POWER, MONTANA

Average Precipitation

Years on Record: 58

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		294		11		9		14		26		52		55		30		34		27		15		11		10

Average Number of Days With Precipitation

Years on Record: 58

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		85		7		6		8		8		9		9		7		7		7		5		6		6

Most Reported Precipitation in a Month

Years on Record: 58

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		188		31		33		53		77		188		133		140		133		98		71		37		36

Least Reported Precipitation in a Month

Years on Record: 58

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		---		---		1		---		---		8		7		1		1		1		---		---		---

Most Precipitation Reported in a Day

Years on Record: 58

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		85.8		9.7		15.5		20.6		44.2		85.8		60.5		43.9		66.8		42.7		21.1		12.2		16.8

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		30.7		0.9		0.7		2		3.2		4.6		4.6		2.8		3.5		3.3		2.6		1.4		1.1

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

Years on Record: 58

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		31		1		1		2		3		5		5		3		3		3		2		2		1

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

Years on Record: 58

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		4		---		---		---		---		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		5.2		---		---		0.2		0.4		1.2		1.3		0.6		0.8		0.6		0.1		---		---

Average Snowfall

Years on Record: 58

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		125.5		18.3		14.5		20.8		21.1		5.8		1		---		0.2		3.6		8.4		15.2		16.5

Average Number of Days With Snow

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		40.7		6.2		6.5		6.9		4.8		1.6		0.1		---		0.1		0.6		2.3		5.4		6.2

Most Snow Reported in a Month

Years on Record: 58

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		76.5		55.4		44.5		76.5		66.5		53.1		24.6		---		20.6		24.6		36.8		52.1		58.4

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		15.6		2.2		1.7		2.6		2.3		0.8		0.1		---		---		0.5		1.3		2		2.1

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		4.5		0.3		0.3		0.8		0.8		0.4		0.1		---		---		0.2		0.5		0.5		0.6

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		1.7		0.2		0.1		0.3		0.5		0.2		0.1		---		---		---		0.1		0.1		0.1

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		0.1		---		---		---		0.1		---		---		---		---		---		---		---		---

Avg. # of Days w/Snow Depth Above 1in/2.5cm

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		85.7		19.7		16.9		11.8		5.4		1.5		0.1		---		---		0.5		2.9		9.8		17.1

Avg. # of Days w/Snow Depth Above 3in/7.5cm

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		32.2		7.4		6.3		5.1		1.8		0.4		0.1		---		---		0.1		0.5		4.1		6.4

Avg. # of Days w/Snow Depth Above 5in/12.7cm

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		13.9		3.5		2.2		2.7		0.6		0.3		---		---		---		---		0.1		1.4		3.1

Avg. # of Days w/Snow Depth Above 10in/25cm

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		0.7		---		0.1		0.3		0.1		0.1		---		---		---		---		---		---		0.1

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		10.9		12.5		14.3		15.8		16.6		16.1		14.7		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		13.5		4.7		8		12.3		17.1		20.5		22.2		23.8		19.9		14.7		9.4		5.4		4

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		6.1		7.6		8.9		9.5		9.3		8		6.6		4.7		3.1		2.4

Average Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		15		8		12.3		15.4		18		18.8		19.2		21.2		19.9		17.1		13.1		9.2		7.3

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		14.8		7.2		10.9		13.6		17.6		19.5		20.9		24		21		16.5		12.3		8		6.5

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		13.5		4.7		8		12.3		17.1		20.5		22.2		23.8		19.9		14.7		9.4		5.4		4

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		3.1		4.6		6.7		7.7		9.1		9.7		9.9		8.4		7.4		5		3.5		2.7

Maximum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		17.4		9.6		14.5		18.4		20.6		21.6		21.7		23.6		22.2		21.4		14.8		10.8		8.8

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		18		8.9		13.3		17.5		21.6		24.4		25.7		27.5		24.2		21.6		14.3		9.5		8.1

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		6.3		10.1		14.1		16.7		18.9		18.6		18.1		11.6		8.3		4.9		3.2

Minimum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		5.8		2.5		3.5		5.7		7.5		8.8		9.4		9.1		8		6		4.3		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		6.7		9.4		12.8		14.4		15.3		16.4		16.6		17.9		13		11.4		7.9		5.6

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		5.8		7.8		9.8		11.8		12.9		15.3		15.5		17.8		11.2		10.5		6.8		4.7