SAN MATEO, CALIFORNIA

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Elevation: 1 foot Latitude: 37 37N Longitude: 122 23W

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MONTHLY - ALL WEATHER AVERAGES [ Show Summary ]

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TEMPERATURE

Average Temperature

Years on Record: 63

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		57.3		49.1		52.1		53.7		55.8		58.5		61.4		62.7		63.6		64.2		61.1		55.2		49.8

Average High Temperature

Years on Record: 63

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		65.3		55.8		59.1		61.2		63.8		66.8		70		71.4		72.1		73.5		70.2		62.9		56.4

Average Low Temperature

Years on Record: 63

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		49.3		42.5		45		46.2		47.7		50.3		52.7		54.1		55		54.9		52		47.4		43.3

Highest Recorded Temperature

Years on Record: 63

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		106		72		77		85		92		97		106		105		100		103		99		85		75

Lowest Recorded Temperature

Years on Record: 63

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		24		26		30		31		36		39		43		44		45		41		37		31		24

Average Number of Days Above 90F/32C

Years on Record: 63

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		3.9		---		---		---		0.1		0.4		0.8		0.5		0.3		1.4		0.3		---		---

Average Number of Days Above 70F/21C

Years on Record: 50

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		105		---		1		3		5		8		13		18		20		20		14		4		---

Average Number of Days Below 32F/0C

Years on Record: 63

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		2		1		0.2		---		---		---		---		---		---		---		---		---		0.7

Average Number of Days Below 0F/-17C

Years on Record: 63

ANNUAL

JAN

FEB

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APR

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JUN

JUL

AUG

SEP

OCT

NOV

DEC

Days

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PRECIPITATION

Average Precipitation

Years on Record: 63

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		20		4.4		3.6		2.8		1.4		0.4		0.1		---		---		0.2		1		2.3		3.8

Average Number of Days With Precipitation

Years on Record: 63

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		64		11		10		10		6		3		1		---		1		1		3		8		10

Most Reported Precipitation in a Month

Years on Record: 63

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		13.6		11.3		13.6		9		6.4		3.8		0.9		0.4		0.7		2.3		7.3		7.9		12.3

Least Reported Precipitation in a Month

Years on Record: 63

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		---		0.2		---		---		---		---		---		---		---		---		---		---		---

Most Precipitation Reported in a Day

Years on Record: 63

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		5.6		5.6		2.9		2		2.3		1.5		0.8		0.4		0.6		2.3		2.6		2.4		3.2

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

Years on Record: 63

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		38		8		7		6		3		1		---		---		---		---		2		4		7

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

Years on Record: 63

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		15		3		3		2		1		---		---		---		---		---		1		2		3

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

Years on Record: 63

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

PRECIPITATION - RAIN

Average Number of Rainy Days

Years on Record: 66

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		62		11		10		10		6		3		1		---		---		1		4		7		10

Average Number of Days With Thunderstorms

Years on Record: 50

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

Most Rain Reported in a Month

Years on Record: 50

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in.		38.3		11.3		9.5		9		6.4		3.8		0.9		0.3		0.7		2.3		7.3		7.9		12.3

Least Recorded Rainfall

Years on Record: 50

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in.		8.7		0.2		---		---		---		---		---		---		---		---		---		---		---

PRECIPITATION - SNOW

Average Snowfall

Years on Record: 63

ANNUAL

JAN

FEB

MAR

APR

MAY

JUN

JUL

AUG

SEP

OCT

NOV

DEC

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Most Snow Reported in a Month

Years on Record: 63

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		1.5		1.5		---		---		---		---		---		---		---		---		---		---		---

HUMIDITY

Average Morning Relative Humidity

Years on Record: 43

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		82		87		86		82		79		78		77		81		83		82		83		85		86

Average Evening Relative Humidity

Years on Record: 43

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		63		68		66		64		62		61		60		61		62		60		60		63		68

Average Dew Point

Years on Record: 43

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		47		42		44		44		45		47		50		52		53		52		50		46		42

DEGREE DAYS

Heating Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		2862		482		354		339		266		201		120		77		56		62		131		298		476

Cooling Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		142		---		---		---		4		10		21		23		26		38		20		---		---

Growing Degree Days

Years on Record: 63

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		2694.9		---		59.3		114.7		174		263.5		342		393.7		421.6		426		344.1		156		---

VISIBILITY

Average Number of Days With Fog

Years on Record: 50

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		99		17		12		7		4		4		3		4		4		6		9		12		17

Average Number of Clear Days

Years on Record: 66

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		160		8		8		9		11		14		16		21		19		18		15		11		10

Average Number of Cloudy Days

Years on Record: 66

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		104		15		13		13		10		7		5		3		3		4		7		11		14

Average Number of Partly Cloudy Days

Years on Record: 66

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		101		8		7		9		9		10		9		7		9		8		9		8		7

WIND

Average Wind Speed

Years on Record: 43

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mph		13		9		12		13		14		16		16		14		13		12		12		11		10

NEARBY - MAP

NEARBY - LIST

Millbrae, California (0 mi / 1 km)
Burlingame, California (2 mi / 4 km)
Foster City, California (5 mi / 8 km)
Pacifica, California (5 mi / 9 km)
Half Moon Bay, California (10 mi / 17 km)

GEOBA.SE

San Mateo, California

WEATHER FORECAST