Portsmouth Rhode Island Weather Almanac
Tuesday, April 15, 2025
Cloudy, Light Rain early then Mostly Cloudy, Light Rain PM, Cooler
		Climate Normal Period								Climate Record Period
		1991 - 2020								1893 - 2025
		April 15, 2025								Record					Record
Observed Daily Data		2025		2024		Norm		Depart		Highest					Lowest
Maximum Temperature		56		70		55		+1		75		in	1941		40		in	2018
Minimum Temperature		46		46		39		+7		50		in	2023		28		in	1957
Average Temperature		51		58		47		+4		61		in	1941		35		in	1943
Month Avg Max Temperature		51.8		53.7		52.7		-0.9		62.9		in	1945		44.9		in	2003
Month Avg Min Temperature		37.1		39.9		37.3		-0.3		43.4		in	2010		29.5		in	1982
Month Average Temperature		44.7		47.1		45.3		-0.6		53.2		in	2010		38.7		in	1907
High Heat Index												in
Low Wind Chill		42		45		33		+9							17		in	1957
Heating Degree Days		14		7		18		-4		30		in	1943		4		in	1941
Month Heating DD		305		269		296		+9		394		in	1907		177		in	2010
Season Heating DD		4668		4501		4946		-278		6014		in	1918		4106		in	2012
Cooling Degree Days		0		0		0		+0		0		in			0		in	All
Month Cooling DD
Year Cooling DD
Maximum Dew Point		53		56		43		+10		60		in	2023		16		in	1971
Minimum Dew Point		40		41		29		+11		48		in	2023		4		in	2005
Average  Dew Point		47		49		36		+11		54		in	2023		13		in	1971
Month Avg Max Dew Point		44.0		43.7		40.5		+3.5		47.7		in	2010		30.3		in	1965
Month Avg Min Dew Point		30.3		34.6		27.0		+3.3		35.7		in	2010		14.0		in	1982
Month Average Dew Point		37.1		39.2		33.7		+3.4		41.7		in	2010		22.4		in	1982
Precipitation		.20		.08		.14		+.06		3.29		in	1964
One Hour Rain		.11		.08						.49		in	1964
Half Hour Rain		.06		.08						.29		in	2014
Hourly Rain Rate		.25		2.21						5.54		in	2014
Month Precipitation		2.44		3.34		2.17		+.27		6.74		in	1964		.03		in	1963
Year Precipitation		11.70		22.18		13.63		-1.93		24.99		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		3		in	1950		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 15, 2025								Record					Record
Observed Daily Data		2025		2024		Norm		Depart		Highest					Lowest
Maximum Humidity		98%		90%		85%		+13%		100%		in	2019		47%		in	1976
Minimum Humidity		69%		54%		46%		+23%		95%		in	1984		14%		in	1959
Average Humidity		84%		72%		66%		+18%		98%		in	1984		35%		in	1976
Maximum Barometer		29.70		29.96		30.08		-00.38		30.55		in	2005		29.62		in	2019
Minimum Barometer		29.32		29.69		29.81		-00.49		30.34		in	2016		29.18		in	1980
Average Barometer		29.51		29.83		29.94		-00.43		30.43		in	2005		29.43		in	1974
Average Wind		6.9		5.7		7.7		-0.8		15.3		in	1981		2.9		in	1994
Direction		SSW		SSW		SSE				NW					SSE
High Wind Gust		30		29		26		+4		53		in	2007		13		in	2023
Direction		NW		SW		S				ESE					S
Maximum Water Temp		46.2		50.0		47.2		-1.0		52.6		in	2012		43.2		in	2020
Minimum Water Temp		45.5		46.6		44.3		+1.2		49.8		in	2012		40.3		in	2018
Average Water Temp		45.9		48.3		45.8		+0.1		51.2		in	2012		41.8		in	2018
Sunrise/ AM Twilight		6:56:19 AM						5:34:45 AM
Sunset / PM Twilight		7:25:58 PM						7:55:18 PM
Length Of Day		13:21:53
Special Conditions		Fog
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