ALTA, CALIFORNIA

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Elevation: 1564 meters Latitude: 39 17N Longitude: 120 42W

WEATHER

Monthly - Summary

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Daily Averages

Hourly Data

CURRENT CONDITIONS

Sunrise/Set

07:30 am

06:02 pm
Local Time
4:08 pm PDT
31 October, 2024

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MONTHLY - ALL WEATHER AVERAGES [ Show Summary ]

[ °F ] °C

TEMPERATURE

Average Temperature

Years on Record: 71

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		10.4		3.2		3.4		4.1		6.7		11.2		15.8		20.3		19.8		17.3		12.2		6.6		3.9

Average High Temperature

Years on Record: 71

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		14.6		6.6		7		7.8		11		15.8		20.6		25.2		24.8		22.3		16.7		10.3		7.4

Average Low Temperature

Years on Record: 71

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		6.1		-0.3		-0.2		0.3		2.4		6.6		11		15.3		14.8		12.3		7.7		2.8		0.4

Highest Recorded Temperature

Years on Record: 65

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		36.1		21.7		22.8		22.2		27.8		31.1		33.3		35		36.1		33.9		31.1		25.6		23.9

Lowest Recorded Temperature

Years on Record: 65

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-16.1		-15		-14.4		-12.8		-8.3		-6.1		-2.2		2.2		1.7		-2.8		-8.3		-10.6		-16.1

Average Number of Days Above 90F/32C

Years on Record: 71

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		1.1		---		---		---		---		---		0.1		0.4		0.4		0.2		---		---		---

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		29.4		---		---		---		0.1		0.8		2.5		10		10		5.6		0.6		---		---

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		102.7		---		---		---		1.5		7.4		14.8		26.7		26.2		18.9		6.5		0.5		---

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		168.8		1.7		1.7		2.8		8.4		17.2		25.7		30.5		30.7		26.3		18.2		4.6		1.1

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		242.5		10.5		7.6		12.6		16.9		25.6		29.3		31		31		29.1		26.3		14.4		8.2

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		313		20.9		18.4		22.5		24.7		29.9		30		31		31		29.9		30.2		25		19.6

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		357.8		31		28		31		30		31		29.6		27.7		28.6		29		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		303.4		31		28		31		29.8		28.8		22.9		11.4		12.6		18.7		28.4		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		229.9		30.3		27.3		29.6		26.4		19.9		9.2		1.7		1.6		7.6		18.3		27.3		30.6

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		144.1		22.5		21.8		22.7		17.6		8.1		1.3		0.1		---		1.2		6.4		17.4		24.9

Average Number of Days Below 32F/0C

Years on Record: 71

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		93.3		17.5		16.2		16.6		10.9		4		0.4		---		---		0.1		2.2		9.9		15.3

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		2.8		0.7		0.5		0.2		---		---		---		---		---		---		---		0.2		1.1

PRECIPITATION

Average Precipitation

Years on Record: 71

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		1714		314		265		227		131		83		22		5		9		23		96		228		310

Average Number of Days With Precipitation

Years on Record: 71

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		91		13		12		12		10		7		3		1		1		3		6		10		13

Most Reported Precipitation in a Month

Years on Record: 71

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		1146		860		958		836		361		320		98		149		93		179		567		720		1146

Least Reported Precipitation in a Month

Years on Record: 71

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		---		19		21		34		9		2		---		---		---		---		---		---		9

Most Precipitation Reported in a Day

Years on Record: 71

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		256.5		256.5		217.7		149.9		100.3		130.3		50.3		116.6		65.8		77.7		187.2		217.4		237

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		68.4		9.5		9.6		9.1		7.2		4.2		1.3		0.2		0.6		1.8		4.6		8.4		11.9

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

Years on Record: 71

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		71		10		10		10		8		5		2		---		1		2		4		8		11

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

Years on Record: 71

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		41		7		6		6		4		2		1		---		---		1		2		5		7

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		39.5		5.4		5.8		6		3.3		2.2		0.4		0.1		0.1		0.8		2.6		5.3		7.5

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

Years on Record: 71

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		22		4		4		3		2		1		---		---		---		---		1		3		4

PRECIPITATION - RAIN

Average Number of Rainy Days

Years on Record: 49

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		90		12		11		13		10		7		3		1		1		3		6		11		12

PRECIPITATION - SNOW

Average Snowfall

Years on Record: 71

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		610.6		122.2		110.5		126.5		63.5		19.1		1.5		---		---		1		6.9		61		98.5

Average Snow Cover

Years on Record: 48

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		20		50		66		66		38		5		---		---		---		---		---		7		25

Most Snow Reported in a Month

Years on Record: 71

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		447.8		447.8		326.6		372.9		206.2		66.3		20.3		0.2		---		18.8		55.9		177.6		391.4

HUMIDITY

Average Morning Relative Humidity

Years on Record: 13

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		54		56		61		66		61		55		47		41		43		49		50		57		56

Average Evening Relative Humidity

Years on Record: 13

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		50		58		61		61		54		47		39		34		34		42		48		60		59

DEGREE DAYS

Heating Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		5326		778		719		736		589		370		154		32		34		125		338		632		818

Cooling Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		498		---		---		---		1		15		51		169		153		90		17		---		---

Growing Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		2540		15		13		23		65		191		358		603		585		427		209		42		10

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

Average Number of Clear Days

Years on Record: 31

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		174		9		8		9		10		12		19		26		25		23		16		10		9

Average Number of Cloudy Days

Years on Record: 31

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		126		17		15		17		13		11		6		1		2		3		9		15		17

Average Number of Partly Cloudy Days

Years on Record: 31

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		64		5		5		5		7		8		5		4		4		4		6		5		5

WIND

Average Wind Speed

Years on Record: 15

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
km/h		10		12		12		12		10		10		10		9		9		10		11		11		10

Highest Reported Hourly Wind Speed

Years on Record: 43

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
km/h		122.3		107.8		122.3		107.8		80.5		59.5		78.9		51.5		48.3		78.9		112.7		86.9		82.1

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

Emigrant Gap, California (4 mi / 6 km)
Nevada City - Tahoe National Forest, California (4 mi / 7 km)
Junction House, California (8 mi / 13 km)
Big Bend, California (9 mi / 15 km)
Cisco, California (9 mi / 15 km)

GEOBA.SE

Alta, California