BUTLER, PENNSYLVANIA

Average Temperature

Years on Record: 67

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		50.6		29.3		29.3		38.5		49.1		59.7		68.5		72.4		70		64.1		53.2		41.6		31.5

Average High Temperature

Years on Record: 67

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		62.6		38		39.2		49.3		61.7		73.9		82.1		86.3		84		78.5		66.9		51.6		40

Average Low Temperature

Years on Record: 67

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		38.5		20.4		19.5		27.8		36.2		45.7		54.7		58.4		56.2		49.6		39.5		31.5		22.9

Highest Recorded Temperature

Years on Record: 67

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		104		75		73		84		91		93		99		104		101		100		92		83		70

Lowest Recorded Temperature

Years on Record: 67

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		-27		-22		-27		-4		7		19		32		38		34		24		17		-5		-18

Average Number of Days Above 90F/32C

Years on Record: 67

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		24.5		---		---		---		---		1		5.4		9.4		5.7		2.8		0.1		---		---

Average Number of Days Below 32F/0C

Years on Record: 67

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		136.1		25.5		24		21.5		10.9		2.7		0.1		---		---		0.9		8.3		17.1		25

Average Number of Days Below 0F/-17C

Years on Record: 67

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		5.8		2.1		2.4		0.1		---		---		---		---		---		---		---		0.1		1.1

Average Precipitation

Years on Record: 67

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		40.1		2.8		2.6		3.7		3.9		3.8		4.2		4.1		3.6		2.9		2.8		2.9		2.7

Average Number of Days With Precipitation

Years on Record: 67

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		127		13		11		13		12		11		11		10		8		8		8		11		11

Most Reported Precipitation in a Month

Years on Record: 67

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		9.5		7.9		7.3		7.8		7.6		7.6		9.3		9.1		9.1		6.1		9.5		7.2		5.6

Least Reported Precipitation in a Month

Years on Record: 67

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		0.3		1		0.6		1.4		0.4		0.8		1.1		1.9		0.6		0.3		0.6		1		0.5

Most Precipitation Reported in a Day

Years on Record: 67

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		4.3		1.8		1.6		2.2		2.7		2.6		3.6		3.1		3.7		2.6		4.3		3.3		2

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

Years on Record: 67

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

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

Years on Record: 67

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		30		2		2		3		3		3		3		3		3		2		2		2		2

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

Years on Record: 67

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		9		---		---		1		1		1		1		1		1		1		1		1		---

Average Snowfall

Years on Record: 67

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		42.2		10.1		9.7		8		1.4		---		---		---		---		---		0.1		3.7		9.2

Most Snow Reported in a Month

Years on Record: 67

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		36		26		30.5		21.5		10		1		---		---		---		---		2		33		36

Heating Degree Days

Years on Record: 67

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		3637		796		726		522		233		50		4		---		---		19		140		416		731

Cooling Degree Days

Years on Record: 67

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		722		---		---		1		5		43		152		239		181		89		12		---		---

Growing Degree Days

Years on Record: 67

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		2692.3		---		---		---		---		300.7		555		694.4		620		423		99.2		---		---

Average Length of Day

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hours		12.7		10.2		11.2		12.5		13.8		15		15.6		15.3		14.2		12.9		11.5		10.4		9.8

Average Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		3.6		1.7		2.5		3.3		4.4		5		5.7		5.7		5		4.1		2.8		1.7		1.4

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		0.8		1.1		1.5		2		2.3		2.5		2.4		2.1		1.6		1.2		0.8		0.7

Average Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		3.9		2.8		3.5		3.9		4.4		4.6		4.9		5.1		4.8		4.6		3.8		2.5		2.3

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		3.8		2.7		3.3		3.5		4		4.2		4.9		5.2		4.7		4.5		3.6		2.4		2.2

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		3.6		1.7		2.5		3.3		4.4		5		5.7		5.7		5		4.1		2.8		1.7		1.4

Maximum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		1.6		0.8		1.1		1.5		2		2.4		2.5		2.4		2.1		1.7		1.2		0.9		0.7

Maximum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		4.8		3.7		4.4		5.2		5		5.5		5.6		5.6		5.5		5.4		4.8		3.8		3.2

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		5.1		3.8		4.6		5.4		5		5.9		6.5		6.4		6		5.8		5		4.1		3.2

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		2.9		1.3		2.1		2.8		3.7		3.7		4.8		4.8		4.4		3.3		2.3		1.1		1.1

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		0.7		1		1.4		1.9		2.2		2.3		2.2		1.9		1.5		1.1		0.7		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		3.1		1.8		2.8		3.1		3.7		3.4		4.2		4.3		4.2		3.5		2.9		1.4		1.7

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		2.5		1.5		2.5		2.4		2.8		2.3		3.5		3.6		3.6		2.9		2.5		1		1.4