RANCHO CUCAMONGA, CALIFORNIA

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Elevation: 875 meters Latitude: 34 06N Longitude: 117 14W

WEATHER

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CURRENT CONDITIONS

Sunrise/Set

08:55 am

10:35 pm
Local Time
6:53 am EDT
4 May, 2024

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MONTHLY - ALL WEATHER AVERAGES [ Show Summary ]

[ °F ] °C

TEMPERATURE

Average Temperature

Years on Record: 62

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		17.3		10.9		11.4		13.1		14.8		17.2		20.4		24.8		24.9		23.2		19.2		15.7		11.9

Average High Temperature

Years on Record: 62

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		24.2		15.8		16.8		19.3		21.7		24.6		28.9		33.9		33.8		31.5		26.2		21.4		16.8

Average Low Temperature

Years on Record: 62

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		10.3		6		6		6.9		7.9		9.8		12.1		15.6		15.9		14.8		12.2		9.9		7.1

Highest Recorded Temperature

Years on Record: 62

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		46.7		28.3		30.6		32.2		36.1		40		40.6		46.1		46.7		44.4		37.8		35.6		29.4

Lowest Recorded Temperature

Years on Record: 62

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-7.2		-6.1		-3.3		-2.8		-0.6		---		3.9		4.4		5.6		1.7		1.1		-2.2		-7.2

Average Number of Days Above 90F/32C

Years on Record: 62

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		82		---		---		0.1		1.2		3.6		10.6		22.4		23.1		15.8		4.9		0.2		---

Average Number of Days Below 32F/0C

Years on Record: 62

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		8.3		3		2.2		0.9		0.3		---		---		---		---		---		---		0.3		1.5

PRECIPITATION

Average Precipitation

Years on Record: 48

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		320		60		50		50		20		---		---		---		---		---		10		30		40

Average Number of Days With Precipitation

Years on Record: 62

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		45		6		7		7		6		3		1		---		1		1		3		4		6

Most Reported Precipitation in a Month

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		967		967		785		755		239		260		42		13		65		130		189		298		466

Most Precipitation Reported in a Day

Years on Record: 62

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		329.7		329.7		173.7		231.1		132.6		82.5		38.9		25.9		35.6		188.7		74.2		162.1		208.3

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

Years on Record: 62

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		35		5		6		6		4		2		1		---		---		1		2		3		5

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

Years on Record: 62

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		18		3		3		3		2		1		---		---		---		---		1		2		3

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

Years on Record: 62

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		10		2		2		2		1		---		---		---		---		---		---		1		2

PRECIPITATION - RAIN

Average Number of Rainy Days

Years on Record: 48

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		39		6		5		7		4		2		1		1		1		1		2		4		5

Average Number of Days With Thunderstorms

Years on Record: 48

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

Most Rain Reported in a Day

Years on Record: 48

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		100		100		50		50		40		30		10		---		40		80		40		90		90

Most Rain Reported in a Month

Years on Record: 48

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		730		280		260		200		120		60		10		10		50		90		70		200		190

PRECIPITATION - SNOW

Average Snowfall

Years on Record: 62

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		11.2		5.3		1.5		1.5		0.8		---		---		---		---		---		---		---		2

Deepest Snow Cover Reported

Years on Record: 48

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		7		7		---		---		---		---		---		---		---		---		---		---		---

Most Snow Reported in a Day

Years on Record: 48

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		23		---		1		---		---		---		---		---		---		---		---		5		16

Most Snow Reported in a Month

Years on Record: 62

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		54.6		54.6		33		17.8		25.4		---		---		---		---		---		---		---		22.9

HUMIDITY

Average Morning Relative Humidity

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		66		63		66		71		68		69		68		64		66		65		66		61		62

Average Evening Relative Humidity

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		36		36		38		44		38		39		36		29		32		35		36		36		36

Average Dew Point

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		7		---		2		5		6		9		11		13		13		12		8		2		---

Average Wet Bulb

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		12		6		7		9		11		13		16		17		17		16		13		8		6

DEGREE DAYS

Heating Degree Days

Years on Record: 62

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		343.9		91.7		70		48.9		27.2		7.8		0.6		---		---		---		4.4		23.3		70

Cooling Degree Days

Years on Record: 62

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		818.9		2.2		3.9		8.9		19.4		36.7		88.9		200.6		203.3		152.2		73.3		25		4.4

Growing Degree Days

Years on Record: 62

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		2721.1		27.6		39.2		96.4		145		222.2		313.3		458.1		461.6		395		284.2		170		60.3

SKY CONDITIONS

Average Length of Day

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hours		12.6		10.7		11.4		12.4		13.5		14.4		14.9		14.6		13.8		12.8		11.7		10.8		10.4

Average Number of Days With Fog

Years on Record: 48

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		128		8		9		13		12		15		14		8		10		11		13		8		7

Average Possibility of Clouds

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		35		40		46		49		43		44		29		17		18		28		35		37		39

WIND

Average Wind Speed

Years on Record: 12

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
km/h		17		4		4		4		4		4		4		4		4		3		3		3		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		19		11.1		14.3		19.3		23.9		27		27.2		24.9		22.7		19.9		15.7		12.3		10.3

Average Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		5		3		3.8		4.7		5.6		6.4		7.1		7.5		6.7		5.3		4.1		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		21		17		19.4		22.7		24.3		24.5		23.5		22.1		21.9		21.9		20.4		18.2		16.6

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		24.5		19.7		21.4		25.6		28.7		30.9		29.7		25.9		24.5		24.3		22.4		21.3		19.4

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		19		11.1		14.3		19.3		23.9		27		27.2		24.9		22.7		19.9		15.7		12.3		10.3

Maximum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		5.7		3.5		4.5		5.8		6.6		7.5		7.8		8.5		7.4		6.2		4.8		3.4		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		19.8		23.4		25.7		26.7		26.3		25		24.7		25.2		24.9		24.8		20.7		19.4

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		29.9		24.1		27.7		31		34		35.5		33.8		32.3		31.8		30		29.7		25.4		23.8

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		16.9		9.4		12.3		16.3		21.4		24.1		25.4		21.5		20.7		17.3		13.9		11.4		9.3

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		2.4		2.9		3.7		4.5		5.4		6.3		6.3		5.3		4.3		3		2.5		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		18.4		13.6		16.1		18.6		21.5		22		22.1		19.3		20		18.6		17.5		16.5		14.5

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		19.5		14.3		16.1		18.5		23.1		24.9		26.1		19.4		20.5		18.5		17.6		18.5		16.1

NEARBY - MAP

NEARBY - LIST

San Bernardino, California (0 mi / 1 km)
Colton, California (3 mi / 6 km)
Redlands, California (5 mi / 8 km)
Angelus Oaks, California (9 mi / 15 km)
Crestline, California (9 mi / 14 km)

GEOBA.SE

Rancho Cucamonga, California