TONGUE RIVER, MONTANA

Average Temperature

Years on Record: 101

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		5.9		-10.8		-8.3		1.5		6.6		10.3		15.9		21.4		18.9		14.6		8.3		0.2		-7.1

Average High Temperature

Years on Record: 101

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		15.5		-2.8		-0.2		9.7		14.7		18.6		24.7		31.8		30.2		26.2		19.1		11.1		3.2

Average Low Temperature

Years on Record: 101

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-3.6		-18.9		-16.3		-6.8		-1.6		2.1		7.3		11		7.7		3		-2.4		-10.7		-17.4

Highest Recorded Temperature

Years on Record: 101

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		38.9		13.3		17.8		28.3		30		32.2		36.7		38.3		38.3		38.9		31.1		23.3		25

Lowest Recorded Temperature

Years on Record: 101

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-44.4		-42.2		-44.4		-32.2		-14.4		-4.4		0.6		-0.6		---		-6.7		-15		-27.8		-34.4

Average Number of Days Above 90F/32C

Years on Record: 101

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		36.7		---		---		---		---		0.4		1.2		17		14.4		3.7		---		---		---

Average Number of Days Below 32F/0C

Years on Record: 101

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		208.6		30.9		27.3		27		20.5		9.2		---		0.2		0.8		6		25.8		30		31

Average Number of Days Below 0F/-17C

Years on Record: 101

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		53		18		11.6		2.9		---		---		---		---		---		---		---		3.4		17.1

Average Precipitation

Years on Record: 101

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		304		12		8		16		31		53		57		28		22		28		22		15		12

Average Number of Days With Precipitation

Years on Record: 101

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		64		5		4		6		7		8		8		5		4		5		4		4		4

Most Reported Precipitation in a Month

Years on Record: 101

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		194		38		29		38		81		181		194		101		91		84		76		71		65

Least Reported Precipitation in a Month

Years on Record: 101

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

Most Precipitation Reported in a Day

Years on Record: 101

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		79.5		17.8		11.4		14.7		38.1		54.6		79.5		50.8		53.3		50.8		46.5		27.9		21.6

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		32.9		1.2		1.5		2.3		3.9		4.5		4.3		3.5		2.5		3.2		2.6		1.9		1.5

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

Years on Record: 101

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		33		2		1		2		4		5		5		3		2		3		2		2		2

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

Years on Record: 101

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		5		---		---		---		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		4.2		0.1		---		0.1		0.3		0.8		0.8		1		0.1		0.5		0.3		0.1		0.1

Average Snowfall

Years on Record: 101

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		47.8		10.2		7.1		7.9		2.8		1		---		---		---		1.5		1		5.8		10.4

Average Number of Days With Snow

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		3.3		0.9		0.4		0.4		0.1		---		---		---		---		0.1		0.1		0.1		1.2

Most Snow Reported in a Month

Years on Record: 101

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		43.2		43.2		33.3		38.9		19.1		35.6		2.5		---		---		25.4		22.9		31.8		38.1

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		2.6		0.5		0.3		0.4		0.1		---		---		---		---		0.1		0.1		0.1		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		1		0.2		0.1		0.2		---		---		---		---		---		---		---		---		0.5

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		0.2		---		---		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		3892.2		651.7		514.4		450		322.2		198.3		91.1		37.2		43.3		140		300		500.6		643.3

Cooling Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		150		---		---		---		---		1.1		16.7		61.7		60.6		10		---		---		---

Growing Degree Days

Years on Record: 101

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		957.3		---		---		---		---		10.3		178.3		353.1		277.3		138.3		---		---		---

Average Length of Day

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hours		12.8		9.8		11		12.5		14.1		15.5		16.2		15.8		14.5		13		11.4		10.1		9.4

Average Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		14.4		5.8		9		13.1		17.2		21.2		23.3		24.1		21.1		15.8		10.6		6.5		4.9

Average Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		4.9		2.2		3.1		4.7		6.5		7.7		8.2		7.4		6.3		5		3.6		2.4		1.9

Average Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		16.7		11.8		14.7		16.9		18.1		19.6		20.2		21.4		21.2		18.9		15.8		12.3		10

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		18.6		12.1		15.4		17.4		18.9		22.1		24.1		26.9		25.2		20.9		16.8		12.9		11.2

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		14.4		5.8		9		13.1		17.2		21.2		23.3		24.1		21.1		15.8		10.6		6.5		4.9

Maximum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		5.4		2.3		3.4		5.1		6.9		8.3		8.9		8.5		6.8		5.6		3.8		2.6		1.9

Maximum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		19.7		13.6		17.7		20.5		23		23.6		22.8		24.1		22.8		22.1		18.6		15.1		12.7

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		24.1		14.3		20.4		23.3		28.2		31.3		30.6		33.4		28.6		26.4		20.6		16.8		15

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		12.2		5.3		7.2		10.6		14.6		17.4		19.6		19.8		19.4		13		9.2		5.7		4

Minimum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		4.2		2		2.7		4.1		5.3		6.3		7.2		6.3		5.8		4.3		3.2		2.2		1.7

Minimum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		13.7		10.6		10.8		13.2		15		15.9		17		17.7		19.4		14.9		13.1		9.8		7.3

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		13.4		10.4		9.9		11.5		13.7		14.8		17		18.4		21.5		14.3		12.8		9.7		7.3