Portsmouth Rhode Island Weather Almanac
Wednesday, April 30, 2025
Partly Cloudy early, Clear Day to Partly Cloudy PM, Much Warmer
		Climate Normal Period								Climate Record Period
		1991 - 2020								1893 - 2025
		April 30, 2025								Record					Record
Observed Daily Data		2025		2024		Norm		Depart		Highest					Lowest
Maximum Temperature		73		59		60		+13		83		in	1942		42		in	1909
Minimum Temperature		54		48		44		+10		55		in	1974		29		in	1992
Average Temperature		64		54		52		+12		64		in	1951		37		in	1975
Month Avg Max Temperature		57.6		55.9		55.2		+2.4		61.1		in	1976		48.8		in	1907
Month Avg Min Temperature		41.8		40.4		39.4		+2.4		43.2		in	2023		34.1		in	1943
Month Average Temperature		49.9		48.4		47.6		+2.4		51.9		in	2010		42.3		in	1907
High Heat Index										82		in	1942
Low Wind Chill		48		46		38		+10							21		in	1992
Heating Degree Days		1		11		13		-12		27		in	1909		0		in	1974
Month Heating DD		452		499		523		-71		682		in	1907		392		in	2010
Season Heating DD		4815		4731		5173		-358		6252		in	1904		4289		in	2012
Cooling Degree Days		0		0		0		+0		1		in	1942		0		in	All
Month Cooling DD						0				13		in	1976
Year Cooling DD						0				13		in	1976
Maximum Dew Point		56		50		48		+8		58		in	2023		28		in	1967
Minimum Dew Point		30		43		35		-5		50		in	2023		9		in	1978
Average  Dew Point		43		47		42		+1		54		in	2023		21		in	1978
Month Avg Max Dew Point		47.6		44.7		42.9		+4.7		47.8		in	2023		34.3		in	1965
Month Avg Min Dew Point		33.0		33.8		29.7		+3.3		37.3		in	2017		20.5		in	1982
Month Average Dew Point		40.3		39.3		36.3		+4.0		42.4		in	2017		28.9		in	1975
Precipitation		.00		.02		.14		-.14		2.00		in	1902
One Hour Rain		.00		.02						.38		in	2023
Half Hour Rain		.00		.02						.26		in	2023
Hourly Rain Rate		.00		.32						3.37		in	2023
Month Precipitation		3.54		4.08		4.27		-.73		11.94		in	1983		.78		in	1942
Year Precipitation		12.80		22.92		15.73		-2.93		31.21		in	1983		7.53		in	1985
Snow		0.0		0.0		0.0		+0.0		0.0		in	1997		0.0		in
Snow Depth		0		0		0.0		-0.0		1		in	1909		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 30, 2025								Record					Record
Observed Daily Data		2025		2024		Norm		Depart		Highest					Lowest
Maximum Humidity		89%		89%		87%		+2%		100%		in	2005		52%		in	1978
Minimum Humidity		36%		61%		47%		-11%		97%		in	2023		17%		in	1957
Average Humidity		63%		75%		67%		-5%		99%		in	1990		36%		in	1978
Maximum Barometer		30.10		30.07		30.10		+00.00		30.71		in	1934		29.48		in	2021
Minimum Barometer		29.78		29.91		29.85		-00.07		30.35		in	2006		29.16		in	2023
Average Barometer		29.94		29.99		29.98		-00.03		30.39		in	2006		29.37		in	2021
Average Wind		8.4		6.8		7.2		+1.2		16.3		in	1987		3.4		in	2013
Direction		NW		ESE		S				WNW					S
High Wind Gust		29		23		24		+5		45		in	1963		13		in	2019
Direction		SW		ESE		S				SSE					NW
Maximum Water Temp		52.0		50.9		50.6		+1.4		55.6		in	2012		41.9		in	2020
Minimum Water Temp		49.3		49.3		47.7		+1.6		52.3		in	2007		#N/A		in	2020
Average Water Temp		50.7		50.1		49.1		+1.5		53.8		in	2012		41.4		in	2020
Sunrise/ AM Twilight		6:30:55 AM						5:11:49 AM
Sunset / PM Twilight		7:42:16 PM						8:12:51 PM
Length Of Day		13:58:08
Special Conditions		None
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