GRASS CREEK, WYOMING

Average Temperature

Years on Record: 19

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		5.2		-7		-3.6		-1.6		3.7		9.2		14.1		18.6		17.6		11.6		6.2		-0.9		-5.4

Average High Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		13.2		0.9		3.8		6.6		10.7		16.7		23		27.1		26.2		20.9		14.6		5.1		1.7

Average Low Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-3.1		-15.1		-11.4		-7.6		-3.5		1.2		5.8		8.8		7.4		2.6		-1.9		-9.3		-14.2

Highest Recorded Temperature

Years on Record: 19

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		36.7		15		15.6		21.7		23.9		31.1		33.9		33.9		36.7		32.8		28.9		20.6		17.2

Lowest Recorded Temperature

Years on Record: 19

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-42.8		-42.8		-31.7		-33.3		-23.3		-12.2		-3.3		-4.4		-2.8		-13.3		-23.3		-32.8		-38.9

Average Number of Days Above 90F/32C

Years on Record: 19

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		4.5		---		---		---		---		---		0.4		1.9		2.2		0.1		---		---		---

Average Number of Days Below 32F/0C

Years on Record: 19

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		207.1		29.6		26.4		27.7		23.8		12.2		1.8		0.1		0.7		8.9		20		26.8		29.1

Average Number of Days Below 0F/-17C

Years on Record: 19

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		31.9		11.2		4.9		4.4		0.5		---		---		---		---		---		0.2		2.5		8.3

Average Precipitation

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		398		12		10		26		53		75		40		37		43		35		38		20		12

Average Number of Days With Precipitation

Years on Record: 19

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		72		4		4		6		8		9		9		7		6		6		5		4		4

Most Reported Precipitation in a Month

Years on Record: 19

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		183		31		24		64		117		183		167		83		71		118		98		40		34

Least Reported Precipitation in a Month

Years on Record: 19

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		---		4		---		9		19		14		5		6		4		2		---		2		2

Most Precipitation Reported in a Day

Years on Record: 19

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		54.9		12.7		8.4		24.1		37.1		33.8		49.3		31.2		54.9		42.7		26.9		19.6		19.6

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

Years on Record: 19

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		40		2		1		3		5		6		6		4		3		3		3		2		2

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

Years on Record: 19

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		9		---		---		---		2		2		2		1		---		1		1		---		---

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

Years on Record: 19

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

Average Snowfall

Years on Record: 19

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		94.2		14		10.2		23.9		19.8		2.3		---		---		---		0.8		5.1		9.7		8.6

Average Snow Cover

Years on Record: 19

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		2		5		2		2		2		---		---		---		---		---		---		2		2

Most Snow Reported in a Month

Years on Record: 19

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		50.8		28.2		25.4		41.9		48.3		25.4		---		---		---		15.2		50.8		35.6		15.2

Heating Degree Days

Years on Record: 19

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		3226.7		612.8		462.8		443.9		274.4		126.1		33.9		1.7		6.1		77.2		210.6		412.2		565

Cooling Degree Days

Years on Record: 19

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		81.7		---		---		---		---		0.6		9.4		39.4		30		2.2		---		---		---

Growing Degree Days

Years on Record: 19

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		669.4		---		---		---		---		---		123.3		265.2		234.2		46.7		---		---		---

Average Length of Day

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hours		12.7		9.9		11		12.5		14		15.3		16		15.6		14.4		12.9		11.4		10.2		9.5

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		6.6		10.1		14.7		18.8		21.7		23		23		20.1		15.9		11.4		7.5		5.8

Average Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		4.9		2.2		3.1		4.5		6.3		7.7		8.3		7.8		6.7		5.2		3.5		2.4		1.9

Average Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		17.6		13.8		16.5		19.2		19.8		20		19.9		20.5		19.9		18.8		17.1		14.2		11.8

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		19.7		14.5		17.9		20.9		21.8		22.7		23.3		24.3		22.5		20.5		18.4		15.3		13.7

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		6.6		10.1		14.7		18.8		21.7		23		23		20.1		15.9		11.4		7.5		5.8

Maximum 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		2.3		3.4		5		6.8		8.3		8.9		8.3		7.1		5.5		4		2.6		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		20.6		16.3		19.9		22.7		23.5		22.5		22.2		23.7		22.2		21.7		19.8		16.9		15.8

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		25		17.8		23.8		26.3		29.1		28.3		28.9		32.2		27.2		25.4		22.3		18.8		19.5

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		13.1		6.2		8.6		12.3		16.2		18.6		20.3		20.9		18.7		14.5		9.2		6.7		4.8

Minimum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		4.3		1.9		2.4		3.8		5.2		6.9		7.5		6.5		6		4.5		3.1		2.1		1.4

Minimum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		15		12.2		13.1		15.2		16.8		17.1		17.6		18.6		18.5		16.7		12.8		12.5		8.9

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		15.2		12.7		13.1		14.9		16.3		16.7		18.1		20.2		19.5		17.1		12.2		12.6		9.5