HUNTSVILLE, ALABAMA

Average Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		16.7		5.3		7.6		11.9		16.6		21.3		25.4		27		26.7		23.2		17.1		11.5		6.6

Average High Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		22.7		10.7		13.3		18.3		23.1		27.4		31.2		32.6		32.7		29.4		23.7		17.6		11.9

Average Low Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		10.8		-0.1		1.9		5.7		10		15.2		19.5		21.3		20.8		16.9		10.6		5.4		1.3

Highest Recorded Temperature

Years on Record: 45

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		40.6		25		28.3		31.1		32.8		35.6		41.1		40.6		40.6		38.3		32.8		28.9		26.1

Lowest Recorded Temperature

Years on Record: 45

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-23.9		-23.9		-17.2		-14.4		-3.9		2.2		7.2		12.2		10.6		3.3		-1.7		-9.4		-19.4

Average Heat Index Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		16.3		4.8		7.1		11.5		16.2		20.9		25.2		27.1		26.6		22.6		16.3		10.9		6.2

Average Wind Chill Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		15.3		2.3		5.2		10.3		15.8		20.8		24.6		26		25.7		22.3		16.1		9.9		4.2

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		2.5		---		---		---		---		---		0.1		0.6		1.6		0.2		---		---		---

Average Number of Days Above 90F/32C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		58.5		---		---		---		0.4		2.9		12.6		17.8		18		6.7		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		151.3		---		0.1		2		8.2		19.2		27.5		30.5		30.1		23.1		9.1		1.3		0.1

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		218.1		1.2		3.1		10.8		20.4		28.9		29.9		31		31		29.3		22.3		8.7		1.7

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		277.9		7.6		10.9		20.7		27.3		31		30		31		31		30		29.6		19.8		9.2

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		324.5		17.1		19.3		28.2		29.7		31		30		31		31		30		30.9		27.1		19.3

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		353.9		26		25.8		30.6		30		31		30		31		31		30		31		29.9		27.8

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		314.2		31		28		30.9		30		29.9		20.5		11.4		15.3		25.6		30.7		29.9		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		228.7		30.8		27.9		30.2		25.7		15.1		2.9		0.1		1.2		10.3		25		29		30.5

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		165.8		29.1		25.6		24		14.9		4.2		0.1		---		---		2.1		14.5		23.1		28.3

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		102.3		24.4		19.5		13.4		4.5		---		---		---		---		---		4.5		13.4		22.6

Average Number of Days Below 32F/0C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		52		16.5		10.4		4.4		0.6		---		---		---		---		---		0.5		5.8		13.9

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		7.8		4		1.5		0.2		---		---		---		---		---		---		---		---		2.1

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		1		0.5		0.2		---		---		---		---		---		---		---		---		---		0.3

Average Number of Days Below 0F/-17C

Years on Record: 30

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

Average Precipitation

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		1379.2		124.5		121.9		132.1		109.2		129.5		109.2		104.1		91.4		94		91.4		124.5		147.3

Average Number of Days With Precipitation

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		116.5		10.7		10.4		10.6		10.1		10.2		10.1		10.5		8.5		7.5		7.7		9.4		10.8

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		77.9		7.2		7.1		7.4		6.7		6.7		6.5		6.9		5.5		4.9		5.1		6.8		7.1

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		37.5		3.4		3.4		3.6		3.1		3.6		2.9		2.9		2.3		2.6		2.5		3.4		3.8

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

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		15.9		1.5		1.2		1.6		1.3		1.6		1.1		1		1		1.3		1.1		1.6		1.6

Average Precipitable Water

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm.		2.5		1.4		1.4		1.6		1.9		2.8		3.6		4.2		4		3.2		2.3		1.7		1.5

Average Number of Rainy Days

Years on Record: 26

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		117		11		10		12		10		11		9		10		9		9		7		10		11

Average Number of Days With Thunderstorms

Years on Record: 37

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		54		1		2		4		5		7		8		10		8		4		2		2		1

Most Rain Reported in a Month

Years on Record: 37

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		1860		270		250		430		310		300		380		370		240		240		300		290		470

Least Recorded Rainfall

Years on Record: 37

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		1060		30		10		40		10		30		---		20		10		10		---		10		20

