BLACK MOUNTAIN, CALIFORNIA

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Elevation: 710 meters Latitude: 37 17N Longitude: 122 09W

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CURRENT CONDITIONS

Sunrise/Set

09:05 am

11:04 pm
Local Time
11:21 pm EDT
8 May, 2024

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MONTHLY - ALL WEATHER AVERAGES [ Show Summary ]

[ °F ] °C

TEMPERATURE

Average Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		13		7.7		7.8		9.1		10.4		13.1		16.2		19.7		20.4		18.7		15.1		10.1		7.4

Average High Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		17.6		11.2		11.3		13.2		15.3		17.4		22.1		25.1		26.6		24		20		13.7		10.7

Average Low Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		8.4		4.2		4.2		4.9		5.6		8.8		10.2		14.3		14.1		13.4		10.2		6.4		4.2

Highest Recorded Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		38.8		16.1		19.4		24.1		26.7		32.5		36.4		38.8		38		34.2		28.1		21.7		16.9

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		0.1		---		---		---		---		---		---		0.1		---		---		---		---		---

Average Number of Days Above 90F/32C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		7.4		---		---		---		---		---		0.7		2		3.8		0.9		0.1		---		---

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		48.8		---		---		---		0.5		2		5.9		12.3		15.1		9.8		3.1		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		121.4		0.4		0.4		1.7		4.7		8.4		16.8		24.8		26.9		21.3		13.4		2.4		0.3

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		201.9		5.1		3.7		9.5		13.5		18.7		26.6		30.1		30.4		27.7		23.8		9.4		3.3

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		301.9		18.3		16.5		22.6		25		27.8		29.8		31		31		29.8		30.7		23.1		16.5

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		361.8		29.9		27.6		30.5		29.9		31		30		31		31		30		31		29.8		30

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		356		31		28		31		30		30.8		29.5		28.1		27.6		28.2		30.7		30		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		317.2		31		28		31		29.4		26.8		25.9		17.8		19.2		19.5		27.8		29.7		31

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		249.3		29.7		27.4		28.3		26.6		22.1		18		8.1		7.9		8.6		16.3		25.9		30.3

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		91.1		16.3		15.3		15.1		13.6		4.5		1.2		0.1		---		0.1		0.8		7.6		16.4

Average Number of Days Below 32F/0C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		10.1		3.4		1.6		1.3		0.8		0.2		---		---		---		---		---		0.5		2.3

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		0.1		---		---		---		---		---		---		---		---		---		---		---		0.1

PRECIPITATION

Average Precipitation

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		1061.7		200.7		218.4		139.7		71.1		33		7.6		2.5		2.5		7.6		45.7		119.4		215.9

Average Number of Days With Precipitation

Years on Record: 42

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		71		11		10		11		7		5		2		1		1		2		4		8		9

Most Reported Precipitation in a Month

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		131		78		131		75		41		26		33		37		16		32		23		50		68

Most Precipitation Reported in a Day

Years on Record: 42

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		203.4		123.2		116.8		87.6		85.1		58.7		29.5		12.4		14		89.4		118.1		101.6		203.4

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

Years on Record: 42

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		48		8		7		8		5		2		1		---		---		1		3		6		7

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

Years on Record: 42

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		23		5		4		4		2		---		---		---		---		---		1		3		4

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

Years on Record: 42

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		12		3		2		2		1		---		---		---		---		---		1		1		2

PRECIPITATION - SNOW

Average Snowfall

Years on Record: 42

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		1.8		0.2		0.2		0.5		0.2		---		---		---		---		---		---		---		0.5

Most Snow Reported in a Month

Years on Record: 42

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		12.7		5.1		7.6		12.7		3.8		---		---		---		---		---		---		---		9.7

DEGREE DAYS

Heating Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		4075		595		532		520		432		322		175		74		55		98		216		448		607

Cooling Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		570		---		---		---		6		31		58		150		168		117		36		3		---

Growing Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		2754		32		21		62		102		211		337		541		578		471		294		83		23

SKY CONDITIONS

Average Length of Day

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hours		12.7		10.4		11.3		12.5		13.7		14.7		15.2		14.9		14		12.8		11.6		10.6		10.1

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		18.3		8.7		12.1		17.1		22.8		26.4		28.4		26.9		24.1		19.9		15		10.2		7.7

Average Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		4.8		3		3.8		4.9		5.7		6.4		6.5		6.5		5.9		4.8		3.7		3		2.7

Average Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		20.1		13.7		16.3		20.5		23.5		24.1		24.4		23.7		23.5		22.6		20.5		15.8		12.8

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		23.8		14.8		17.9		22.2		27.6		30.6		32.9		30.7		28.6		26.1		22.9		17.8		13.9

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		18.3		8.7		12.1		17.1		22.8		26.4		28.4		26.9		24.1		19.9		15		10.2		7.7

Maximum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		5.8		3.3		4.4		5.7		6.9		8.2		8.3		8.5		7.4		5.9		4.4		3.5		3

Maximum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		23.9		16.8		22.2		26.1		26.1		26.7		27		27.9		26.8		25.6		23.3		20.7		17.9

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		31.1		19.3		27.5		32		33.1		37.2		40.1		41.9		36.1		31.7		27.4		25.2		21.3

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		15.1		6.7		9.2		14.3		19.5		21.1		23.6		21.2		19.7		17.2		13		8.6		6.6

Minimum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		3.6		2.7		2.6		3.4		4.7		5		4.9		4.1		4.4		3.8		3.1		2.2		2.1

Minimum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		16.1		9.5		11.4		16.5		19.8		19.3		20.6		19		19.1		18.9		17		12.5		10.2

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		16.3		8.8		10.4		15.7		20.3		19.7		22.9		19.3		19.3		19.5		17.4		12.6		10.1

NEARBY - MAP

NEARBY - LIST

Cupertino, California (2 mi / 3 km)
La Honda, California (6 mi / 10 km)
Portola Valley, California (9 mi / 14 km)
Redwood Estates, California (9 mi / 15 km)
Lexington Hills, California (10 mi / 16 km)

GEOBA.SE

Black Mountain, California