BROOKS AIR FORCE BASE, TEXAS

Average Temperature

Years on Record: 59

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		20.7		11.3		12.7		16.6		20.7		24.4		27.8		29.1		29.2		26.6		22.1		15.9		11.4

Average High Temperature

Years on Record: 59

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		27.1		17.7		19.4		23.4		27.2		30.4		33.9		35.6		35.8		32.8		28.7		22.3		17.4

Average Low Temperature

Years on Record: 59

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		14.3		5		5.9		9.9		14.2		18.5		21.7		22.6		22.5		20.4		15.3		9.6		5.3

Highest Recorded Temperature

Years on Record: 59

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		44.4		39.4		33.9		36.7		38.3		40.6		42.2		42.8		42.2		42.8		44.4		40.6		31.1

Lowest Recorded Temperature

Years on Record: 59

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-15.6		-12.8		-15		-15.6		-2.8		3.9		8.3		13.3		5		5		-4.4		-9.4		-12.2

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		20.3		---		---		---		0.1		0.1		1.5		6.9		10.5		1.2		---		---		---

Average Number of Days Above 90F/32C

Years on Record: 59

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		123.5		0.3		0.2		1.4		3.6		10.5		23.5		28.4		28.3		19.7		7		0.6		---

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		206		1.3		2.7		7.8		18.3		27.5		29.5		30.8		31		28.1		21		6.8		1.5

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		284.9		9.5		12.8		22.6		28.5		31		30		31		31		29.8		29.5		19.7		9.5

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		331.5		19.6		21.6		28.9		29.7		31		30		31		31		30		30.9		26.8		21

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		355.7		26.7		26.1		30.7		30		31		30		31		31		30		31		29.4		28.9

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		363.5		30.2		27.6		31		30		31		30		31		31		30		31		30		30.7

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		246.6		31		27.8		30.7		28.3		20		6.6		1.6		1.2		13.1		25.8		29.5		30.9

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		167.8		30		25.2		24.3		14.1		4		---		---		---		2.3		14		24.4		29.4

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		107.6		26.2		19		13.5		4.3		0.3		---		---		---		0.1		4		14.9		25.3

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		47.6		14.3		9.6		2.9		0.7		---		---		---		---		---		0.2		4.3		15.7

Average Number of Days Below 32F/0C

Years on Record: 59

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		22.4		7.7		4.8		1.4		0.2		---		---		---		---		---		0.1		1.5		6.7

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		0.2		0.2		---		---		---		---		---		---		---		---		---		---		---

Average Precipitation

Years on Record: 59

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		650		37		39		47		81		83		76		41		42		67		55		41		42

Average Number of Days With Precipitation

Years on Record: 59

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		71		7		6		7		7		7		6		4		4		6		5		5		7

Most Reported Precipitation in a Month

Years on Record: 59

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		284		144		158		137		240		225		284		111		227		224		256		172		138

Least Reported Precipitation in a Month

Years on Record: 59

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		---		---		---		2		5		28		1		---		---		3		---		---		---

Most Precipitation Reported in a Day

Years on Record: 59

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		227.1		57.9		83.8		80.8		116.1		98.3		227.1		64.5		75.7		94		151.4		54.1		96.5

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

Years on Record: 59

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		39		3		3		3		4		4		4		3		2		4		3		3		3

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

Years on Record: 59

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

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

Years on Record: 59

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

Average Precipitable Water

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm.		2.9		1.7		1.8		2		2.4		3.1		3.9		4.2		4.3		3.9		2.9		2.2		1.8

Average Snowfall

Years on Record: 59

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		6.1		2.5		1.3		1.8		---		---		---		---		---		---		---		---		0.5

Most Snow Reported in a Month

Years on Record: 59

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		17.8		17.8		10.7		5.1		---		---		---		---		---		---		---		---		4.6

Average Relative Humidity

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		66		63.3		63.4		65		67.4		68.8		67.1		68.7		64.6		66.6		66.9		66.3		62.4

Heating Degree Days

Years on Record: 59

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		313.9		96.7		65.6		26.1		1.7		---		---		---		---		---		1.7		28.9		93.3

Cooling Degree Days

Years on Record: 59

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		1723.9		9.4		11.1		41.7		93.9		191.1		283.9		333.9		336.1		248.3		134.4		31.7		8.3

Growing Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		7446		146		213		409		606		851		978		1063		1109		895		668		355		152

Average Length of Day

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hours		12.6		11		11.6		12.4		13.3		14.1		14.4		14.2		13.6		12.7		11.8		11.1		10.7

Average Total Sky Cover

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		49.4		52.8		55		56		55.4		56.1		48.4		42.9		37.8		41.8		43.9		50.4		51.4

Average Opaque Sky Cover

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		46.2		50.4		51		53		51.8		52		44		38.7		34		38.3		42.4		49		49

Average Wind Speed

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
km/h		10.7		10.3		11.1		12.3		12.7		12.6		12.1		10.8		9.5		8.7		9.3		9.5		9.4

Average Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		16.5		10.2		12.3		15.9		18.8		20.1		22.4		23.2		21.4		17.8		14.8		11.4		9.7

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		4.1		5.2		6.4		7.6		8.5		8.5		8.1		7.5		6.7		5.2		4.3		3.8

Average Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		17.2		13.1		14.7		17.3		18.4		18.5		19.9		20.8		20.4		18.5		17.5		14.4		12.9

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		16.9		13.2		13.4		15.8		17		16.9		20.2		22.1		20.7		17.6		17.2		14.8		13.3

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		16.5		10.2		12.3		15.9		18.8		20.1		22.4		23.2		21.4		17.8		14.8		11.4		9.7

Maximum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		6.7		4.3		5.4		6.7		8		8.8		9.1		8.8		8.1		7.1		5.7		4.6		4

Maximum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		20.6		17		18.5		22.6		22.6		20.9		22.4		23		22.2		21.4		21.4		19.1		15.9

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		22.8		19.3		19.2		24.8		24.8		21.6		26		27.1		24.3		22.5		23.4		22.6		18

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		13.4		8.2		9.9		12.9		14.8		16.6		18.6		20.2		18.7		15.2		10.4		8.5		7

Minimum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		5.6		3.6		4.7		5.2		6.6		8		7.7		7.2		6.9		6		4.5		3.5		3.5

Minimum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		13.6		9.9		11.3		13.6		14.3		15.4		16.7		18.3		17.9		15.7		11.4		9.9		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		11		8.5		8.6		10.3		10.4		11.3		13.8		16.7		15.8		13		8.4		8.2		7