SWIFTCURRENT LAKE, MONTANA

Average Temperature

Years on Record: 14

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		3.5		-10.7		-3.3		-1.7		3.2		8.1		11.9		14.9		14.2		10.2		3.9		-1.8		-6.9

Average High Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		6.8		-3.8		-0.3		2.6		7.7		12.1		19.7		21.1		17.2		11.7		4.1		-8.3		-2.4

Average Low Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-4.1		-14.3		-9.8		-6.3		-2.9		1.2		3.3		3.9		2.2		1.4		-3.8		-12		-11.8

Highest Recorded Temperature

Years on Record: 14

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		33.3		9.4		11.1		13.3		22.2		23.3		29.4		30		33.3		31.7		22.8		13.3		12.2

Lowest Recorded Temperature

Years on Record: 14

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-45.6		-45.6		-30		-31.1		-20.6		-7.8		-5		-0.6		-2.8		-6.1		-18.9		-31.7		-42.8

Average Number of Days Above 90F/32C

Years on Record: 14

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

Average Number of Days Below 32F/0C

Years on Record: 14

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		184.2		27.7		25.2		26.4		17.6		11		2		0.2		1.2		5.2		14		24.7		28.9

Average Number of Days Below 0F/-17C

Years on Record: 14

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		32.7		13.4		4.4		3.9		0.8		---		---		---		---		---		0.2		2		8

Average Precipitation

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		1036		139		69		93		46		91		124		46		53		76		84		79		136

Average Number of Days With Precipitation

Years on Record: 14

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		133		15		9		13		9		8		15		9		7		12		10		11		15

Most Reported Precipitation in a Month

Years on Record: 14

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		274		212		171		172		69		139		185		75		98		139		202		90		274

Least Reported Precipitation in a Month

Years on Record: 14

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		7		46		33		28		21		51		79		25		7		25		30		57		70

Most Precipitation Reported in a Day

Years on Record: 14

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		74.2		40.6		36.1		74.2		27.4		63.8		68.8		23.4		34.5		40.1		40.6		27.4		50.8

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

Years on Record: 14

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		94		11		7		8		5		6		11		6		5		8		8		8		11

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

Years on Record: 14

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		28		4		2		2		1		3		3		1		1		2		3		2		4

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

Years on Record: 14

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

Average Snowfall

Years on Record: 14

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		534.7		160		53.6		93		53.3		12.7		3.8		---		---		3.8		22.4		48		84.1

Most Snow Reported in a Month

Years on Record: 14

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		236.7		236.7		123.2		168.9		87.6		33		15.2		---		---		15.2		23.6		61.7		118.6

Heating Degree Days

Years on Record: 14

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		3612.8		728.3		457.2		449.4		287.2		155.6		66.1		13.9		26.1		103.9		277.8		436.7		610.6

Cooling Degree Days

Years on Record: 14

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		17.2		---		---		---		---		---		3.9		7.2		5.6		0.6		---		---		---

Growing Degree Days

Years on Record: 14

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		342.5		---		---		---		---		---		56.7		151.6		129.2		5		---		---		---

Average Length of Day

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hours		12.8		9.4		10.8		12.5		14.3		16		16.8		16.3		14.8		13.1		11.3		9.7		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		15.6		18		18.5		18.5		20.7		19.5		16.4		12.6		9.1		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		10.5		8.9

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		12.6		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