ROLLINS, MONTANA

Average Temperature

Years on Record: 73

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		7.9		-2.4		-0.6		2.3		7.1		11.6		15.3		19.6		18.9		13.9		8.1		2.1		-1.2

Average High Temperature

Years on Record: 73

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		13.2		0.7		3.1		7.1		12.8		18		21.7		27.3		26.4		20.5		13.2		5.4		1.8

Average Low Temperature

Years on Record: 73

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		2.6		-5.6		-4.3		-2.3		1.3		5.2		8.8		11.8		11.3		7.2		3		-1.3		-4.1

Highest Recorded Temperature

Years on Record: 73

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		38.3		17.8		16.7		21.1		29.4		32.2		35		37.8		38.3		35		27.8		20		16.1

Lowest Recorded Temperature

Years on Record: 73

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-32.8		-28.9		-29.4		-23.9		-11.7		-6.1		-0.6		---		1.7		-5.6		-13.9		-22.2		-32.8

Average Number of Days Above 90F/32C

Years on Record: 73

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		8.2		---		---		---		---		---		0.5		4.7		2.8		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		37.5		---		---		---		---		0.9		3.9		15.7		14.8		2.3		---		---		---

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		92.2		---		---		---		1		7.6		15.3		27.1		27.6		12.7		1		---		---

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		148.8		---		0.1		1.2		7.1		19.4		26.9		30.8		30.5		24.3		8		0.6		---

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		209.1		0.7		1		7.5		20.1		29.6		29.9		31		31		29.3		23.8		4.9		0.3

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		285.2		9.4		11.6		24.7		29.4		31		30		31		31		30		30.3		19.1		7.7

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		364.9		31		28		31		30		31		30		30.9		31		30		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		356.1		31		28		31		30		31		29.6		26.2		27.4		29.8		31		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		290.9		31		28		30.9		29.9		27.7		17.6		5.6		6		23		30.2		29.9		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		205.7		30.6		27.8		29.7		24.6		11.1		1.1		0.1		0.2		4.1		18.6		27.2		30.7

Average Number of Days Below 32F/0C

Years on Record: 73

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		137		26.1		23.5		22.5		11.5		1.9		---		---		---		0.7		6.9		18.5		25.4

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		27.9		8.3		6.6		2.5		---		---		---		---		---		---		0.4		2.7		7.4

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		8.7		2.6		2.5		0.5		---		---		---		---		---		---		---		0.9		2.2

Average Number of Days Below 0F/-17C

Years on Record: 73

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		4		1.9		0.9		0.2		---		---		---		---		---		---		---		0.2		0.8

Average Precipitation

Years on Record: 73

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		558		45		30		34		42		68		81		37		39		46		41		46		48

Average Number of Days With Precipitation

Years on Record: 73

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		107		11		8		9		9		10		11		6		6		7		8		10		12

Most Reported Precipitation in a Month

Years on Record: 73

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		209		102		94		88		98		185		209		140		147		159		138		122		156

Least Reported Precipitation in a Month

Years on Record: 73

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		---		4		2		---		---		8		25		---		---		---		---		10		9

Most Precipitation Reported in a Day

Years on Record: 73

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		127		31.5		23.9		33		43.9		127		63.5		90.2		45.7		52.1		64		29.2		28.4

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		59.3		4.5		3.5		4.6		5.1		7.1		7		3.8		3.5		4.4		4.7		5.7		5.4

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

Years on Record: 73

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		62		6		4		4		5		6		7		4		4		5		5		6		6

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

Years on Record: 73

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		12		1		---		---		1		2		2		1		1		1		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		10.3		0.5		0.3		0.6		0.9		1.7		1.8		0.9		1		1.1		0.8		0.5		0.2

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

Years on Record: 73

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

Average Snowfall

Years on Record: 73

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		131.3		42.4		21.6		13.7		1.8		0.5		---		---		---		---		0.8		15.8		34.8

Average Snow Cover

Years on Record: 61

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		5		15		12		7		---		---		---		---		---		---		---		2		10

Most Snow Reported in a Month

Years on Record: 73

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		144.3		134.1		82.8		56.6		17.8		11.4		---		---		---		2.5		24.6		88.9		144.3

Heating Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		6932		1096		949		849		607		378		178		46		49		243		566		859		1111

Cooling Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		234		---		---		---		---		3		19		109		94		9		---		---		---

Growing Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		1764		---		---		1		19		134		295		529		510		231		42		2		---

Average Length of Day

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hours		12.8		9.5		10.8		12.5		14.3		15.8		16.6		16.2		14.8		13		11.3		9.8		9.1

Average Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		13.2		4.8		8.1		12.4		16.8		19.6		20.8		23.3		19.9		14.4		9.1		5.4		4.1

Average Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		6.1		2.8		4.2		6.2		7.6		8.9		9.5		9.3		8.1		6.5		4.6		3.1		2.5

Average Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		14.8		8.3		12.5		15.8		17.6		18		18.1		20.8		19.9		16.7		12.6		9.3		7.6

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		14.4		7.6		11		13.8		17		18		18.6		23.3		20.9		15.9		11.8		8		6.8

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		13.2		4.8		8.1		12.4		16.8		19.6		20.8		23.3		19.9		14.4		9.1		5.4		4.1

Maximum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		6.5		3.2		4.5		6.8		7.7		9.1		9.7		10.2		8.6		7.5		5		3.6		2.8

Maximum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		17.3		9.8		13.6		18.9		19.9		20.6		21.1		24		22.6		21.8		14.8		11.6		9.1

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		17.9		9.1		12.4		18		20.6		22.8		24.6		27.8		24.7		22		14.2		10.2		8.3

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		11.2		4.4		7.1		10.9		15.1		16.6		18		18.2		17.6		11		7.5		4.8		3.3

Minimum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		5.8		2.6		3.8		5.8		7.5		8.8		9.4		9.1		7.9		5.9		4		2.9		2.1

Minimum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		12.3		7.4		10.7		13.6		15.5		15.1		15.6		16.2		17.5		12.3		10		7.9		5.8

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		10.8		6.5		9.2		11.3		13.5		12.6		13.7		14.8		16.9		10.3		9		6.7		5