HUNTSVILLE - REDSTONE ARSENAL, ALABAMA

Average Temperature

Years on Record: 21

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		15.2		4.1		5.8		9.6		15.6		19.9		23.4		25.3		24.9		22.1		15.7		9.6		5.8

Average High Temperature

Years on Record: 21

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		21.8		10.1		11.9		16.2		22.4		26.9		30.1		31.7		31.7		29.1		23.4		16.7		11.9

Average Low Temperature

Years on Record: 21

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		8.4		-1.9		-0.4		3		8.6		12.8		16.7		18.9		18.2		15.1		8.1		2.5		-0.3

Highest Recorded Temperature

Years on Record: 21

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		38.9		26.1		26.1		28.9		31.7		35		36.7		38.9		37.8		38.9		33.3		30		24.4

Lowest Recorded Temperature

Years on Record: 21

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-24.4		-24.4		-20.6		-12.2		-3.9		-0.6		5		10		10		0.6		-5		-11.1		-19.4

Average Number of Days Above 90F/32C

Years on Record: 21

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		49.4		---		---		---		---		2		8.2		16.1		15.5		7.3		0.3		---		---

Average Number of Days Below 32F/0C

Years on Record: 21

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		81.5		20.4		15.9		11.8		1.4		0.1		---		---		---		---		2.2		11.8		18

Average Number of Days Below 0F/-17C

Years on Record: 21

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		0.6		0.4		0.2		---		---		---		---		---		---		---		---		---		0.1

Average Precipitation

Years on Record: 21

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		1327		135		132		141		121		113		90		120		77		83		68		103		145

Average Number of Days With Precipitation

Years on Record: 21

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		119		12		11		12		9		10		9		11		9		8		7		10		12

Most Precipitation Reported in a Day

Years on Record: 21

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm.		104.1		90.7		71.1		99.1		71.4		100.3		57.1		78.7		71.1		69.8		59.2		80		104.1

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

Years on Record: 21

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		81		8		8		8		7		7		6		8		5		5		5		6		8

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

Years on Record: 21

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		37		4		4		4		4		3		2		3		2		2		2		3		4

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

Years on Record: 21

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		16		2		1		2		2		1		1		2		1		1		1		1		2

Most Rain Reported in a Month

Years on Record: 21

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		1654		289		250		352		265		266		176		232		157		175		129		297		326

Least Rain Reported in a Month

Years on Record: 21

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		987		42		39		51		48		34		25		55		11		14		---		18		23

Average Snowfall

Years on Record: 21

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm.		5.6		2.5		2		0.5		---		---		---		---		---		---		---		0.2		---

Most Snow Reported in a Month

Years on Record: 21

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm.		29		20.3		27.9		6.3		---		---		---		---		---		---		---		6.3		1

Heating Degree Days

Years on Record: 21

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		2194.5		441.8		355.5		271.3		84.2		---		---		---		---		---		80.1		262.5		388.4

Cooling Degree Days

Years on Record: 21

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		734.3		---		---		---		---		48.2		152.5		216.2		204.9		112.5		---		---		---

Growing Degree Days

Years on Record: 21

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		2353.5		---		---		---		165.8		306.6		402.5		474.5		463.3		362.5		178.3		---		---

Average Length of Day

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hours		12.6		10.6		11.4		12.4		13.5		14.5		14.9		14.7		13.8		12.8		11.7		10.8		10.3

Average Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		14.9		8		10.6		14.4		17.9		19.9		20.9		20.8		19		17		13.5		9.4		7.4

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		3.5		4.5		5.9		7.3		8.4		8.8		8.5		7.7		6.1		4.6		3.6		3.1

Average Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		16		11.4		13.1		16.3		17.9		18.2		18.4		18.6		18.3		18.4		17.2		13.1		11.1

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		15.6		11.3		12.6		15.2		16.8		17.3		18		18.4		17.5		18.4		17.6		13.5		11.1

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		14.9		8		10.6		14.4		17.9		19.9		20.9		20.8		19		17		13.5		9.4		7.4

Maximum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		6.3		3.5		4.6		6.1		7.6		8.7		9.1		8.9		8		6.6		5.1		3.8		3.2

Maximum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		19.6		15.3		16.5		21.6		20.2		21.6		21.8		21.3		20.9		21.6		21.7		17.2		14.7

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		21.7		17.1		17.5		23.7		20.8		24.3		25.6		24.1		22.6		23.8		24.6		19.7		16.4

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		12.1		6.5		7.6		11.4		14.8		16.7		16.6		17.8		16.3		14.1		9.8		6.9		6.2

Minimum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		5.4		3.1		4.2		4.9		7		7.6		7.9		7.8		7.1		5.4		3.7		3.1		2.8

Minimum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		12.5		8.6		8.7		12.3		14.6		15.4		14.8		16		15.7		14.9		11.4		8.8		8.6

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		10.1		7.5		6.5		9.4		11.3		12.1		11.1		13.2		12.9		12.7		9.2		7.3		7.7