IRKUTSK, RUSSIA

Average Temperature

Years on Record: 159

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		31.3		-4.2		1.2		16.6		34.7		48		59.1		64.3		59.7		47.5		33.6		14.3		1.4

Average High Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		45		8.8		17.8		32.5		48.9		64.4		72.9		76.6		71.8		60.3		45.9		27		12.9

Average Low Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		24.4		-7.6		-3.6		9.9		26.8		38.1		48.6		55.2		51.4		39.6		27.1		10.8		-2.7

Highest Recorded Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		99		36.1		50.4		68		84.6		94.1		96.1		99		93.4		84.2		76.1		57.4		40.3

Lowest Recorded Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		-57.5		-57.5		-48.5		-35.1		-25.2		6.3		21.2		32.7		27.1		10.6		-22.9		-40.7		-51.3

Average Number of Days Above 70F/21C

Years on Record: 18

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		59		---		---		---		---		7		14		20		15		3		---		---		---

Average Number of Days Above 60F/15C

Years on Record: 18

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		59		---		---		---		2		15		25		29		26		13		2		---		---

Average Number of Days Below 32F/0C

Years on Record: 18

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		231		31		28		31		28		12		1		---		---		10		28		30		31

Average Number of Days Below 0F/-17C

Years on Record: 18

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		92		26		23		11		1		---		---		---		---		---		1		9		21

Average Precipitation

Years on Record: 110

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in.		16.5		0.4		0.3		0.4		0.6		1.2		2.6		3.8		3.2		1.8		0.8		0.6		0.6

Average Number of Days With Sleet

Years on Record: 30

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

Most Reported Precipitation in a Month

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		31.4		1.9		2.7		1.3		2.5		4.3		11.9		13.5		7.5		5.5		3.6		1.5		2.7

Least Reported Precipitation in a Month

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		8.2		---		---		---		---		0.2		0.4		0.5		0.8		0.2		---		---		0.1

Most Precipitation Reported in a Day

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		4.5		1		2.6		0.5		1.5		1.7		4.5		3.7		3.4		2.4		2.3		0.7		1.2

Average Number of Rainy Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		100		---		---		1		8		14		17		18		16		15		9		2		---

Average Number of Days With Thunderstorms

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		17		---		---		---		0.1		1		3		7		5		1		---		---		---

Average No. of Days With Freezing Rain

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		21		6		2		0.2		---		---		---		---		---		---		0.3		3		9

Most Rain Reported in a Month

Years on Record: 110

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in.		31.4		1.9		2.7		1.3		1.8		4.3		11.9		13.5		7.3		5.5		3.6		1.5		2.7

Least Recorded Rainfall

Years on Record: 110

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in.		8.2		---		---		---		---		0.2		0.4		0.5		0.8		0.2		---		---		0.1

Average Number of Days With Snow

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		114		20		15		12		11		3		0.1		---		---		2		10		19		22

Average Snow Cover

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		---		9.4		11		7.1		0.4		---		---		---		---		---		0.4		3.1		7.1

Deepest Snow Cover Reported

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
in		40.6		19.7		40.6		39.4		10.6		7.1		---		---		---		2.8		9.8		12.2		18.9

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		15		3		2		3		1		0.3		---		---		---		---		0.4		2		3

Av. # of Days w/Snow Depth Above 0.4in/10mm

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		152		29		26		27		5		1		---		---		---		0.3		8		26		30

Average Relative Humidity

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		72		82		75		65		57		55		55		75		78		77		73		79		84

Average Morning Relative Humidity

Years on Record: 17

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		88		86		85		85		83		81		90		95		95		94		89		88		87

Average Evening Relative Humidity

Years on Record: 17

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		59		77		65		55		44		38		47		59		60		55		57		72		81

Average Dew Point

Years on Record: 17

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
F		22		-7		-4		8		20		31		45		54		51		39		24		10		---

Heating Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		11038.5		1996.4		1635.7		1357.8		814.5		426.3		127.5		---		105.4		451.5		883.5		1383		1856.9

Cooling Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		27.9		---		---		---		---		---		---		27.9		---		---		---		---		---

Growing Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		1213.8		---		---		---		---		38.8		322.5		492.9		359.6		---		---		---		---

Average Station Pressure

Years on Record: 74

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
inHg		28.4		28.7		28.6		28.5		28.4		28.3		28.2		28.1		28.2		28.4		28.5		28.6		28.6

Average Vapor Pressure

Years on Record: 119

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

Average Length of Day

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hours		12.9		9		10.6		12.5		14.6		16.5		17.5		17		15.2		13.2		11.2		9.4		8.5

Average Monthly Sunshine

Years on Record: 118

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hours		2102.2		90.8		137.1		209		225.3		250.3		254.2		246.4		222.1		179.4		145.2		86.8		55.4

Average Number of Days With Fog

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		47		4		2		0.4		0.3		1		3		6		8		7		3		5		7

Average Number of Clear Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		12		1		2		2		1		1		---		1		1		1		1		1		---

Average Number of Cloudy Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		182		14		10		13		15		18		17		17		15		14		15		16		18

Average Number of Partly Cloudy Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		171		16		16		16		14		12		13		13		15		15		15		13		13

Average Number of Days With Smoke/Haze

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		7		0.4		1		1		0.2		1		0.4		1		0.4		---		1		1		---

Average Wind Speed

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mph		5.2		4.5		4.7		5.3		6.5		6.3		6.3		4.5		4.7		5.2		5.2		4.9		4

Average No. of Days With Blowing Dust/Sand

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		2		---		---		---		0.3		1		0.1		0.1		---		0.1		---		---		---

Average Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		3.3		1.2		2.2		3.7		4.8		5.6		5.5		5		4.3		3.3		2.2		1.3		0.9

Average Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		1.7		0.7		1.2		1.8		2.1		2.5		2.8		2.6		2.3		1.7		1.2		0.8		0.6

Average Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		3.9		2.4		3.8		5.3		5.3		5.1		4.7		4.4		4.2		3.9		3.2		2.4		2

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		3.7		2.2		3.4		4.7		5.4		5.4		4.7		4.1		3.8		3.6		2.9		2.2		1.7

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		3.3		1.2		2.2		3.7		4.8		5.6		5.5		5		4.3		3.3		2.2		1.3		0.9

Maximum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		1.7		0.7		1.2		1.9		2.1		2.6		2.8		2.7		2.3		1.8		1.3		0.8		0.6

Maximum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		4.4		2.6		4.2		5.7		5.9		5.8		5.6		5.4		4.6		4.7		3.7		2.6		2.2

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		4.5		2.4		3.8		5.2		6		6.6		6.6		6		4.5		4.7		3.5		2.4		2

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		2.9		1		2		3.4		4.5		5		4.9		4.4		3.5		2.8		1.9		1.1		0.7

Minimum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		1.6		0.6		1.1		1.7		2.1		2.5		2.7		2.6		2.2		1.6		1.1		0.7		0.5

Minimum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		3.4		2.1		3.4		4.7		4.8		4.5		4.2		3.9		3.4		3.3		2.7		2		1.6

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
kWh/m2		3		1.9		3		4.1		4.8		4.2		3.6		3		2.5		2.8		2.4		1.8		1.4