CASTLE ROCK, SOUTH DAKOTA

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Elevation: 954 meters Latitude: 44 57N Longitude: 103 46W

WEATHER

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Climate Summary

CURRENT CONDITIONS

Sunrise/Set

08:00 am

09:47 pm
Local Time
1:13 am EDT
20 April, 2024

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MONTHLY - ALL WEATHER AVERAGES [ Show Summary ]

[ °F ] °C

TEMPERATURE

Average Temperature

Years on Record: 9

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		6.4		-9.4		-5.9		-2		5.5		11.6		16.8		21.7		20.3		14.7		8.7		0.6		-6.1

Average High Temperature

Years on Record: 9

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		13.7		-2.8		0.9		4.8		12.2		18.8		23.3		29.4		28.8		22.8		17.5		8.1		0.4

Average Low Temperature

Years on Record: 9

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-0.9		-16.1		-12.7		-8.8		-1.2		4.5		10.3		13.9		11.9		6.5		-0.1		-6.9		-12.7

Highest Recorded Temperature

Years on Record: 9

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		41.7		17.8		17.2		25.6		28.9		35		38.9		41.7		41.7		35.6		33.3		24.4		17.2

Lowest Recorded Temperature

Years on Record: 9

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-37.2		-37.2		-32.2		-27.2		-16.7		-9.4		-1.1		3.3		2.2		-6.1		-12.8		-28.3		-33.9

Average Number of Days Above 90F/32C

Years on Record: 9

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		22.5		---		---		---		---		0.4		1.4		8		10.6		1.9		0.2		---		---

Average Number of Days Below 32F/0C

Years on Record: 9

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		191.8		30.5		27.9		28.3		20.1		4.9		0.5		---		---		2.8		17.6		28.6		30.8

Average Number of Days Below 0F/-17C

Years on Record: 9

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		33.5		12.9		7.9		4.3		---		---		---		---		---		---		---		1		7.5

PRECIPITATION

Average Precipitation

Years on Record: 9

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		350		6		10		13		33		57		94		53		26		29		13		8		8

Average Number of Days With Precipitation

Years on Record: 9

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		86		5		5		5		9		11		15		9		8		6		4		4		5

Most Reported Precipitation in a Month

Years on Record: 9

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		145		10		29		26		67		121		145		81		55		66		30		29		18

Least Reported Precipitation in a Month

Years on Record: 9

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		---		2		1		7		9		21		63		13		11		2		---		1		1

Most Precipitation Reported in a Day

Years on Record: 9

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		53.6		4.6		12.7		7.1		19.3		30		53.6		48.3		16.5		25.6		15.5		3.3		10.2

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

Years on Record: 9

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		35		1		1		2		4		5		8		5		3		3		1		1		1

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

Years on Record: 9

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		6		---		---		---		1		1		2		1		---		1		---		---		---

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

Years on Record: 9

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

PRECIPITATION - SNOW

Average Snowfall

Years on Record: 9

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		74.4		9.7		13.5		15.2		14.7		5.3		---		---		---		1		0.5		2		12.4

Most Snow Reported in a Month

Years on Record: 9

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		48.3		16.8		30.7		30.5		48.3		20.3		---		---		---		7.6		5.1		11.4		27.9

DEGREE DAYS

Heating Degree Days

Years on Record: 9

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		3136.7		688.3		526.7		458.9		222.8		86.7		10.6		---		3.9		38.9		148.3		366.7		585

Cooling Degree Days

Years on Record: 9

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		256.1		---		---		---		---		6.1		26.1		112.8		92.2		17.2		1.7		---		---

Growing Degree Days

Years on Record: 9

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		1076.9		---		---		---		---		49.9		203.3		363.4		320.3		140		---		---		---

SKY CONDITIONS

Average Length of Day

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hours		12.8		9.8		11		12.5		14.1		15.5		16.2		15.8		14.5		13		11.4		10.1		9.4

SOLAR RADIATION

Average Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		14.4		5.9		9.1		12.7		17.4		21.2		23.6		24		20.8		15.8		10.6		6.6		5.1

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		2.1		3.1		4.8		6.4		7.7		8.1		7.4		6.4		5		3.6		2.4		1.8

Average Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		16.9		12.4		14.8		16.4		18.2		19.5		20.4		21.4		20.8		19		16.1		12.6		10.6

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		18.8		12.7		15.6		16.6		19.2		22.1		24.8		26.8		24.5		21		17.1		13.2		11.8

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		14.4		5.9		9.1		12.7		17.4		21.2		23.6		24		20.8		15.8		10.6		6.6		5.1

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		5.1		6.9		8.3		8.8		8.5		7		5.7		3.8		2.6		1.9

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		14.5		17.7		18.9		22.6		21.8		22.9		23.2		23		21.6		18.9		16.2		13.8

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		23.6		15.8		19.8		20.6		27.4		27		31		31.3		29.1		25.4		21.1		18.4		16.7

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		11.7		5.2		6.5		10.4		14.1		14.9		20.8		19.6		18.9		12.2		9.2		5.3		3.6

Minimum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		4.4		1.9		2.8		4.4		5.4		7.1		7.2		6.7		5.6		4.4		3.2		2		1.6

Minimum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		13.1		10		9.6		12.9		14.4		13.6		18.1		17.4		18.7		13.8		13.2		9		6.4

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		12.5		9.7		8.3		11.2		12.7		10.7		19.2		17.8		20.3		12.6		13		8.5		6.2

NEARBY - MAP

NEARBY - LIST

Belle Fourche, South Dakota (8 mi / 12 km)
Colony, Wyoming (8 mi / 13 km)
Orman, South Dakota (16 mi / 25 km)
Aladdin, Wyoming (19 mi / 31 km)
Fruitdale, South Dakota (19 mi / 32 km)

GEOBA.SE

Castle Rock, South Dakota