Portsmouth Rhode Island Weather Almanac
Sunday, December 16, 2018
Partly Cloudy early then Moderate Rain and Fog, Windy, Continued Warm
Climate Normal Period						Climate Record Period
1981- 2010						1893 - 2018
		December 16, 2018								Record					Record
Observed Daily Data		Observed		2017		Normal		Depart		Highest					Lowest
Maximum Temperature		43		34		42		+1		62		in	1971		18		in	1910
Minimum Temperature		40		22		28		+12		43		in	1971		6		in	1910
Average Temperature		42		28		35		+7		53		in	1971		12		in	1910
Precipitation		.73		T		.14		+.59		1.95		in	1960
One Hour		.15		.00						.37		in	1960
Snow		0.0		T		0.2		-0.2		6.2		in	1989
Snow Depth		0		4						11		in	1904
HDD		23		37		30		-7		53		in	1910		12		in	1971
CDD		0		0		0		+0		0		in
Maximum Dew Point		40		25		34		+6		58		in	1971		4		in	1961
Minimum Dew Point		35		15		18		+17		35		in	2018		-10		in	1961
Average  Dew Point		38		20		26		+12		45		in	1982		-3		in	1961
Maximum Humidity		96%		90%		86%		+10%		100%		in	2005		52%		in	1951
Minimum Humidity		79%		56%		58%		+21%		89%		in	2014		22%		in	1961
Average Humidity		88%		73%		72%		+16%		93%		in	2014		39%		in	1988
Maximum Barometer		30.18		30.19		30.13		+00.05		30.62		in	1994		29.54		in	1987
Minimum Barometer		29.65		29.82		29.78		-00.13		30.49		in	1994		28.87		in	1972
Average Barometer		29.92		30.01		29.96		-00.04		30.56		in	1994		29.25		in	1987
Average Wind		14.1		10.5		8.7		+5.4		17.0		in	1972		1.2		in	1986
Direction		NE		W		WNW				W					E
High Wind Gust		33		25		28		+5		56		in	1927		10		in	1986
Direction		NNE		W		WNW				W					W
High Heat Index
Wind Chill		31		11		18		+13							-9		in	1951
Maximum Water Temp		44.8		44.9		45.9		-1.1		51.3		in	2011		39.4		in	2010
Minimum Water Temp		42.6		40.6		43.4		-0.8		49.8		in	2015		36.7		in	2010
Average Water Temp		43.7		42.8		44.6		-0.9		50.5		in	2011		38.1		in	2010
Sunrise/ AM Twilight		7:05:44 AM						6:34:27 AM
Sunset / PM Twilight		4:16:49 PM						4:48:06 PM
Length Of Day		9:11:05
Special Conditions		Fog
Comments
		December 16, 2018								Record					Record
Month-to-Date Summary		Observed		2017		Normal		Depart		Highest					Lowest
Avg Maximum Temperature		42.3		42.6		44.3		-1.9		54.4		in	2015		30.4		in	1904
Avg Minimum Temperature		29.1		30.4		30.6		-1.5		42.1		in	2015		16.3		in	1989
Average Temperature		35.7		36.5		37.4		-1.7		48.3		in	2015		24.7		in	1904
Total Precipitation		1.93		1.19		2.35		-.42		7.06		in	1981		.20		in	1998
Total Snow		T		6.1		3.1		-3.1		19.9		in	1981		0.0		in
Total HDD		464		452		438		+26		642		in	1904		263		in	2015
Total CDD		0		0		0		+0		807		in	2016		290		in	1902
Avg Maximum Dew Point		33.7		34.8		36.2		-2.5		48.6		in	2015		18.7		in	1989
Avg Minimum Dew Point		19.6		21.4		19.4		+0.2		37.7		in	2015		-1.2		in	1989
Average  Dew Point		26.7		28.1		27.1		-0.4		43.1		in	2015		8.8		in	1989
		December 16, 2018								Record					Record
Year-to-Date Summary		Observed		2017		Normal		Depart		Highest					Lowest
Total Precipitation		51.16		40.30		46.20		+4.96		63.81		in	1983		27.10		in	1965
Total Snow (since Jul 1 18)		4.2		6.1		4.2		-0.0		21.1		in	1898		0.0		in
Total HDD (since Jul 1 18)		1524		1249		1470		+54		1954		in	1904		1058		in	2015
Total CDD (since Jan 1)		775		580		563		+212		807		in	2016		290		in	1902
Hour-by-Hour Weather For December 16, 2018
Climate Weather for December 16
Weather History For December 16
Weather Calendar
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