HALF MOON BAY, CALIFORNIA

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Elevation: 12 meters Latitude: 37 28N Longitude: 122 26W

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CURRENT CONDITIONS

Sunrise/Set

06:50 am

04:58 pm
Local Time
3:57 am PST
15 November, 2024

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MONTHLY - ALL WEATHER AVERAGES [ Show Summary ]

[ °F ] °C

TEMPERATURE

Average Temperature

Years on Record: 72

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		12.6		10.3		10.8		11		11.4		12.6		13.7		14.4		14.9		15.1		13.9		12.2		10.6

Average High Temperature

Years on Record: 72

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		16.8		14.6		15.2		15.4		15.9		16.5		17.4		17.9		18.4		19.4		18.8		17.1		14.9

Average Low Temperature

Years on Record: 72

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		8.4		6.1		6.4		6.6		7		8.6		9.9		11.1		11.5		10.7		9.1		7.5		6.3

Highest Recorded Temperature

Years on Record: 72

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		35.6		24.4		25.6		30		30.6		35.6		34.4		28.9		34.4		34.4		34.4		30.6		26.1

Lowest Recorded Temperature

Years on Record: 72

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-7.8		-2.8		-5.6		-2.2		-0.6		0.6		2.2		4.4		5		1.7		0.6		-1.1		-7.8

Average Number of Days Above 90F/32C

Years on Record: 72

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		0.4		---		---		---		---		0.1		---		---		---		0.2		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		2.8		---		---		0.1		0.3		---		---		---		0.2		0.5		1.5		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		24.3		0.7		1.5		1.4		1.6		0.8		1.3		1.7		2.9		4.4		5		2.7		0.4

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		243.4		11.3		12.3		13.4		13.8		18.5		25.5		29.7		30.8		29.3		27.5		19.1		12.1

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		363.5		30.5		27.6		31		30		31		30		31		31		30		31		30		30.4

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		365		31		28		31		30		31		30		31		31		30		31		30		31

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		365		31		28		31		30		31		30		31		31		30		31		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		364.3		31		28		31		30		31		30		31		30.7		29.7		31		30		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		253.5		28.8		25.9		28.6		28		23.1		15.4		7.2		6.4		14.2		22.2		26		27.9

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		67.6		12.1		10		10		8		3		0.8		---		---		0.9		3.1		7.6		12

Average Number of Days Below 32F/0C

Years on Record: 72

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		2.4		0.9		0.3		0.2		0.1		---		---		---		---		---		---		0.2		0.7

PRECIPITATION

Average Precipitation

Years on Record: 72

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		669		133		116		96		48		20		7		3		5		9		40		77		116

Average Number of Days With Precipitation

Years on Record: 72

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		86		12		11		11		7		5		3		3		4		4		6		9		11

Most Reported Precipitation in a Month

Years on Record: 72

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		399		308		399		331		189		104		37		26		40		93		279		250		351

Least Reported Precipitation in a Month

Years on Record: 72

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		---		7		6		---		---		---		---		---		---		---		---		---		1

Most Precipitation Reported in a Day

Years on Record: 72

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		139.7		135.4		74.2		97.8		59.9		32.5		28.4		15.2		18.3		65		124.5		71.9		139.7

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		50.1		8.6		8.8		7.9		4		2.3		0.9		0.1		0.4		0.8		2.4		5.8		8.1

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

Years on Record: 72

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		46		8		8		7		4		2		1		---		---		1		3		5		7

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

Years on Record: 72

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		17		4		3		3		1		---		---		---		---		---		1		2		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		18.6		3.7		3.8		3.1		1		0.5		---		---		---		0.1		1		1.9		3.5

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

Years on Record: 72

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

DEGREE DAYS

Heating Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		3948		457		389		425		393		343		260		208		180		209		274		359		451

Cooling Degree Days

Years on Record: 30

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

Growing Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		1737		58		65		69		76		128		191		257		285		243		196		107		61

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

Burlingame, California (9 mi / 14 km)
Foster City, California (9 mi / 15 km)
Pacifica, California (9 mi / 15 km)
San Mateo, California (10 mi / 17 km)
Woodside, California (10 mi / 16 km)

GEOBA.SE

Half Moon Bay, California