STEPHAN, SOUTH DAKOTA

Average Temperature

Years on Record: 107

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		7.1		-10		-7		-0.5		7.4		13.5		19.2		22.7		21.7		16.2		8.6		0.2		-7.2

Average High Temperature

Years on Record: 107

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		14.5		-3.4		-0.5		6.4		15.2		21.3		26.8		30.7		30.1		24.6		16.7		7.2		-0.9

Average Low Temperature

Years on Record: 107

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-0.4		-16.6		-13.5		-7.4		-0.5		5.7		11.6		14.6		13.3		7.8		0.6		-6.8		-13.5

Highest Recorded Temperature

Years on Record: 107

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		44.4		18.3		22.2		29.4		37.2		39.4		43.3		43.9		44.4		41.7		35		27.8		21.1

Lowest Recorded Temperature

Years on Record: 107

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-41.7		-41.7		-40		-31.7		-18.3		-10.6		-1.7		---		-0.6		-8.3		-21.7		-30		-38.9

Average Number of Days Above 100F/38C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		2.5		---		---		---		---		---		0.2		1.4		0.7		0.1		---		---		---

Average Number of Days Above 90F/32C

Years on Record: 107

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		32.9		---		---		---		0.2		0.9		4.5		12.2		11.1		3.9		0.2		---		---

Average Number of Days Above 80F/26C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		80.1		---		---		---		1.7		4.7		13.7		24.7		22.8		10.5		1.9		0.1		---

Average Number of Days Above 70F/21C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		134.4		---		---		1		5.7		15		25		30		29.5		20.2		7.4		0.6		---

Average Number of Days Above 60F/15C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		181		0.1		0.7		4		13.5		24.9		29.2		30.9		30.9		27.1		15.8		3.9		0.1

Average Number of Days Above 50F/10C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		223.9		1.2		3.4		10.2		21.9		29.9		30		31		31		29.6		24.7		9.9		1.2

Average Number of Days Above 40F/4C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		265.1		5.6		8.9		17.5		27.1		31		30		31		31		30		29.5		17		6.6

Average Number of Days Below 70F/21C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		362.2		31		28		31		30		31		29.6		29.4		30.2		29.9		31		30		31

Average Number of Days Below 60F/15C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		331.2		31		28		31		30		30.1		24.1		17		20.1		28		30.9		30		31

Average Number of Days Below 50F/10C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		271.9		31		28		31		29.3		23.6		10.1		2.7		5		20		30.3		30		31

Average Number of Days Below 40F/4C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		219.4		31		28		30.4		24.8		10.7		1.2		---		0.5		7.6		24.5		29.8		31

Average Number of Days Below 32F/0C

Years on Record: 107

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		181.9		30.6		27.8		28.1		17		4.4		0.1		---		---		2.2		14.4		26.7		30.5

Average Number of Days Below 20F/-6C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		110.9		26.9		21.5		14.8		3.3		0.1		---		---		---		0.1		2.9		14.7		26.6

Average Number of Days Below 10F/-12C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		61.3		18.9		13.4		5.8		0.4		---		---		---		---		---		0.4		5.5		17

Average Number of Days Below 0F/-17C

Years on Record: 107

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		36.8		14		9		3.2		---		---		---		---		---		---		---		1.6		9

Average Precipitation

Years on Record: 107

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		477		11		14		25		47		73		79		72		54		42		36		14		10

Average Number of Days With Precipitation

Years on Record: 107

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		60		3		3		4		6		8		8		7		6		5		4		3		3

Most Reported Precipitation in a Month

Years on Record: 107

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		212		48		51		100		146		199		189		212		165		179		180		71		36

Least Reported Precipitation in a Month

Years on Record: 107

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		---		---		---		1		2		7		11		6		1		---		---		---		---

Most Precipitation Reported in a Day

Years on Record: 107

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		114.8		29.5		40.1		55.9		52.6		71.6		73.7		114.8		86.4		78.7		57.1		41.9		16.5

