Portsmouth Rhode Island Weather Almanac
Monday, April 28, 2025
Clear and Much Warmer
		Climate Normal Period								Climate Record Period
		1991 - 2020								1893 - 2025
		April 28, 2025								Record					Record
Observed Daily Data		2025		2024		Norm		Depart		Highest					Lowest
Maximum Temperature		75		59		59		+16		82		in	1990		39		in	1898
Minimum Temperature		45		43		43		+2		55		in	1935		32		in	1992
Average Temperature		60		51		51		+9		67		in	1935		38		in	1916
Month Avg Max Temperature		56.8		55.1		54.8		+2.0		61.0		in	1976		48.0		in	1907
Month Avg Min Temperature		41.0		39.8		39.1		+1.9		43.0		in	2010		33.6		in	1943
Month Average Temperature		49.1		47.7		47.3		+1.9		51.6		in	2010		41.5		in	1907
High Heat Index										82		in	1990
Low Wind Chill		42		38		36		+6							22		in	1993
Heating Degree Days		5		14		14		-9		27		in	1916		0		in	1990
Month Heating DD		444		485		497		-53		657		in	1907		374		in	2010
Season Heating DD		4807		4717		5147		-340		6229		in	1904		4256		in	2012
Cooling Degree Days		0		0		0		+0		2		in	1935		0		in	All
Month Cooling DD						0				13		in	1976
Year Cooling DD						0				13		in	1976
Maximum Dew Point		47		52		47		+0		60		in	2017		26		in	1967
Minimum Dew Point		32		36		34		-2		53		in	1905		5		in	1993
Average  Dew Point		40		44		41		-1		57		in	1905		19		in	1993
Month Avg Max Dew Point		47.3		43.8		42.6		+4.7		47.4		in	2023		34.0		in	1965
Month Avg Min Dew Point		32.9		33.1		29.4		+3.6		36.9		in	2017		20.4		in	1982
Month Average Dew Point		40.1		38.5		36.0		+4.1		42.0		in	2017		28.6		in	1975
Precipitation		.00		.08		.14		-.14		2.93		in	1904
One Hour Rain		.00		.03						.53		in	1988
Half Hour Rain		.00		.02						.10		in	2005
Hourly Rain Rate		.00		.00						.84		in	2008
Month Precipitation		3.54		4.06		3.99		-.45		11.94		in	1983		.47		in	1963
Year Precipitation		12.80		22.90		15.45		-2.65		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		0		in			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 28, 2025								Record					Record
Observed Daily Data		2025		2024		Norm		Depart		Highest					Lowest
Maximum Humidity		82%		96%		89%		-7%		100%		in	2018		54%		in	1967
Minimum Humidity		22%		64%		50%		-28%		96%		in	1905		18%		in	2001
Average Humidity		52%		80%		69%		-17%		98%		in	1905		41%		in	1972
Maximum Barometer		30.24		30.35		30.07		+00.17		30.68		in	1966		29.60		in	2010
Minimum Barometer		30.01		29.99		29.82		+00.19		30.33		in	1966		29.20		in	1973
Average Barometer		30.13		30.17		29.95		+00.18		30.51		in	1966		29.40		in	1973
Average Wind		7.6		7.0		7.8		-0.2		19.9		in	1967		1.1		in	1965
Direction		NNW		S		N				NNE					S
High Wind Gust		22		20		26		-4		51		in	1967		13		in	2007
Direction		NNW		SSW		N				NNE					SSE
Maximum Water Temp		50.2		49.6		49.8		+0.4		55.6		in	2007		41.4		in	2020
Minimum Water Temp		48.4		48.2		47.2		+1.2		51.6		in	2023		39.4		in	2020
Average Water Temp		49.3		48.9		48.5		+0.8		52.6		in	2012		40.4		in	2020
Sunrise/ AM Twilight		6:34:18 AM						5:14:40 AM
Sunset / PM Twilight		7:40:06 PM						8:10:30 PM
Length Of Day		13:55:07
Special Conditions		None
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