LEWISTON, IDAHO

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Elevation: 1440 feet Latitude: 46 22N Longitude: 117 01W

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MONTHLY - ALL WEATHER AVERAGES [ Show Summary ]

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TEMPERATURE

Average Temperature

Years on Record: 62

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		53.8		33.4		38.1		44.7		53.5		61.1		66.9		75.9		74.4		65.3		53.5		41.6		36.6

Average High Temperature

Years on Record: 62

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		66.3		40.9		47.3		56.1		67		75.7		81.4		93.2		92.3		81.4		66.6		50.4		43.1

Average Low Temperature

Years on Record: 62

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		41.2		26		29		33.3		39.9		46.5		52.5		58.6		56.5		49.2		40.3		32.7		29.6

Highest Recorded Temperature

Years on Record: 62

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		117		65		70		78		99		104		109		117		111		108		94		75		65

Lowest Recorded Temperature

Years on Record: 62

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		-21		-21		-13		7		22		26		35		41		41		29		16		-2		5

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		57.7		---		---		---		0.2		2.7		6		21.4		20.4		6.8		0.2		---		---

Average Number of Days Above 65F/18C

Years on Record: 48

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		164		---		---		3		11		22		28		31		31		27		13		---		---

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		95.1		22		18.1		13.1		2.8		0.2		---		---		---		0.2		4.6		14.2		19.8

Average Number of Days Below 5F/-15C

Years on Record: 48

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

Average Number of Days Below 0F/-17C

Years on Record: 62

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		1.9		1.4		0.4		---		---		---		---		---		---		---		---		0.1		---

PRECIPITATION

Average Precipitation

Years on Record: 62

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		13.2		1.2		1		1		1.1		1.4		1.6		0.5		0.3		1		1.3		1.4		1.4

Average Number of Days With Precipitation

Years on Record: 62

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		91		10		8		9		8		8		8		3		3		5		8		11		10

Most Reported Precipitation in a Month

Years on Record: 62

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		4.4		3.6		2.5		2		1.9		3.5		4		1.9		1.5		4.4		3.2		4.2		2.5

Least Reported Precipitation in a Month

Years on Record: 62

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		---		0.3		0.2		0.3		0.2		0.4		0.1		---		---		---		---		0.1		0.3

Most Precipitation Reported in a Day

Years on Record: 62

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		1.6		1.4		1		1		0.9		1.6		1.4		0.8		0.9		1.4		1.1		1		0.9

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		43		4		3		3		4		4		5		2		1		3		4		5		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		4		---		---		---		---		1		1		---		---		1		1		---		---

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

Years on Record: 62

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Days

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PRECIPITATION - RAIN

Average Number of Rainy Days

Years on Record: 47

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		103		11		9		11		10		10		9		5		4		5		8		11		11

Average Number of Days With Thunderstorms

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		25		---		---		---		2		3		6		7		5		2		---		---		---

Most Rain Reported in a Month

Years on Record: 48

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in.		18.6		3.5		2		2.7		3.3		4.8		4.7		2.6		3		2.2		2.8		2.8		3.3

Least Recorded Rainfall

Years on Record: 48

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in.		8.4		0.1		0.2		0.3		---		0.3		0.2		---		---		---		---		0.2		0.1

PRECIPITATION - SNOW

Average Snowfall

Years on Record: 62

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		9		4.3		2.4		0.2		---		---		---		---		---		---		---		0.3		1.8

Average Snow Cover

Years on Record: 35

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in.		1		4		3		---		---		---		---		---		---		---		---		---		3

Most Snow Reported in a Month

Years on Record: 62

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		29.8		29.8		15.4		2		0.4		---		---		---		---		---		---		2.5		5

HUMIDITY

Average Morning Relative Humidity

Years on Record: 42

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		72		81		80		77		71		68		64		55		55		66		80		83		82

Average Evening Relative Humidity

Years on Record: 44

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		48		71		62		49		42		39		35		25		25		32		49		69		74

Average Dew Point

Years on Record: 33

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		36		25		29		31		34		41		46		46		44		42		38		33		28

DEGREE DAYS

Heating Degree Days

Years on Record: 62

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		2673		669		476		322		99		20		1		---		---		8		105		401		572

Cooling Degree Days

Years on Record: 62

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		882		---		---		---		3		39		111		341		296		89		3		---		---

Growing Degree Days

Years on Record: 62

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		3082.9		---		---		---		105		344.1		507		802.9		756.4		459		108.5		---		---

VISIBILITY

Average Number of Days With Fog

Years on Record: 10

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		55		10		9		4		1		1		1		---		1		1		6		8		13

Average Number of Clear Days

Years on Record: 42

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		91		3		2		4		5		6		8		18		16		13		9		3		3

Average Number of Cloudy Days

Years on Record: 42

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		196		24		21		21		19		16		13		6		7		9		15		22		24

Average Number of Partly Cloudy Days

Years on Record: 42

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		78		4		5		6		6		9		9		7		8		8		7		5		4

WIND

Average Wind Speed

Years on Record: 32

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mph		8		6		8		8		6		10		9		9		9		5		6		6		8

NEARBY - MAP

NEARBY - LIST

Clarkston Heights, Washington (1 mi / 2 km)
Uniontown, Washington (1 mi / 1 km)
Clarkston, Washington (3 mi / 5 km)
Asotin, Washington (16 mi / 25 km)
Anatone, Washington (18 mi / 29 km)

GEOBA.SE

Lewiston, Idaho

WEATHER FORECAST