LETHA, IDAHO

Average Temperature

Years on Record: 105

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		10.8		-1.3		2.1		6.4		10.5		14.8		19		23.3		22.2		17.2		11.1		4.3		-0.3

Average High Temperature

Years on Record: 105

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		18.4		3.2		7.4		13.2		18.3		23.3		28.1		33.6		32.5		26.8		19.4		10.2		4.3

Average Low Temperature

Years on Record: 105

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		3.2		-5.8		-3.2		-0.3		2.7		6.3		9.9		13.1		11.9		7.6		2.8		-1.7		-4.9

Highest Recorded Temperature

Years on Record: 105

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		43.9		17.2		21.7		27.8		34.4		37.8		43.3		43.9		42.8		39.4		35		24.4		23.3

Lowest Recorded Temperature

Years on Record: 105

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-32.8		-32.8		-26.7		-14.4		-11.1		-5		-1.1		1.7		-0.6		-6.1		-11.1		-25		-32.8

Average Number of Days Above 100F/38C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		3.6		---		---		---		---		---		0.2		2.2		1.2		---		---		---		---

Average Number of Days Above 90F/32C

Years on Record: 105

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		55.1		---		---		---		0.1		1.8		7.4		21.8		19.1		4.8		0.1		---		---

Average Number of Days Above 80F/26C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		96.4		---		---		---		1.1		7.2		16.1		27.9		27.6		14.2		2.2		---		---

Average Number of Days Above 70F/21C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		145.4		---		---		1.1		7.1		16.9		25.9		30.7		30.6		23.9		8.9		0.2		---

Average Number of Days Above 60F/15C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		200.3		---		0.9		8.4		17.4		27.1		29.6		31		31		29.3		22.1		3.4		0.1

Average Number of Days Above 50F/10C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		258.4		1.8		8.1		22.8		27.8		30.9		30		31		31		30		29.8		12.7		2.6

Average Number of Days Above 40F/4C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		316.1		12.8		21		30.1		29.9		31		30		31		31		30		31		25.8		12.6

Average Number of Days Below 70F/21C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		364.3		31		28		31		30		31		30		30.5		30.8		30		31		30		31

Average Number of Days Below 60F/15C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		344		31		28		31		30		30.7		27.5		21.1		23.4		29.2		31		30		31

Average Number of Days Below 50F/10C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		277.5		31		28		30.8		29.6		24.6		13.9		4.1		5.3		19.4		30		29.8		30.9

Average Number of Days Below 40F/4C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		201.5		30.6		27.4		28		21.3		10.7		1.2		0.1		0.1		4.7		19.7		27.4		30.2

Average Number of Days Below 32F/0C

Years on Record: 105

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		134		27.1		22.4		18		8.9		2.3		0.1		---		---		0.9		8.4		19.8		26.1

Average Number of Days Below 20F/-6C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		31.5		10.5		5.7		1		---		---		---		---		---		---		0.2		3.4		10.7

Average Number of Days Below 10F/-12C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		8.7		4		1.3		---		---		---		---		---		---		---		---		0.5		3

Average Number of Days Below 0F/-17C

Years on Record: 105

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		2.9		1.4		0.4		---		---		---		---		---		---		---		---		0.1		1

Average Precipitation

Years on Record: 105

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		321		41		33		32		28		31		24		6		7		16		23		38		42

Average Number of Days With Precipitation

Years on Record: 105

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		71		9		8		8		7		6		5		1		2		3		5		8		9

Most Reported Precipitation in a Month

Years on Record: 105

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		139		139		97		107		92		119		80		59		76		126		91		100		133

Least Reported Precipitation in a Month

Years on Record: 105

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		---		5		1		1		---		---		---		---		---		---		---		---		---

Most Precipitation Reported in a Day

Years on Record: 105

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		62.7		34.3		40.6		25.4		32.8		40.1		30.5		31.2		26.2		62.7		27.9		25.6		44.5

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		44.2		6		4.6		5.2		4.3		4.2		2.7		1		0.9		1.7		2.8		5.3		5.5

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

Years on Record: 105

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		42		5		4		5		4		4		3		1		1		2		3		5		5

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

Years on Record: 105

		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		4.4		0.4		0.3		0.5		0.3		0.5		0.3		0.1		0.1		0.2		0.2		0.6		0.9

Average Snowfall

Years on Record: 105

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		32.5		13.2		6.9		1.3		0.5		---		---		---		---		---		0.2		2.3		8.1

Average Snow Cover

Years on Record: 51

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

Most Snow Reported in a Month

Years on Record: 105

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		86.4		66		86.4		22.9		7.6		---		---		---		---		---		15.2		43.2		47

Heating Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		5830		1086		834		668		465		255		81		12		15		128		418		783		1083

Cooling Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		722		---		---		---		1		27		102		278		246		64		3		---		---

Growing Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		2776		---		1		17		83		257		472		731		696		390		119		8		1

Average Length of Day

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hours		12.7		9.9		11		12.5		14		15.3		16		15.6		14.4		12.9		11.4		10.2		9.5

Average Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		15.6		6.4		9.8		14.2		18.3		21.4		25		26.7		23.4		17.9		11.8		6.7		5.5

Average Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		4.6		2.2		3.1		4.6		6.4		7.7		7.7		6.4		5.5		4.4		3.4		2.6		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		18.2		13		16		18.6		19.3		19.7		21.6		23.7		23.5		21.7		18.2		12.3		11.3

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		21.2		13.5		17		19.6		20.8		22.2		27.5		32.3		30.1		25.6		19.9		12.7		12.8

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		15.6		6.4		9.8		14.2		18.3		21.4		25		26.7		23.4		17.9		11.8		6.7		5.5

Maximum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		5.3		2.4		3.5		5.1		6.8		8.3		8.8		7.6		6.4		5.7		3.8		2.7		2.1

Maximum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		21.7		16.7		19.1		21.3		22.8		23.8		25.6		26		26.2		25.8		23.6		16.9		13.4

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		27.5		18.4		21.7		23.7		27.5		31.4		38		38.3		36		32.8		28.1		18.6		15.9

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		13.2		5.2		7.6		12.3		16.3		18.4		20.6		23.8		21.1		13.6		10.2		5.2		4.6

Minimum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		3.8		1.9		2.7		4.1		5.5		6.3		5.8		5.3		4.3		3.2		2.4		2.1		1.8

Minimum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		14.8		9.5		11.2		15.6		16.9		16.9		17.9		21.2		21.1		15.6		14.8		8.5		8.5

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		15.3		9		10.4		14.9		16.5		16.3		18.7		25.9		24.8		15.2		15.1		7.7		8.9