FORT KNOX, KENTUCKY

Average Temperature

Years on Record: 55

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		56		33		36		45		57		65		74		77		76		69		58		46		37

Average High Temperature

Years on Record: 55

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		66		41		45		54		67		75		83		87		86		79		69		55		45

Average Low Temperature

Years on Record: 55

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		47		25		28		36		46		55		64		68		66		59		48		38		29

Highest Recorded Temperature

Years on Record: 55

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		104		77		78		85		93		96		104		104		102		102		91		83		77

Lowest Recorded Temperature

Years on Record: 55

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		-23		-23		-17		-3		22		30		39		50		46		34		21		-2		-14

Average Number of Days Above 80F/26C

Years on Record: 55

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		115		---		1		4		12		22		28		26		16		5		1		---		---

Average Number of Days Below 32F/0C

Years on Record: 55

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		88		23		19		13		2		---		---		---		---		---		1		10		20

Average Number of Days Below 10F/-12C

Years on Record: 55

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		8		4		2		1		---		---		---		---		---		---		---		---		1

Average Precipitation

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in.		46.7		3.2		3.6		4.1		4.1		5.2		4.2		4.4		3.3		3.1		3.4		3.8		4.3

Average Precipitable Water

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in.		0.9		0.5		0.5		0.6		0.7		1		1.3		1.5		1.4		1.1		0.8		0.6		0.5

Average Number of Rainy Days

Years on Record: 55

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		120		11		10		12		12		11		10		10		8		7		8		10		11

Average Number of Days With Thunderstorms

Years on Record: 45

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		50		1		1		3		5		7		8		9		7		4		2		2		1

Most Rain Reported in a Day

Years on Record: 55

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in.		4.9		3.2		4.9		4.8		4.2		3.9		3.7		3.6		3.6		4.4		3.7		3.2		4.5

Most Rain Reported in a Month

Years on Record: 55

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in.		72		14.7		13.2		12.6		10.9		11.7		10.5		9.6		9.5		12.4		7.2		8.9		10.8

Least Rain Reported in a Month

Years on Record: 55

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in.		29.5		0.4		0.4		1.1		1		0.8		0.5		0.6		0.1		0.1		0.1		0.7		0.8

Average Snowfall

Years on Record: 48

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in.		15.5		5.4		4		2.7		0.1		---		---		---		---		---		---		1.2		1.9

Average Number of Days With Snow

Years on Record: 48

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		13		4		3		2		1		---		---		---		---		---		---		1		2

Deepest Snow Cover Reported

Years on Record: 48

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in.		17		17		9		10		5		---		---		---		---		---		---		15		5

Most Snow Reported in a Day

Years on Record: 48

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in.		55		9.2		9		0.9		---		---		---		---		---		2.2		14.3		4.8		14.6

Most Snow Reported in a Month

Years on Record: 48

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in.		42.9		24.5		13		19.1		1		---		---		---		---		---		2.2		17.5		11.1

Average Relative Humidity

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		72.3		75.4		70.4		66.3		64.7		72.9		75.6		76.2		74.7		73.5		71.7		71.1		76.3

Average Morning Relative Humidity

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		78.7		73.4		73.6		75.3		72.9		80.1		80.9		85.1		85.5		84.2		82.2		76.4		74.7

Average Evening Relative Humidity

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		58.1		63.6		60.8		57.6		50.3		56.7		57		59.4		57.5		57.7		54.7		60.1		62.1

Average Dew Point

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		45		24		27		35		42		53		61		67		64		58		46		36		27

Average Wet Bulb

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		50		31		33		41		49		58		65		70		68		62		51		42		33

Heating Degree Days

Years on Record: 49

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		4330		943		769		602		266		84		7		---		1		41		230		541		846

Cooling Degree Days

Years on Record: 49

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		1411		---		---		3		34		114		285		393		357		183		39		3		---

Growing Degree Days

Years on Record: 55

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		3856		---		---		---		210		465		720		837		806		570		248		---		---

Average Length of Day

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hours		12.7		10.4		11.3		12.4		13.7		14.7		15.3		15		14		12.8		11.6		10.6		10.1

Average Number of Days With Fog

Years on Record: 45

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		170		15		13		13		10		13		14		17		19		16		14		13		13

Average Possibility of Clouds

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		56.2		68.4		64.4		62.5		55.3		58		53.9		46.7		43.6		44.4		48.7		61.1		67.7

Average Total Sky Cover

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		62.2		73.4		72		67.4		63.2		65.1		61.9		57.3		50.9		48.6		52.1		62.2		71.9

Average Opaque Sky Cover

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		56.2		69		64.8		61.8		57.2		58.8		53.4		50		45.7		43		47		57.6		67

Average 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		1.9		2.7		3.6		4.7		5.2		5.9		5.9		5.3		4.7		3.4		2.2		1.7

Average Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		1.6		0.9		1.2		1.6		2		2.4		2.5		2.4		2.1		1.6		1.2		0.9		0.8

Average Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		4.2		2.9		3.4		4.2		4.7		4.7		5.2		5.2		5.1		5.2		4.5		3.2		2.6

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		4.1		2.8		3.3		3.8		4.3		4.3		5.2		5.3		5		5.3		4.5		3.2		2.5

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		3.9		1.9		2.7		3.6		4.7		5.2		5.9		5.9		5.3		4.7		3.4		2.2		1.7

Maximum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		1.7		0.9		1.2		1.6		2.1		2.4		2.5		2.4		2.2		1.8		1.3		1		0.8

Maximum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		5.1		3.4		4.2		5.2		5.4		5.5		6		5.9		5.6		6.2		5.2		4.5		3.6

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		5.5		3.5		4.5		5.4		5.6		5.8		7.2		6.9		6		7		5.6		5		4

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		3.2		1.6		1.9		2.8		3.8		4.2		5		5.1		4.6		3.8		2.6		1.5		1.3

Minimum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		1.5		0.9		1.1		1.5		1.9		2.2		2.2		2.2		2		1.4		1.1		0.8		0.7

Minimum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		3.3		2.2		2.3		3.1		3.8		3.8		4.4		4.6		4.4		4.1		3.2		1.9		1.8

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		2.7		1.9		1.8		2.2		2.9		2.8		3.7		4.1		3.8		3.6		2.7		1.5		1.5