OAKLAND, CALIFORNIA

Average Temperature

Years on Record: 41

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		15.2		10.6		12.6		13.4		14.5		16.2		17.6		18.1		18.7		19.1		17.4		13.8		10.8

Average High Temperature

Years on Record: 41

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		19.4		14.3		16.4		17.6		18.9		20.6		22.1		22.3		22.9		23.7		22.1		17.9		14.3

Average Low Temperature

Years on Record: 41

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		11		6.9		8.6		9.4		10.1		11.8		13.1		13.8		14.4		14.4		12.8		9.7		7.2

Highest Recorded Temperature

Years on Record: 41

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		42.8		25.6		27.2		31.1		36.1		40.6		41.7		39.4		37.2		42.8		39.4		28.9		23.9

Lowest Recorded Temperature

Years on Record: 41

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-3.3		-1.1		-1.7		1.1		2.8		6.1		8.9		10.6		10		8.9		6.1		2.2		-3.3

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: 41

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		6.2		---		---		---		0.1		0.7		1.6		0.6		0.6		1.9		0.7		---		---

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		19.5		---		---		0.3		1.2		1.9		2.5		2		2.3		6.9		2.2		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		102.9		0.3		0.9		3.2		6.6		7.9		13.5		13.3		19.8		20		13.7		3.8		---

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		273.8		6.9		13.2		20		27.3		29.4		29.6		30.9		31		30		29.4		20.6		5.5

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		362		29.7		27.9		30.9		30		31		30		31		31		30		31		30		29.5

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		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		357.9		31		28		30.9		30		30.8		29.6		29.8		28.9		27.9		30.1		29.9		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		179.7		28.5		25		25.1		19.7		11.1		2.6		0.5		0.6		3.3		12.3		23.2		27.7

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		39.7		12		5.4		3.1		0.6		---		---		---		---		---		0.1		5.3		13.2

Average Number of Days Below 32F/0C

Years on Record: 41

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

Average Precipitation

Years on Record: 93

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		588		122		100		88		42		22		5		---		1		6		31		65		106

Average Number of Days With Precipitation

Years on Record: 41

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		65		11		10		10		6		3		1		---		1		1		4		8		10

Most Reported Precipitation in a Month

Years on Record: 41

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		385		316		385		250		105		76		23		30		32		39		127		246		301

Least Reported Precipitation in a Month

Years on Record: 41

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		---		8		5		1		---		---		---		---		---		---		---		5		---

Most Precipitation Reported in a Day

Years on Record: 41

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		120.4		120.4		77.5		72.9		52.6		43.9		11.2		24.1		25.4		19.8		98.3		105.4		101.3

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

Years on Record: 41

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		41		8		7		7		3		1		---		---		---		1		2		5		7

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

Years on Record: 41

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		16		3		3		3		1		---		---		---		---		---		1		2		3

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

Years on Record: 41

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

Average Precipitable Water

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm.		1.7		1.5		1.5		1.4		1.4		1.7		1.9		2		2		1.9		1.7		1.6		1.5

Average Relative Humidity

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		75.4		80.3		77.6		74.2		71.8		74		73.8		77.5		76.9		75		72.2		74.9		77

Heating Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		2873		487		363		331		233		184		103		83		57		60		152		323		497

Cooling Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		138		---		---		1		5		10		18		18		28		45		12		1		---

Growing Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		2919		42		77		144		222		291		365		400		436		435		326		142		39

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		12.4		13.7		14.7		15.3		15		14		12.8		11.6		10.6		10.1

Average Total Sky Cover

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		51.2		59.1		62.8		55.1		50.5		51.8		44.7		51.4		48.2		42.4		42.2		48.9		57.9

Average Opaque Sky Cover

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		48.8		55.3		59.2		51.9		49.2		49		43.3		49.8		46.5		40.4		41		45.6		54.4

Average Wind Speed

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
km/h		14		11.4		12.9		14.5		16.4		16.6		16.5		16.3		15.2		13.4		11.9		10.7		11.8

Average Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		18.2		7.9		11.4		16.9		22		26.1		28.8		28.3		25.4		20.6		14.9		9.6		7.2

Average Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		4.6		3		3.8		4.8		5.9		6.5		6.3		6		5.3		4.4		3.6		3		2.6

Average Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		20.2		12.6		15.7		20.5		22.7		23.8		24.7		24.9		24.9		23.8		20.9		15.2		12.2

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		24.2		13.3		17		22.4		26.2		30.2		34		33.9		31.9		28.4		23.6		16.7		13

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		18.2		7.9		11.4		16.9		22		26.1		28.8		28.3		25.4		20.6		14.9		9.6		7.2

Maximum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		5.4		3.2		4.2		5.7		7		8.5		7.8		7.1		6		5		4.1		3.4		2.8

Maximum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		23.5		16.4		22.1		26.2		25		26.4		26.3		26.9		26.9		25.9		22.9		19.1		18.4

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		30.3		18.8		27.2		32.2		31		36.5		38.5		39.4		36.5		32.3		26.7		22.8		22.1

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		15.6		5.7		8		13.9		18.6		19.3		25.3		25.7		23.9		19.3		13.3		8		5.9

Minimum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		3.7		2.6		2.6		3.2		5.1		5.2		5.4		4.8		4.3		3.6		3.1		2.4		1.9

Minimum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		16.6		7.8		9.8		16.1		18.9		17.7		22		22.8		23.4		22		18		11.7		9.2

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		17.8		6.8		8.3		15.2		18.9		16.7		26.6		28.3		28.3		25.1		19		11.6		8.9