest
Maximum Temperature		52		73		61		-9		87		in	2001		50		in	1987
Minimum Temperature		48		50		45		+3		58		in	2001		33		in	1964
Average Temperature		50		62		53		-3		73		in	2001		42		in	1911
Month Avg Max Temperature		64.8		68.0		60.5		+4.3		83.8		in	2001		51.3		in	1920
Month Avg Min Temperature		46.8		50.0		44.8		+2.0		54.5		in	2001		34.8		in	1964
Month Average Temperature		56.0		59.3		52.8		+3.3		69.5		in	2001		45.5		in	1917
HDD		15		3		12		+3		23		in	1911		0		in	2010
Month HDD		36		23		49		-13		78		in	1917		1		in	2001
Season HDD		4845		4844		5222		-377		6309		in	1904		4348		in	2012
CDD		0		0		0		+0		8		in	2001		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		52		52		49		+3		62		in	2018		23		in	1986
Minimum Dew Point		46		35		37		+9		50		in	2018		15		in	1986
Average  Dew Point		49		44		43		+6		56		in	2018		19		in	1986
Month Avg Max Dew Point		50.8		54.5		48.8		+2.0		58.3		in	2010		28.3		in	1952
Month Avg Min Dew Point		36.8		40.5		36.8		+0.0		47.5		in	2010		16.8		in	1974
Month Average Dew Point		43.8		47.8		42.8		+1.0		52.9		in	2010		25.3		in	1957
Precipitation		.94		.05		.12		+.82		2.41		in	1893
One Hour		.39		.04						.42		in	1987
Hourly Rate		2.22		.08						2.22		in	2021
Month Precipitation		1.21		.95		.49		+.72		2.92		in	1900		.00		in	2015
Year Precipitation		12.91		17.15		16.22		-3.31		31.53		in	1983		9.77		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		T		in	1995		0.0		in	2021
Season Snow		27.7		12.9		33.5		-5.8		84.1		in	1996		5.0		in	1998
		May 4, 2021								Record					Record
Observed Daily Data		2021		2020		Norm		Depart		Highest					Lowest
Maximum Humidity		98%		86%		87%		+11%		100%		in	2015		54%		in	1967
Minimum Humidity		83%		27%		49%		+34%		92%		in	2012		16%		in	1980
Average Humidity		91%		57%		68%		+23%		96%		in	2012		40%		in	1952
Maximum Barometer		29.85		29.76		30.04		-00.19		30.55		in	1990		29.61		in	1983
Minimum Barometer		29.69		29.58		29.82		-00.13		30.29		in	1993		29.12		in	1984
Average Barometer		29.77		29.67		29.93		-00.16		30.36		in	1993		29.39		in	1984
Average Wind		6.8		9.8		7.0		-0.2		15.2		in	1981		2.4		in	2009
Direction		NNE		NW		SSW				NNE					SSE
High Wind Gust		28		30		24		+4		46		in	2014		13		in	2012
Direction		NNE		NNW		SSE				W					S
High Heat Index										86		in	2001
Wind Chill															26		in	1986
Maximum Water Temp		50.9		46.4		51.7		-0.8		58.6		in	2007		46.4		in	2020
Minimum Water Temp		48.7		42.6		48.5		+0.2		52.3		in	1998		42.6		in	2020
Average Water Temp		49.8		44.5		50.1		-0.3		54.7		in	2007		44.5		in	2020
Sunrise/ AM Twilight		5:36:51 AM						5:06:21 AM
Sunset / PM Twilight		7:47:02 PM						8:17:31 PM
Length Of Day		14:10:11
Special Conditions		Fog
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