GRASS VALLEY, CALIFORNIA

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Elevation: 801 meters Latitude: 39 16N Longitude: 121 02W

WEATHER

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CURRENT CONDITIONS

Sunrise/Set

10:31 am

09:03 pm
Local Time
10:37 pm EDT
31 October, 2024

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MONTHLY - ALL WEATHER AVERAGES [ Show Summary ]

[ °F ] °C

TEMPERATURE

Average Temperature

Years on Record: 118

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		12.2		4.7		5.8		7.3		10		13.7		17.8		21.4		20.7		17.9		13.3		8.2		5.1

Average High Temperature

Years on Record: 118

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		19.9		10.4		11.8		13.8		17.3		21.7		26.6		31.3		30.8		27.5		21.7		14.9		10.8

Average Low Temperature

Years on Record: 118

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		4.4		-0.9		-0.2		0.9		2.7		5.8		8.9		11.4		10.7		8.3		5		1.5		-0.6

Highest Recorded Temperature

Years on Record: 118

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		43.9		26.1		30		28.3		34.4		38.3		40		41.1		43.9		40.6		36.7		32.2		27.2

Lowest Recorded Temperature

Years on Record: 118

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-18.3		-18.3		-15		-11.1		-6.7		-6.1		-2.2		1.7		1.1		-2.8		-6.7		-10.6		-18.3

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		0.4		---		---		---		---		---		---		0.3		0.2		---		---		---		---

Average Number of Days Above 90F/32C

Years on Record: 118

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		39		---		---		---		---		0.7		4.5		14.3		13		5.6		0.8		---		---

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		99.1		---		---		0.1		1		5.9		15.3		27		26.3		18.4		5.1		---		---

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		160.8		0.2		0.9		2.7		8.1		17		25.7		30.5		30.6		26.6		16.8		1.8		---

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		226		4.5		6.6		12.4		17.7		26		29.2		31		31		29.3		26		10.3		1.9

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		301		16.3		16.8		23.1		26		30.3		30		31		31		29.9		30		22.6		13.9

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		355.2		28		26.1		29.9		29.6		31		30		31		31		30		31		29.4		28.1

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		364.5		31		28		31		30		31		30		30.6		30.9		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		328.7		31		28		31		30		30.2		25.8		16.9		20		24.6		30.3		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		240.5		31		28		30.8		28.4		21.6		8.6		1.4		1.4		7.6		21.3		29.4		31

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		137.1		25.5		21.9		20.7		15.4		5.2		0.7		---		---		0.3		4.9		17		25.5

Average Number of Days Below 32F/0C

Years on Record: 118

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		96.6		20		16		14.5		7.8		2		0.2		---		---		0.5		3.5		12.7		19.3

Average Number of Days Below 20F/-6C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		0.6		0.1		0.1		---		---		---		---		---		---		---		---		---		0.4

PRECIPITATION

Average Precipitation

Years on Record: 118

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		1376		261		238		201		109		56		16		1		4		19		72		159		240

Average Number of Days With Precipitation

Years on Record: 118

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		81		13		12		12		8		6		2		---		1		2		5		9		11

Most Reported Precipitation in a Month

Years on Record: 118

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		914		914		835		663		382		275		85		26		60		162		532		664		898

Least Reported Precipitation in a Month

Years on Record: 118

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		---		10		5		2		5		---		---		---		---		---		---		---		---

Most Precipitation Reported in a Day

Years on Record: 118

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		196.8		196.8		190.2		141.7		98.3		88.9		47		18.8		42.9		70.9		179.6		182.9		173.5

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		65.9		10.2		9.6		9.9		6.5		4.1		1.5		---		0.5		1.7		3.4		8.3		10.2

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

Years on Record: 118

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		61		10		10		9		6		4		1		---		---		1		4		7		9

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

Years on Record: 118

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

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		38.6		6.4		6.2		5.9		3.4		2		0.4		---		0.2		0.8		1.8		4.7		6.8

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

Years on Record: 118

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		18		4		3		3		1		1		---		---		---		---		1		2		3

