JEFFERSON, TEXAS

Average Temperature

Years on Record: 108

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		63.8		44.3		48.8		56.2		63.1		71.6		78.6		81.5		81.4		75		64		54.5		46

Average High Temperature

Years on Record: 108

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		75.6		55.9		61		68.5		75.8		82.8		89		92.2		93		87.1		77.4		66.7		57.5

Average Low Temperature

Years on Record: 108

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		51.9		32.6		36.6		43.9		50.4		60.4		68.2		70.8		69.9		62.9		50.6		42.2		34.5

Highest Recorded Temperature

Years on Record: 108

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		108		82		92		89		93		97		103		105		107		108		95		87		86

Lowest Recorded Temperature

Years on Record: 108

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		-5		9		5		15		28		39		46		55		52		38		25		16		-5

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		5.8		---		---		---		---		---		0.1		1.6		3.4		0.7		---		---		---

Average Number of Days Above 90F/32C

Years on Record: 108

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		79.1		---		---		---		0.3		3.5		14.4		23		24		12.3		1.5		---		---

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		166.1		0.1		0.5		3.4		9.4		21.9		27.9		30.6		30.2		25.5		13.5		2.8		0.2

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		240.5		3.8		5.5		14.7		22.9		30.3		30		31		31		29.3		25.3		12		4.7

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		298.7		12.3		15.1		24.2		28.6		31		30		31		31		29.9		30		22.1		13.6

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		336.8		21.3		22.1		29		29.9		31		30		31		31		30		31		28		22.6

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		358.3		28.3		26.3		30.8		30		31		30		31		31		30		31		29.8		29

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		293.6		31		28		31		29.5		27.1		15.3		7.1		9.8		23.9		30		29.8		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		219.2		30.5		27.4		29.3		24.3		12.1		2.2		0.2		1		9.3		24.6		28		30.2

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		158.9		29		25.1		22.4		13.6		2.2		0.1		---		---		2.6		14.3		22.3		27.4

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		98.8		25.5		19.1		11.3		3.2		0.1		---		---		---		---		4.6		12.8		22.2

Average Number of Days Below 32F/0C

Years on Record: 108

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		55.1		17.4		10.3		4.4		0.7		---		---		---		---		---		0.6		6.4		15.4

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		4.8		2.1		0.9		0.1		---		---		---		---		---		---		---		---		1.7

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

Average Precipitation

Years on Record: 108

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		47.2		4		3.8		4.2		4.7		4.8		4		3.4		2.7		3.1		3.6		4.2		4.6

Average Number of Days With Precipitation

Years on Record: 108

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

Most Reported Precipitation in a Month

Years on Record: 108

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		19.1		10.3		11.9		11.6		19.1		15.2		15.3		10.1		10.9		13.7		14.7		13.6		14

Least Reported Precipitation in a Month

Years on Record: 108

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

Most Precipitation Reported in a Day

Years on Record: 108

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		9.1		4.1		4		6		9.1		6.5		6.6		6.2		4.2		7.8		8.6		4.9		6.1

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		67.9		6.2		6.5		6.5		5.3		6.4		6.2		4.2		4.2		4.2		5.9		6.3		6

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

Years on Record: 108

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		63		6		6		6		6		6		5		5		4		4		4		5		6

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

Years on Record: 108

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		31		3		3		3		3		3		2		2		2		2		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		32.4		2.5		2.6		3.3		2.5		3.2		3		2.1		1.8		2.4		3.1		3.2		2.7

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

Years on Record: 108

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		15		1		1		1		2		2		1		1		1		1		1		2		1

Average Snowfall

Years on Record: 108

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		1.2		0.5		0.3		---		---		---		---		---		---		---		---		---		0.4

Average Number of Days With Snow

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		0.8		0.1		0.5		---		---		---		---		---		---		---		---		---		0.2

Most Snow Reported in a Month

Years on Record: 108

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		19.8		5.5		10		2		---		---		---		---		---		---		---		4		19.8

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

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

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		0.6		0.4		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		0.3		0.2		0.1		---		---		---		---		---		---		---		---		---		---

Heating Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		2585		641		475		300		120		13		---		---		---		13		111		327		587

Cooling Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		2237		2		3		19		67		229		413		536		533		316		94		19		4

Growing Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		5792		52		82		231		403		682		862		1001		998		753		453		200		76

Average Length of Day

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hours		12.6		10.7		11.5		12.4		13.5		14.3		14.8		14.5		13.7		12.8		11.8		10.9		10.5

Average Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		4.3		2.5		3.2		4.1		5.3		5.5		6		6.2		5.7		4.9		3.8		2.8		2.3

Average Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		1.7		1		1.3		1.7		2		2.4		2.4		2.3		2.1		1.7		1.3		1.1		0.9

Average Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		4.6		3.4		4		4.6		5.2		5.1		5.3		5.5		5.5		5.2		4.7		3.8		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		4.6		3.5		3.8		4.2		5.1		4.7		5.3		5.7		5.5		5.2		4.7		3.9		3.3

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		4.3		2.5		3.2		4.1		5.3		5.5		6		6.2		5.7		4.9		3.8		2.8		2.3

Maximum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		1.8		1.1		1.4		1.8		2.2		2.4		2.5		2.4		2.2		1.8		1.5		1.1		1

Maximum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		5.6		4.6		4.8		6.2		6.5		5.9		6		6.2		6.4		5.8		5.7		5.4		4.2

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		6.3		5.2		5		6.9		7.4		6.3		6.8		7.2		7.5		6.3		6.3		6.4		4.8

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		3.6		2		2.3		3.4		4.5		4.8		4.8		5.5		5.1		4.4		2.7		2		1.7

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		1.2		1.4		1.7		2.2		2.2		2.1		1.8		1.6		1.2		0.8		0.8

Minimum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		3.7		2.6		2.6		3.7		4.4		4.4		4.3		4.9		4.9		4.6		3		2.4		2.2

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		3.1		2.3		1.9		2.8		3.7		3.5		3.3		4.5		4.4		4.2		2.3		2		1.8