SWAN FALLS DAM, IDAHO

Average Temperature

Years on Record: 76

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		55.2		32.7		38.9		46.2		53.9		62.8		70.6		79.8		77.7		67.7		55.8		42.5		34.1

Average High Temperature

Years on Record: 76

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		67.9		40.5		48.6		58.1		67.1		76.8		85.2		95.9		94.1		83.8		69.8		52.6		42

Average Low Temperature

Years on Record: 76

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		42.6		24.8		29.3		34.4		40.7		48.8		56		63.7		61.2		51.7		41.9		32.6		26.2

Highest Recorded Temperature

Years on Record: 76

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		115		67		84		85		96		104		110		113		115		108		98		79		69

Lowest Recorded Temperature

Years on Record: 76

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		-21		-15		-13		13		13		28		29		42		41		29		---		3		-21

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		11.6		---		---		---		---		0.1		1.1		6		4.2		0.2		---		---		---

Average Number of Days Above 90F/32C

Years on Record: 76

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		73.9		---		---		---		0.2		3.8		11		25.6		23.6		9.5		0.3		---		---

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		111.7		---		---		0.1		2.8		9.6		19.4		29.1		29.1		18		3.5		---		---

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		159.5		---		---		2		9.4		19.6		27.6		30.9		30.9		26.8		11.9		0.3		---

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		213.8		0.1		1.7		12.2		20.6		28.9		29.9		31		31		29.6		24.1		4.6		0.2

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		269		2.6		10.5		25.5		29		30.9		30		31		31		30		30		15		3.4

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		325.7		15.6		22.5		30.4		30		31		30		31		31		30		31		27		16.2

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		358.3		31		28		31		30		31		29.4		26.6		29.4		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		309.8		31		28		31		30		29.3		21		8.6		12.2		26.9		30.9		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		243.7		31		28		30.8		28.1		17.4		5.5		0.9		1.5		11.9		27.8		29.8		31

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		170.8		30.6		27.1		24.4		13.7		3.5		0.4		0.1		---		1.4		13.2		26		30.4

Average Number of Days Below 32F/0C

Years on Record: 76

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		98.5		24.6		18.6		11.5		2.7		0.2		---		---		---		0.1		2.4		14.7		23.7

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		22.7		7.7		3.6		0.3		---		---		---		---		---		---		---		2.2		8.7

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		5.6		1.9		0.9		---		---		---		---		---		---		---		---		0.3		2.4

Average Number of Days Below 0F/-17C

Years on Record: 76

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		1.2		0.7		0.1		---		---		---		---		---		---		---		---		---		0.4

Average Precipitation

Years on Record: 76

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		7.9		0.8		0.6		0.8		0.9		1.1		0.8		0.2		0.2		0.4		0.5		0.8		0.7

Average Number of Days With Precipitation

Years on Record: 76

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		70		8		6		8		7		7		6		2		2		3		5		8		8

Most Reported Precipitation in a Month

Years on Record: 76

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		3.5		2.5		2.2		2.3		3.3		3.5		3.2		1.4		2.5		2.9		1.6		2.2		2.5

Least Reported Precipitation in a Month

Years on Record: 76

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		---		---		---		---		---		---		---		---		---		---		---		0.1		---

Most Precipitation Reported in a Day

Years on Record: 76

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		1.6		0.7		1		0.9		1.4		1.4		1.6		1		1.1		1.5		0.7		1		1.4

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		28		2.9		2.2		3.3		3.3		3.8		2.2		0.8		0.5		1.1		1.7		3.3		2.9

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

Years on Record: 76

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		27		3		2		3		3		3		2		1		1		1		2		3		3

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		1.5		0.1		---		0.3		0.2		0.4		0.1		0.1		---		0.1		---		0.1		0.1

Average Snowfall

Years on Record: 76

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		4		1.9		0.6		0.2		---		---		---		---		---		---		---		0.3		1

Average Number of Days With Snow

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		1.8		0.4		0.2		---		---		---		---		---		---		---		---		0.2		1

Most Snow Reported in a Month

Years on Record: 76

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		10		9.7		6.5		3.5		---		---		---		---		---		---		0.8		6.4		10

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		1.1		0.3		0.2		---		---		---		---		---		---		---		---		0.1		0.5

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		0.3		0.2		---		---		---		---		---		---		---		---		---		---		0.1

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		0.1		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		1.1		0.5		0.1		---		---		---		---		---		---		---		---		0.3		0.2

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		0.7		0.4		---		---		---		---		---		---		---		---		---		0.1		0.2

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		0.4		0.2		---		---		---		---		---		---		---		---		---		---		0.2

Heating Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		5088		1017		773		577		364		162		35		2		4		66		338		723		1029

Cooling Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		1172		---		---		---		5		60		191		420		368		118		9		---		---

Growing Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		3556		---		2		36		139		367		606		883		829		503		177		12		---

Average Length of Day

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hours		12.8		10		11.1		12.5		14		15.3		15.9		15.6		14.4		12.9		11.5		10.2		9.6

Average Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		4.5		1.8		2.8		4.1		5.4		6.4		7.3		7.5		6.6		5.1		3.5		2		1.6

Average Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		1.3		0.7		0.9		1.3		1.7		2		2		1.8		1.5		1.2		0.9		0.7		0.6

Average Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		5.2		3.5		4.4		5.3		5.7		5.9		6.3		6.6		6.6		6.2		5.3		3.5		3.3

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		6.1		3.6		4.7		5.8		6.4		7		8.3		9		8.4		7.3		5.9		3.7		3.5

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		4.5		1.8		2.8		4.1		5.4		6.4		7.3		7.5		6.6		5.1		3.5		2		1.6

Maximum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		1.5		0.7		1		1.5		1.9		2.3		2.4		2.1		1.7		1.6		1.1		0.8		0.6

Maximum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		6.1		4.6		5.3		6.2		6.5		6.8		7		7.3		7.1		7.2		6.4		4.7		4.3

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		7.7		5.1		5.9		7.2		8		9		10.1		10.7		9.6		9.1		7.5		5.3		4.7

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		3.9		1.6		2.3		3.4		4.8		5.4		6.1		6.8		6.2		4.1		3		1.5		1.4

Minimum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		1.1		0.6		0.8		1.1		1.5		1.7		1.7		1.4		1.3		0.9		0.7		0.6		0.5

Minimum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		4.3		3		3.4		4.1		5		5		5.3		6.1		6.1		4.6		4.3		2.3		2.7

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		4.6		3		3.3		3.9		5		5		5.8		7.6		7.4		4.7		4.4		2.1		2.7