ONTARIO, CALIFORNIA

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Elevation: 287 feet Latitude: 34 03N Longitude: 117 36W

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MONTHLY - ALL WEATHER AVERAGES [ Show Summary ]

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TEMPERATURE

Average Temperature

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		66		55		57		58		63		67		73		78		78		76		69		60		55

Average High Temperature

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		78		66		68		68		75		78		87		92		92		89		82		73		67

Average Low Temperature

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		53		43		45		47		50		55		59		63		64		62		56		47		42

Highest Recorded Temperature

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		114		90		89		97		110		107		111		114		113		112		110		95		99

Lowest Recorded Temperature

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		24		25		29		30		35		38		43		52		51		47		40		29		24

Average Number of Days Above 90F/32C

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		82		---		---		---		2		3		11		21		22		15		7		1		---

Average Number of Days Above 70F/21C

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		260		11		12		13		20		25		29		31		31		29		29		19		12

Average Number of Days Below 32F/0C

Years on Record: 22

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

PRECIPITATION - RAIN

Average Number of Days With Thunderstorms

Years on Record: 22

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

HUMIDITY

Average Morning Relative Humidity

Years on Record: 21

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		77		77		78		83		78		80		77		76		76		74		74		72		74

Average Evening Relative Humidity

Years on Record: 21

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		43		46		47		51		46		47		41		38		39		41		41		39		43

Average Dew Point

Years on Record: 21

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		48		38		41		45		47		52		55		59		59		57		50		40		37

DEGREE DAYS

Heating Degree Days

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		1348.6		325.5		240.1		232.5		75		---		---		---		---		---		---		150		325.5

Cooling Degree Days

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		1516		---		---		---		---		46.5		240		387.5		403		315		124		---		---

Growing Degree Days

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		5646.1		139.5		183.6		232.5		375		511.5		690		852.5		868		765		589		300		139.5

VISIBILITY

Average Number of Days With Fog

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		178		13		13		17		14		18		17		15		15		15		17		12		12

WIND

Average Wind Speed

Years on Record: 21

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mph		9		6		9		10		10		10		11		10		11		10		10		6		6

NEARBY - MAP

NEARBY - LIST

South Fontana, California (6 mi / 9 km)
Upland - Pioneer Park, California (6 mi / 10 km)
Claremont - Pomona College, California (7 mi / 12 km)
Upland, California (7 mi / 12 km)
Live Oak Canyon, California (8 mi / 14 km)

GEOBA.SE

Ontario, California

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