Portsmouth Rhode Island Weather Almanac
Sunday, April 27, 2025
Mostly Cloudy early, Partly Cloudy Day to Mostly Cloudy PM, Very Windy, Cooler
		Climate Normal Period								Climate Record Period
		1991 - 2020								1893 - 2025
		April 27, 2025								Record					Record
Observed Daily Data		2025		2024		Norm		Depart		Highest					Lowest
Maximum Temperature		58		57		59		-1		81		in	1915		43		in	2020
Minimum Temperature		47		37		43		+4		53		in	1905		33		in	1987
Average Temperature		53		47		51		+2		66		in	1935		40		in	1898
Month Avg Max Temperature		56.1		55.0		54.7		+1.4		61.1		in	1976		47.9		in	1907
Month Avg Min Temperature		40.9		39.6		39.0		+1.9		43.3		in	2010		33.3		in	1943
Month Average Temperature		48.7		47.6		47.1		+1.6		52.0		in	2010		41.4		in	1907
High Heat Index										79		in	1935
Low Wind Chill		41		36		37		+4							23		in	1993
Heating Degree Days		12		18		14		-2		25		in	1898		0		in	1935
Month Heating DD		439		471		483		-44		637		in	1907		352		in	2010
Season Heating DD		4802		4703		5133		-331		6212		in	1904		4238		in	2012
Cooling Degree Days		0		0		0		+0		1		in	1935		0		in	All
Month Cooling DD						0				13		in	1976
Year Cooling DD						0				13		in	1976
Maximum Dew Point		51		42		47		+4		60		in	1905		27		in	1966
Minimum Dew Point		37		32		34		+3		53		in	1905		6		in	1966
Average  Dew Point		44		37		40		+4		57		in	1905		17		in	1966
Month Avg Max Dew Point		47.3		43.5		42.4		+4.9		47.3		in	2019		33.7		in	1965
Month Avg Min Dew Point		33.0		33.0		29.2		+3.8		36.6		in	2010		20.1		in	1982
Month Average Dew Point		40.1		38.3		35.8		+4.3		41.6		in	2010		28.5		in	1965
Precipitation		.00		.00		.14		-.14		1.77		in	1937
One Hour Rain		.00		.00						.58		in	1982
Half Hour Rain		.00		.00						.35		in	2007
Hourly Rain Rate		.00		.00						3.79		in	2007
Month Precipitation		3.54		3.98		3.85		-.31		11.92		in	1983		.47		in	1963
Year Precipitation		12.80		22.82		15.31		-2.51		31.19		in	1983		7.51		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 27, 2025								Record					Record
Observed Daily Data		2025		2024		Norm		Depart		Highest					Lowest
Maximum Humidity		98%		93%		89%		+9%		100%		in	2019		53%		in	1981
Minimum Humidity		55%		40%		52%		+3%		96%		in	1973		24%		in	1966
Average Humidity		77%		67%		71%		+6%		98%		in	1973		41%		in	1966
Maximum Barometer		30.01		30.55		30.06		-00.05		30.60		in	1966		29.45		in	2010
Minimum Barometer		29.74		30.35		29.82		-00.08		30.35		in	2024		29.20		in	2019
Average Barometer		29.88		30.45		29.94		-00.06		30.45		in	2024		29.33		in	2010
Average Wind		14.5		6.3		7.2		+7.3		17.7		in	2020		2.9		in	2008
Direction		WNW		SSW		SSW				N					E
High Wind Gust		44		29		24		+20		47		in	1947		11		in	2008
Direction		NNW		SSW		NNW				SW					ESE
Maximum Water Temp		50.0		50.7		49.5		+0.5		56.5		in	2007		40.8		in	2020
Minimum Water Temp		47.7		48.7		46.9		+0.8		52.0		in	2012		39.7		in	2020
Average Water Temp		48.9		49.7		48.2		+0.6		53.1		in	2012		40.3		in	2020
Sunrise/ AM Twilight		6:35:59 AM						5:16:08 AM
Sunset / PM Twilight		7:39:01 PM						8:09:20 PM
Length Of Day		13:52:40
Special Conditions		None
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