Average Snowfall

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		6.1		2.8		1.3		1.3		---		---		---		---		---		---		---		---		0.8

Average Number of Days With Snow

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		2.3		0.9		0.7		0.3		---		---		---		---		---		---		---		---		0.4

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		0.8		0.4		0.3		0.1		---		---		---		---		---		---		---		---		---

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		0.1		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		1.5		0.9		0.3		0.1		---		---		---		---		---		---		---		---		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		0.5		0.4		---		0.1		---		---		---		---		---		---		---		---		---

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

Average Relative Humidity

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		71.2		72.2		69		65.4		65.6		70.1		73.2		76.3		74.4		71.8		71.4		71		73.2

Average Morning Relative Humidity

Years on Record: 23

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		82		82		81		79		78		79		81		84		86		85		86		84		81

Average Evening Relative Humidity

Years on Record: 23

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		54		60		56		51		46		51		53		56		55		54		51		55		60

Average Dew Point

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		10.2		-0.2		1.3		4.3		8.7		14.3		18.6		20.8		20.1		16.4		10.4		5.3		1.4

Heating Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		3002		729		542		368		154		27		1		---		---		13		138		376		654

Cooling Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		1951		---		1		13		58		191		380		482		470		275		70		9		2

Growing Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		5313		38		58		181		365		629		829		947		934		712		404		159		56

Average Sea Level Pressure

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mbar		1018.4		1021.6		1020.2		1018		1016.5		1016.1		1015.9		1016.9		1016.8		1017.5		1019.4		1020.6		1021.5

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 Number of Days With Fog

Years on Record: 37

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		154		13		11		11		8		12		13		16		17		15		13		12		13

Average Number of Clear Days

Years on Record: 26

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		100		7		7		7		9		8		8		7		9		9		12		9		7

Average Number of Cloudy Days

Years on Record: 26

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		164		18		15		16		14		13		11		11		9		12		12		14		18

Average Number of Partly Cloudy Days

Years on Record: 26

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		101		6		6		8		7		10		11		13		13		9		7		7		6

Average Percent Chance - Clear Skies

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		31.7		30.3		28.6		31.2		32.6		28.1		26.1		26.6		31.4		37		41.3		37.3		30.1

Average Percent Chance - Scattered Clouds

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		8.4		4.5		4.6		6.5		7.8		10.8		12.9		14.6		12.6		10		6.3		5.7		4.5

Average Percent Chance - Few Clouds

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		12.9		8.4		8.6		9.7		12.1		14.8		17.8		19.2		19.4		15.9		11.3		8.5		8.2

Average Percent Chance - Broken Clouds

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		15.7		10.6		11.6		13.5		16		19.1		22.4		22		19.8		16.4		13.3		12.3		11.5

Average Percent Chance - Overcast Skies

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		31.2		46.2		46.6		39.1		31.4		27.1		20.8		17.6		16.7		20.7		27.8		36.2		45.7

Average Total Sky Cover

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		50.6		59.4		59.9		54.3		51.1		51		51.8		47.7		41.1		42.6		41.3		49.2		58

Average Opaque Sky Cover

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		45.7		56.3		55.5		50.3		44.9		44.6		43.6		40.6		36.1		38		38		46.2		54.2

Average Wind Speed

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
km/h		12.1		13.8		14.3		15		14.2		12.6		10.1		8.9		8.7		10.1		10.9		12.4		13.7

Highest Reported Hourly Wind Speed

Years on Record: 45

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
km/h		101.4		70.8		69.2		74		70.8		74		90.1		83.7		101.4		69.2		69.2		64.4		64.4

Average Percent Chance - Calm Winds

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		9.5		6.3		6.3		5.6		5.6		7		11.5		15.6		15.6		11.8		10.7		9.8		7.6

Average Primary Wind Direction

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
°		187.5		202		210.2		182.1		195.2		193.4		206.9		232.6		175.7		146.3		157.1		166.3		182.6

Average Secondary Wind Direction

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
°		183.6		196.5		196.2		173.3		209.7		190.8		210.7		228		189.7		142.7		151.7		164.9		150.2

Average Wind Vector Direction

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
°		145.8		160.7		140		151.8		183.1		164.3		172		187.7		139.1		85		106.9		128.7		129.5

Average Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		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