NORRIS, MONTANA

Average Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		42.4		25.5		28		32.4		39		47.4		56		62.4		62.2		53.2		44.1		32.2		26.2

Average High Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		51.8		33.2		36.3		41.5		48.9		57.7		66.9		73.8		73.4		63.9		53.4		39.2		33.2

Average Low Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		33		17.8		19.7		23.2		29.1		37.1		45.1		50.9		51		42.5		34.8		25.1		19.2

Highest Recorded Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		79.5		43		44.9		49.5		61.3		63.7		78.2		79.5		78.6		71.6		60.8		51.6		41.4

Lowest Recorded Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		6.1		6.5		6.2		16.1		21.3		33.5		40.4		43.5		45.7		36		29.8		10.3		6.1

Average Number of Days Above 90F/32C

Years on Record: 26

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		18.6		---		---		---		---		---		1.3		7.9		8		1.4		---		---		---

Average Number of Days Below 32F/0C

Years on Record: 26

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		189.8		28.3		24.3		26.6		19.9		10.1		1.5		0.6		1.4		9.8		17.7		22.8		26.9

Average Number of Days Below 0F/-17C

Years on Record: 26

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		19.3		8.3		3		2.1		0.2		---		---		---		---		---		0.1		2.4		3.4

Average Precipitation

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		25.7		1.3		1.2		2.1		2.8		3.8		3.1		2.4		1.9		2.1		2.1		1.5		1.5

Average Number of Days With Precipitation

Years on Record: 26

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		79		4		4		6		8		11		12		6		6		7		6		5		4

Most Reported Precipitation in a Month

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		8		3		3.5		4.8		7.8		7.7		8		4.7		3.9		4.6		5.6		3.4		3.7

Least Reported Precipitation in a Month

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		0.1		0.2		0.1		0.8		0.2		1		0.9		0.5		0.3		0.3		0.3		0.5		0.1

Most Precipitation Reported in a Day

Years on Record: 26

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		3.7		0.8		0.6		1.2		1.5		1.9		2.1		1.8		1.2		3.7		1.5		1		0.6

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

Years on Record: 26

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		43		1		2		3		5		7		7		3		3		4		4		3		1

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

Years on Record: 26

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

Average Snowfall

Years on Record: 26

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		58.4		7.9		6.3		16.9		7.8		1.8		---		---		---		0.9		1.7		8.3		6.8

Average Snow Cover

Years on Record: 26

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

Most Snow Reported in a Month

Years on Record: 26

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		49		34		13.5		49		20		24.6		0.5		---		---		6.3		6		18		15

Heating Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		8392		1225		1036		1013		779		546		285		142		159		371		647		986		1203

Cooling Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		164		---		---		---		---		---		14		60		73		17		---		---		---

Growing Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		1038.6		---		---		---		---		---		180		384.4		378.2		96		---		---		---

Average Length of Day

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hours		12.8		9.7		11		12.5		14.1		15.5		16.3		15.9		14.6		13		11.4		10		9.3

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		1.6		2.6		3.7		4.8		5.6		6.3		6.7		5.8		4.4		2.9		1.8		1.4

Average Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		1.7		0.9		1.3		1.8		1.9		2.5		2.6		2.6		2.2		1.9		1.4		1		0.8

Average Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		4.4		2.8		3.9		4.6		5		5.1		5.4		5.9		5.8		5.1		3.9		2.9		2.4

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		4.4		2.4		3.5		4.1		5.1		5.2		5.9		6.7		6.1		4.9		3.7		2.6		2.2

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		1.6		2.6		3.7		4.8		5.6		6.3		6.7		5.8		4.4		2.9		1.8		1.4

Maximum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		1.8		1		1.4		1.9		2		2.5		2.7		2.9		2.4		2.1		1.5		1.1		0.9

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		3.2		4.3		5.2		5.9		6		6.2		6.8		6.4		5.9		4.6		3.4		2.7

Maximum 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		2.8		3.9		4.7		6.3		6.7		7.3		7.7		6.9		5.9		4.4		3		2.5

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		3.4		1.4		2.3		3.2		4.2		4.9		5.3		5.1		5.2		3.4		2.5		1.5		1.2

Minimum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		1.7		0.8		1.2		1.7		1.9		2.4		2.6		2.5		2.2		1.7		1.3		0.9		0.7

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		2.5		3.4		4		4.4		4.5		4.6		4.6		5.2		3.8		3.4		2.4		2.1

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		3.4		2.1		3		3.3		4.2		4		4.2		4.2		5.2		3.3		3.1		2.1		1.9