MERIWETHER, MONTANA

Average Temperature

Years on Record: 96

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		3		-7		-6		-2		3		8		12		16		15		10		6		-1		-5

Average High Temperature

Years on Record: 96

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		11		-2		---		3		10		15		20		25		24		18		12		4		---

Average Low Temperature

Years on Record: 96

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-2.4		-13.3		-11.6		-8.4		-2.6		1.9		5.4		7.8		6.9		3.1		-0.6		-6.7		-10.4

Highest Recorded Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		34.7		6.1		9		11.8		19.9		26		34.7		32.8		33.9		27.4		17.9		13.1		5.6

Lowest Recorded Temperature

Years on Record: 96

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-48.9		-48.9		-43.3		-38.9		-26.1		-17.2		-17.8		-16.1		-7.2		-17.8		-27.2		-39.4		-43.9

Average Number of Days Above 90F/32C

Years on Record: 96

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		3.4		---		---		---		---		0.1		0.4		1.8		1		0.1		---		---		---

Average Number of Days Below 32F/0C

Years on Record: 96

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		194.4		28.5		26.1		27.7		21.6		10.5		2		0.3		0.8		8.1		16.8		24.4		27.8

Average Number of Days Below 0F/-17C

Years on Record: 96

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		34.6		10.4		7.7		4.7		0.5		---		---		---		---		---		0.3		3.7		7.3

Average Precipitation

Years on Record: 96

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		370		20		10		20		20		50		70		30		30		30		20		20		10

Average Number of Days With Precipitation

Years on Record: 96

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		70		6		6		6		6		7		8		5		5		6		5		5		5

Most Reported Precipitation in a Month

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		227		28		24		31		94		171		171		227		112		129		79		19		23

Least Reported Precipitation in a Month

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		---		---		---		---		2		6		9		---		---		---		---		---		---

Most Precipitation Reported in a Day

Years on Record: 96

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		149.9		64.8		25.9		31.2		48		86.4		149.9		77.2		53.3		73.7		41.4		44.5		30.5

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

Years on Record: 96

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

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

Years on Record: 96

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

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

Years on Record: 96

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

Average Snowfall

Years on Record: 96

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		151.1		24.1		21.1		22.6		16.8		5.8		1		0.2		0.2		6.6		10.7		18.8		23.1

Average Snow Cover

Years on Record: 96

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

Most Snow Reported in a Month

Years on Record: 96

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		115.6		94		76.2		115.6		83.8		53.3		27.9		10.2		5.1		91.4		82.5		96		99.1

Heating Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		4541.7		853.3		653.3		547.8		328.3		167.2		62.8		23.3		40		151.7		336.1		585.6		792.2

Cooling Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		328.3		---		---		---		---		12.2		62.8		116.1		114.4		22.8		---		---		---

Growing Degree Days

Years on Record: 96

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		445		---		---		---		---		---		66.7		189.4		172.2		16.7		---		---		---

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		15.9		16.8		16.3		14.8		13.1		11.3		9.8		9

Average Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		13.1		4.4		7.7		12.1		17		20.1		21.4		23.3		19.5		14		9		5.2		3.8

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		2.7		4.1		6		7.6		9		9.6		9.3		8		6.4		4.6		3		2.3

Average Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		14.7		7.9		12.2		15.4		18		18.5		18.5		20.7		19.5		16.4		12.6		9		7.2

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		14.4		7.1		10.7		13.6		17.7		19		19.7		23.5		20.4		15.7		11.9		7.8		6.4

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		13.1		4.4		7.7		12.1		17		20.1		21.4		23.3		19.5		14		9		5.2		3.8

Maximum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		6.4		3		4.4		6.7		7.6		9.1		9.8		9.9		8.3		7.3		5		3.3		2.6

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		9.5		13.5		18.9		20.7		20.4		21.6		23.3		21.9		21		14.4		10.4		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		17.7		8.8		12		18		21.8		22.6		25.5		27.4		24		21.2		13.9		9.1		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		3.9		6.7		10.2		14.1		16.6		18.6		18.5		16.9		11.2		7.8		4.5		3.1

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		3.7		5.7		7.5		8.9		9.5		9.1		8		5.9		4.1		2.7		2

Minimum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		12.1		6.8		10.4		12.5		14.5		15.2		16.1		16.4		16.6		12.7		10.7		7.5		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		10.6		5.9		8.8		10.1		12.1		12.8		14.7		15.3		15.7		10.9		9.8		6.4		4.7