Portsmouth Rhode Island Weather Almanac
Friday, April 18, 2025
Clear to Mostly Cloudy PM, Slightly Cooler
		Climate Normal Period								Climate Record Period
		1991 - 2020								1893 - 2025
		April 18, 2025								Record					Record
Observed Daily Data		2025		2024		Norm		Depart		Highest					Lowest
Maximum Temperature		60		50		56		+4		80		in	1976		39		in	1921
Minimum Temperature		36		42		40		-4		53		in	2002		29		in	2003
Average Temperature		48		46		48		+0		67		in	1976		36		in	1921
Month Avg Max Temperature		52.7		54.3		53.2		-0.4		61.9		in	1945		45.7		in	2007
Month Avg Min Temperature		37.3		40.5		37.7		-0.4		42.7		in	2010		30.9		in	1943
Month Average Temperature		45.2		47.7		45.7		-0.5		52.4		in	1945		39.3		in	1907
High Heat Index										82		in	1976
Low Wind Chill		35		38		34		+1							19		in	1971
Heating Degree Days		17		19		17		+0		29		in	1921		0		in	1976
Month Heating DD		356		312		347		+9		463		in	1907		227		in	1945
Season Heating DD		4719		4544		4997		-278		6059		in	1918		4121		in	2012
Cooling Degree Days		0		0		0		+0		2		in	1976		0		in	All
Month Cooling DD						0				6		in	2002
Year Cooling DD						0				6		in	2002
Maximum Dew Point		46		41		44		+2		59		in	2002		23		in	1990
Minimum Dew Point		25		36		31		-6		50		in	2002		11		in	1985
Average  Dew Point		36		39		37		-1		55		in	2002		20		in	1990
Month Avg Max Dew Point		44.3		43.8		40.9		+3.4		47.9		in	2023		31.1		in	1975
Month Avg Min Dew Point		30.3		34.7		27.6		+2.7		35.7		in	2010		16.6		in	1992
Month Average Dew Point		37.3		39.3		34.2		+3.1		41.1		in	2010		24.3		in	1992
Precipitation		T		.28		.14		-.14		2.05		in	1967
One Hour Rain		T		.14						.33		in	1967
Half Hour Rain		.00		.11						.11		in	2024
Hourly Rain Rate		.00		.55						.55		in	2024
Month Precipitation		2.44		3.62		2.59		-.15		6.74		in	1983		.08		in	1966
Year Precipitation		11.70		22.46		14.05		-2.35		26.01		in	1983		6.69		in	2012
Snow		0.0		0.0		0.0		+0.0		T		in	1997		0.0		in
Snow Depth		0		0		0.0		+0.0		T		in	2005		0		in
Month Snow		T		0.0		0.5		-0.5		9.6		in	1996		0.0		in	2024
Season Snow		11.9		12.7		33.5		-21.6		84.1		in	1996		5.0		in	1998
		April 18, 2025								Record					Record
Observed Daily Data		2025		2024		Norm		Depart		Highest					Lowest
Maximum Humidity		85%		95%		86%		-1%		100%		in	2001		58%		in	2008
Minimum Humidity		27%		65%		45%		-18%		97%		in	1987		14%		in	2005
Average Humidity		56%		80%		66%		-10%		99%		in	1987		39%		in	1950
Maximum Barometer		30.31		30.20		30.07		+00.24		30.60		in	2014		29.49		in	1997
Minimum Barometer		30.10		30.09		29.81		+00.29		30.50		in	2003		28.99		in	1997
Average Barometer		30.21		30.15		29.94		+00.27		30.54		in	2003		29.24		in	1997
Average Wind		7.3		8.3		7.5		-0.2		20.2		in	1986		3.5		in	1978
Direction		SSW		E		WNW				NNE					SSE
High Wind Gust		29		28		25		+4		47		in	1986		13		in	1953
Direction		SSW		E		NW				NNE					SE
Maximum Water Temp		48.7		51.3		47.6		+1.1		55.4		in	2012		42.3		in	2020
Minimum Water Temp		46.4		46.8		44.8		+1.6		49.8		in	2012		39.9		in	2020
Average Water Temp		47.6		49.1		46.2		+1.3		52.6		in	2012		41.1		in	2020
Sunrise/ AM Twilight		6:51:15 AM						5:29:55 AM
Sunset / PM Twilight		7:29:14 PM						7:58:47 PM
Length Of Day		13:29:47
Special Conditions		None
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