PRECIPITATION - SNOW

Average Snowfall

Years on Record: 118

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		63		20.6		14.7		14.2		2.3		0.2		---		---		---		---		---		1.8		9.1

Average Number of Days With Snow

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		8		1.6		2		1.7		0.8		---		---		---		---		---		---		0.4		1.5

Average Snow Cover

Years on Record: 85

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

Most Snow Reported in a Month

Years on Record: 118

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		172.7		172.7		107.4		92		30.5		7.6		---		---		---		---		5.1		35.6		71.1

Avg. No. of Days w/Snow Above 1in/2.5cm

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		5		1		1.2		1.4		0.2		---		---		---		---		---		---		0.3		0.9

Avg. No. of Days w/Snow Above 3in/7.5cm

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		2.2		0.3		0.5		0.7		0.1		---		---		---		---		---		---		0.1		0.5

Avg. No. of Days w/Snow Above 5in/12.7cm

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		1.2		0.1		0.5		0.2		---		---		---		---		---		---		---		0.1		0.3

Avg. No. of Days w/Snowfall Above 10in/25cm

Years on Record: 30

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

Avg. # of Days w/Snow Depth Above 1in/2.5cm

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		15.4		3.7		4.9		2.2		0.8		---		---		---		---		---		---		0.6		3.2

Avg. # of Days w/Snow Depth Above 3in/7.5cm

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		7.4		1.4		2.9		1.3		0.2		---		---		---		---		---		---		0.3		1.3

Avg. # of Days w/Snow Depth Above 5in/12.7cm

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		4.8		0.9		2.2		0.6		0.1		---		---		---		---		---		---		0.1		0.9

Avg. # of Days w/Snow Depth Above 10in/25cm

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		2		0.3		1.3		0.1		---		---		---		---		---		---		---		---		0.3

DEGREE DAYS

Heating Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		4100		694		588		552		417		229		68		8		8		57		230		524		724

Cooling Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		792		---		---		---		3		32		104		253		233		135		31		---		---

Growing Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		3243		8		18		54		115		287		487		710		690		529		286		55		4

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		10.3		11.2		12.5		13.8		14.9		15.4		15.1		14.1		12.9		11.6		10.5		10

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		11.3		16.4		21.1		25.4		29		29.6		26.6		21		14.9		9.1		7.3

Average Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		4.4		2.8		3.7		4.8		6.1		6.7		6.2		5.3		4.5		4		3.4		2.9		2.4

Average Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		20.4		13.3		15.8		20.1		21.7		23.2		24.9		26.1		26.3		24.6		21.4		14.8		13.2

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		24.9		14.4		17.1		21.9		24.6		28.9		34.7		37.3		35.2		30.1		24.4		16.3		14.4

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		18.3		8		11.3		16.4		21.1		25.4		29		29.6		26.6		21		14.9		9.1		7.3

Maximum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		5.3		3		4.1		5.7		7.1		8.4		7.9		6.5		5.4		5.2		4.1		3.3		2.7

Maximum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		24		17.3		19.8		24.2		24.9		27.2		27.6		28		28.8		27		24.4		20.1		18.1

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		31.6		20.2		23.5		28.7		31.1		39		42.8		42.7		41.3		34.7		29.3		24.3		21.6

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		15.5		6.4		8.4		12.9		17.5		19.5		25		27.2		24.9		18.3		12.8		7.3		5.8

Minimum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		3.3		2.3		3		3.8		5		4.7		4.4		4		3.1		3.1		2.6		2.1		1.8

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		9.7		10.7		14.9		17.7		17.9		21.7		24		24.6		20.9		17.5		10.8		9.4

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		18.1		9.3		9.7		13.6		17		17.1		26		31.7		31.1		23.2		18.4		10.6		9.2

NEARBY - MAP

NEARBY - LIST

Nevada City, California (2 mi / 4 km)
Cedar Ridge, California (3 mi / 6 km)
Boston Ravine, California (4 mi / 7 km)
North San Juan, California (8 mi / 14 km)
French Corral, California (10 mi / 16 km)

GEOBA.SE

Grass Valley, California