BOX ELDER, SOUTH DAKOTA

Average Temperature

Years on Record: 50

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		48		23		27		33		46		56		65		74		72		62		50		36		27

Average High Temperature

Years on Record: 50

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		58		32		36		43		56		67		76		86		85		74		62		46		37

Average Low Temperature

Years on Record: 50

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		36		12		16		23		34		45		54		61		60		49		39		26		17

Highest Recorded Temperature

Years on Record: 50

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		111		74		75		82		91		97		108		111		108		103		94		77		74

Lowest Recorded Temperature

Years on Record: 50

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		-29		-25		-23		-18		5		20		31		42		40		19		13		-14		-29

Average Number of Days Above 80F/26C

Years on Record: 50

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		77		---		---		1		4		11		24		23		11		3		---		---		---

Average Number of Days Below 32F/0C

Years on Record: 50

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		153		29		26		25		12		2		---		---		---		1		8		22		28

Average Number of Days Below 0F/-17C

Years on Record: 50

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		15		7		3		1		---		---		---		---		---		---		---		1		3

Average Precipitation

Years on Record: 46

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in.		16.6		0.5		0.6		1		1.8		2.9		3		2		1.5		1.1		1		0.7		0.4

Average Precipitable Water

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in.		0.5		0.3		0.3		0.3		0.4		0.6		0.8		0.9		0.9		0.7		0.5		0.3		0.3

Average Number of Rainy Days

Years on Record: 46

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		87		6		6		8		8		11		11		8		7		6		5		5		6

Average Number of Days With Thunderstorms

Years on Record: 46

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		39		---		---		1		1		5		10		10		8		3		1		---		---

Most Rain Reported in a Day

Years on Record: 46

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in.		3.3		1.2		1		2.2		1.8		3.1		3.3		3.2		1.3		1.9		2.1		1.1		0.5

Most Rain Reported in a Month

Years on Record: 46

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in.		27.2		1.7		2.2		3.1		5.6		9.8		7.7		5.7		4.1		3.6		3.5		2.9		1.1

Least Rain Reported in a Month

Years on Record: 46

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in.		9.2		---		---		0.1		---		0.2		0.8		---		0.1		---		---		0.1		---

Average Snowfall

Years on Record: 44

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in.		40.5		4.7		6.9		8.9		6.8		0.6		0.2		---		---		0.1		1.4		5.3		5.3

Average Number of Days With Snow

Years on Record: 44

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		36		6		6		7		4		1		---		---		---		1		1		4		6

Deepest Snow Cover Reported

Years on Record: 44

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in.		23		13		15		15		23		10		6		---		---		2		6		17		14

Most Snow Reported in a Day

Years on Record: 44

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in.		95.2		9.7		14.2		18		4.5		5.9		---		---		2.1		5		12		5.8		18

Most Snow Reported in a Month

Years on Record: 44

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in.		89.5		18.7		19.7		28.7		42.8		7.1		6.1		---		---		2.7		8.2		30.5		11

Average Relative Humidity

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		61.3		67.6		66.8		64.2		61.6		63.3		63.9		56.8		52.8		53.2		58		63.1		65.9

Average Morning Relative Humidity

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		62.1		61		62.1		65.9		58.9		65.5		63.6		59.2		61.9		61.8		62.6		61.7		61.3

Average Evening Relative Humidity

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		44.5		49		46.8		50.3		41.3		48.3		45.7		37.6		38.1		39.4		41.4		45.2		50.2

Average Dew Point

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		31		13		14		21		28		40		48		52		51		40		31		20		11

Average Wet Bulb

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		40		22		23		30		38		48		56		61		60		50		41		30		20

Heating Degree Days

Years on Record: 52

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		6959		1294		1064		976		578		295		87		7		16		166		448		859		1169

Cooling Degree Days

Years on Record: 52

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		743		---		---		---		3		21		104		283		251		74		7		---		---

Growing Degree Days

Years on Record: 50

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		2422		---		---		---		---		186		450		744		682		360		---		---		---

Average Length of Day

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hours		12.8		9.9		11		12.5		14		15.4		16.1		15.7		14.5		12.9		11.4		10.1		9.5

Average Number of Days With Fog

Years on Record: 46

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		53		5		7		7		6		5		4		2		2		3		3		4		5

Average Possibility of Clouds

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		50.5		51.8		54.7		59.3		55.5		56.7		48.2		43.5		39.7		43.3		48.2		54.3		51

Average Total Sky Cover

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		56.4		58.2		58.6		62		65.7		62.8		59.9		50.2		47.2		46.9		54.3		56.6		54.3

Average Opaque Sky Cover

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		46.3		47.8		47.8		52.6		54.8		52.4		48.3		39.7		37.2		38.7		45.8		46		44.5

Average Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		4.1		1.7		2.6		3.6		4.9		5.9		6.6		6.6		5.8		4.5		3.1		1.9		1.5

Average Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		1.4		0.6		0.9		1.4		1.8		2.2		2.3		2.1		1.8		1.4		1		0.7		0.5

Average Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		4.7		3.4		4.1		4.6		5.1		5.4		5.7		5.9		5.8		5.4		4.6		3.5		3

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		5.2		3.5		4.2		4.6		5.3		6.1		6.8		7.2		6.7		6		4.9		3.7		3.4

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		4.1		1.7		2.6		3.6		4.9		5.9		6.6		6.6		5.8		4.5		3.1		1.9		1.5

Maximum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		1.5		0.7		1		1.4		1.9		2.3		2.4		2.4		1.9		1.6		1.1		0.8		0.6

Maximum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		5.5		4.3		4.8		5.5		6.4		6.2		6.4		6.5		6.4		6		5.3		4.5		4

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		6.7		4.7		5.4		6.2		7.9		7.7		8.6		8.8		8.1		7.1		5.9		5.1		5

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		3.3		1.4		1.9		3		4.1		4.1		5.9		5.5		5.4		3.5		2.6		1.5		1.1

Minimum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		1.2		0.6		0.8		1.2		1.5		1.9		2		1.8		1.6		1.3		0.9		0.6		0.4

Minimum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		3.7		2.6		2.7		3.6		4.2		3.8		5.1		4.9		5.3		3.9		3.7		2.5		1.9

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		3.5		2.4		2.3		3.2		3.8		3		5.5		5		5.8		3.6		3.6		2.2		1.9