Portsmouth Rhode Island Weather Almanac
Saturday, May 10, 2025
Cloudy, Light Rain & Fog early, Partly Cloudy Evening, Cooler
		Climate Normal Period								Climate Record Period
		1991 - 2020								1893 - 2025
		May 10, 2025								Record					Record
Observed Daily Data		2025		2025		Norm		Depart		Highest					Lowest
Maximum Temperature		65		59		63		+2		89		in	1896		45		in	1924
Minimum Temperature		49		45		47		+2		59		in	1979		34		in	1977
Average Temperature		57		52		55		+2		71		in	1979		42		in	1977
Month Avg Max Temperature		66.8		61.6		61.5		+5.3		73.3		in	1930		50.8		in	1917
Month Avg Min Temperature		52.4		46.4		45.5		+6.9		52.4		in	2025		38.7		in	1917
Month Average Temperature		59.7		54.3		53.6		+6.1		62.9		in	1930		45.0		in	1917
High Heat Index										88		in	1896
Low Wind Chill		44		41											27		in	2020
Heating Degree Days		8		13		10		-2		23		in	1977		0		in	1979
Month Heating DD		53		107		114		-61		200		in	1917		33		in	1930
Season Heating DD		4868		4838		5287		-419		6351		in	1905		4408		in	2012
Cooling Degree Days		0		0		0		+0		6		in	1979		0		in	All
Month Cooling DD		0		0		0		+0		19		in	2001		0		in	Many
Year Cooling DD		0		0		0		+0		19		in	2001		0		in	Many
Maximum Dew Point		54		47		51		+3		63		in	2015		26		in	1962
Minimum Dew Point		49		37		40		+9		55		in	2015		12		in	1962
Average  Dew Point		52		42		45		+7		59		in	2015		19		in	1962
Month Avg Max Dew Point		59.2		53.1		49.6		+9.6		59.2		in	2025		36.5		in	1952
Month Avg Min Dew Point		49.4		42.9		38.0		+11.4		49.4		in	2025		25.3		in	1968
Month Average Dew Point		54.6		48.3		43.8		+10.8		54.6		in	2025		32.1		in	1968
Precipitation		.15		.16		.11		+.04		.97		in	2021
One Hour Rain		.07		.11						.32		in	1990
Half Hour Rain		.05		.07						.16		in	2012
Hourly Rain Rate		.38		.11						1.23		in	2021
Month Precipitation		2.90		1.64		1.17		+1.73		4.26		in	1972		.00		in	2015
Year Precipitation		15.70		24.56		16.90		-1.20		31.60		in	1983		10.05		in	1927
Snow		0.0		0.0		0.0		+0.0		T		in	1977		0.0		in	Many
Snow Depth		0		0		0				2		in	1977		0		in	Many
Month Snow		0.0		0.0		T				1.7		in	1977		0.0		in	Many
Season Snow		11.9		12.7		33.8		21.9		84.1		in	1996		5.0		in	1998
		May 10, 2025								Record					Record
Observed Daily Data		2025		2024		Norm		Depart		Highest					Lowest
Maximum Humidity		98%		94%		87%		+11%		100%		in	2015		43%		in	1962
Minimum Humidity		68%		54%		51%		+17%		95%		in	1998		14%		in	1962
Average Humidity		83%		74%		69%		+14%		98%		in	1998		29%		in	1962
Maximum Barometer		30.06		29.85		30.03		+00.03		30.39		in	2022		29.59		in	1964
Minimum Barometer		29.70		29.71		29.79		-00.09		30.29		in	2022		29.20		in	1945
Average Barometer		29.88		29.78		29.91		-00.03		30.34		in	2022		29.50		in	1969
Average Wind		8.5		9.0		8.0		+0.5		15.6		in	1956		2.3		in	1994
Direction		NW		NE		WNW				SSW					SW
High Wind Gust		33		23		26		+7		44		in	1964		13		in	1953
Direction		WNW		E		WNW				WNW					SW
Maximum Water Temp		55.9		53.1		53.4		+2.5		60.3		in	2007		44.2		in	2020
Minimum Water Temp		54.1		51.8		50.3		+3.8		54.3		in	2023		42.1		in	2020
Average Water Temp		55.0		52.5		51.8		+3.2		57.1		in	2007		43.2		in	2020
Sunrise/ AM Twilight		5:30:25 AM						4:58:49 AM
Sunset / PM Twilight		7:52:52 PM						8:24:26 PM
Length Of Day		14:22:42
Special Conditions		Fog
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