Avg. No. of Days w/Precip. Above 0.1in/2.5mm

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		45		1.2		1.7		2.9		4.6		6.3		6.6		5.4		4.8		4.1		3.8		2		1.6

Avg. No. of Days w/Precip. Above 0.2in/5mm

Years on Record: 107

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		41		2		2		2		4		6		6		5		4		3		3		2		2

Avg. # of Days w/Precip. Above 0.4in/10mm

Years on Record: 107

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		11		---		---		1		1		2		2		2		1		1		1		---		---

Avg. No. of Days w/Precip. Above 0.5in/13mm

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		12.7		0.1		0.1		0.7		1.1		1.9		2.3		1.7		1.6		1.4		1.2		0.4		0.2

Avg. No. of Days w/Precip. Above 1in/25mm

Years on Record: 107

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

Average Snowfall

Years on Record: 107

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		75.2		12.4		16		16.8		7.1		0.2		---		---		---		---		2		8.6		11.9

Average Number of Days With Snow

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		14		2.3		2.8		2.7		1.5		---		---		---		---		---		0.3		1.8		2.6

Most Snow Reported in a Month

Years on Record: 107

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		91.4		55.9		55.9		88.9		61		6.9		---		---		---		5.1		22.9		91.4		54.6

Avg. No. of Days w/Snow Above 1in/2.5cm

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		11.1		1.6		2.1		2.3		1.4		---		---		---		---		---		0.3		1.5		1.9

Avg. No. of Days w/Snow Above 3in/7.5cm

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		5.2		0.5		1.2		1.1		0.7		---		---		---		---		---		0.1		0.8		0.8

Avg. No. of Days w/Snow Above 5in/12.7cm

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		2.2		0.3		0.5		0.6		0.2		---		---		---		---		---		0.1		0.3		0.2

Avg. No. of Days w/Snowfall Above 10in/25cm

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		0.5		---		0.1		0.1		0.1		---		---		---		---		---		---		0.1		0.1

Heating Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		8103		1530		1254		1048		614		290		74		11		28		192		574		1021		1466

Cooling Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		652		---		---		---		2		19		105		254		211		59		2		---		---

Growing Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		2551		---		---		5		60		231		483		708		648		336		77		4		---

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		13		11.4		10.1		9.5

Average Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		14.2		6.1		8.9		12.7		17.1		20.6		22.8		23.1		20.3		15.5		10.7		6.7		5.2

Average Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		5.1		2.3		3.4		4.9		6.6		7.9		8.3		7.7		6.6		5.2		3.7		2.6		2

Average Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		16.3		12.2		13.9		16.2		17.8		18.9		19.8		20.6		20.2		18.2		15.8		12.2		10.2

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		17.6		12.4		14		16.1		18.3		20.5		22.9		24.5		22.9		19.6		16.6		12.6		11.3

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		14.2		6.1		8.9		12.7		17.1		20.6		22.8		23.1		20.3		15.5		10.7		6.7		5.2

Maximum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		5.5		2.4		3.5		5.2		7		8.4		8.9		8.7		7.2		5.8		4		2.7		2.1

Maximum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		19.4		14.3		19.3		19.5		22		22.3		22.1		22.3		22.8		21.1		18.3		15		13.2

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		22.9		15.3		21.7		21.5		26.1		27.8		28.4		28.7		28.4		24.4		20.1		16.6		15.8

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		11.5		5.4		7.5		9.3		13.9		15.8		20.3		18		17.8		11.8		9		5		4.2

Minimum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		4.5		2.1		2.7		4.5		5.7		7		7.6		7.1		5.8		4.6		3.4		2.3		1.8

Minimum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		12.7		10.1		11		11		14.1		14.5		17.7		16		17.5		13.1		12.4		8		7.5

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		11.7		9.8		10		8.6		12.1		12		18.1		14.9		17.8		11.4		11.7		7.1		7.5