BIG DELTA, ALASKA

Average Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-1.7		-18.3		-15.1		-9.9		0.1		8.7		14.2		15.7		12.7		6.6		-4.4		-14.3		-16.6

Average High Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		3		-14.6		-10.6		-4.2		5.7		14.2		19.6		20.7		17.6		11.3		-0.7		-10.6		-13

Average Low Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-6.3		-22.1		-19.5		-15.7		-5.4		3.2		8.9		10.7		7.7		1.9		-8.1		-18		-20.2

Highest Recorded Temperature

Years on Record: 68

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		33.3		12.2		10.6		14.4		22.2		32.2		33.3		32.8		32.2		26.1		23.3		11.1		12.8

Lowest Recorded Temperature

Years on Record: 68

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-52.8		-52.8		-51.1		-45		-38.3		-18.3		-3.3		---		-5.6		-18.9		-39.4		-43.9		-52.2

Average Heat Index Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-0.3		-16.6		-13.7		-8.2		1.6		10		15.7		17.1		14		7.7		-3.7		-13.5		-15.6

Average Wind Chill Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-3.9		-24.4		-20.2		-13.3		-1.4		8.9		15.5		16.9		13.7		6.2		-7.4		-19.3		-22.6

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		3.6		---		---		---		---		0.1		1.1		1.5		0.9		---		---		---		---

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		34.2		---		---		---		---		1.9		10.9		15		6.2		0.2		---		---		---

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		92.5		---		---		---		0.8		11.6		24.6		27.6		21.4		6.3		0.2		---		---

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		144.4		---		---		0.2		6.7		25.5		29.8		30.8		29.9		19.6		1.7		0.1		0.1

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		182		0.8		1.1		3.8		19.2		30.3		30		31		30.9		26.4		6.9		0.8		0.9

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		363.5		31		28		31		30		31		29.4		30.6		30.6		30		31		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		324.7		31		28		31		30		29.7		19.2		11.6		23.2		29		30.9		30		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		258.9		31		28		31		29.6		19.9		1.8		0.3		5.2		20.9		30.2		30		31

Average Number of Days Below 32F/0C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		218.5		31		27.7		30		24.7		6.1		0.2		---		0.7		9.9		27.6		29.8		30.8

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		163.5		29.3		25.2		25.5		9.6		0.2		---		---		---		1.4		16		27.3		29

Average Number of Days Below 10F/-12C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		124.5		24.7		20.4		19.5		4.4		---		---		---		---		0.2		7.9		22.3		25

Average Number of Days Below 0F/-17C

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		83.9		19.1		13.9		12		1.9		---		---		---		---		---		3.3		15.3		18.3

Average Precipitation

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		294.6		7.6		7.6		5.1		5.1		22.9		58.4		68.6		48.3		25.4		20.3		15.2		10.2

Average Number of Days With Precipitation

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		96.8		5.6		5.3		3.5		3.6		7.5		12.2		14.3		12.4		8.8		9.1		8		6.5

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		34.8		0.9		1.5		0.4		0.6		2.9		6.7		7.1		5.6		3.1		2.6		1.9		1.5

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		4.3		---		---		---		0.1		0.4		1		1.6		0.8		0.4		---		---		---

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

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		0.8		---		---		---		---		0.1		0.2		0.3		0.1		0.1		---		---		---

Average Precipitable Water

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm.		0.8		0.4		0.4		0.4		0.6		0.9		1.4		1.7		1.5		1.1		0.7		0.5		0.4

Average Number of Rainy Days

Years on Record: 33

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		92		6		4		4		4		7		12		14		12		9		9		7		6

Average Number of Days With Thunderstorms

Years on Record: 34

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

Most Rain Reported in a Month

Years on Record: 47

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		440		30		30		20		40		70		130		150		90		70		50		70		60

Least Recorded Rainfall

Years on Record: 47

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		150		---		---		---		---		---		10		10		10		---		---		---		---

Average Snowfall

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		137.7		14.7		16.3		7.9		7.1		2.8		---		---		---		5.6		33		33.3		17

Average Number of Days With Snow

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		49		6.6		6.5		4.6		2.5		0.4		---		---		---		1.5		9.7		10		7.2

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		22.9		2.5		3		1.5		0.8		0.3		---		---		---		0.9		5.2		5.2		3.5

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		4.3		0.2		0.6		0.1		0.2		0.1		---		---		---		0.2		1.2		1.4		0.3

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		---		0.1		---		0.1		0.1		---		---		---		0.2		0.2		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		0.2		---		---		---		0.1		---		---		---		---		---		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		192.4		31		27.7		30.1		19.6		1.8		---		---		---		2.4		20.4		28.6		30.8

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		129.4		23.4		20.3		18.3		6.4		0.4		---		---		---		1.1		13.7		21.9		23.9

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		75.2		10.1		11.7		11.3		4.5		0.1		---		---		---		0.9		7.7		14.5		14.4

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		25.9		1.6		6.3		4.8		1.4		---		---		---		---		0.5		1.4		5.9		4

Average Relative Humidity

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		62.9		67.6		65.4		57.1		49.2		48		54.6		62.8		67.1		66.9		74.7		72.1		68.8

Average Morning Relative Humidity

Years on Record: 18

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		69		63		65		65		67		60		66		73		78		77		77		68		65

Average Evening Relative Humidity

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		56		62		60		52		47		38		45		50		52		55		69		69		66

Average Dew Point

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-7.9		-21.4		-19.3		-16.2		-9.1		-2.2		4.3		7.7		5.8		0.1		-8.1		-17.7		-20.1

Heating Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		13157		2047		1681		1578		983		540		231		161		321		635		1268		1762		1950

Cooling Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		26		---		---		---		---		---		9		12		5		---		---		---		---

Growing Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		809		---		---		---		1		54		235		318		171		28		1		---		---

Average Sea Level Pressure

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mbar		1011.2		1012		1013.6		1012.5		1010.6		1011.6		1011.1		1012.9		1012.3		1009.8		1008.7		1009.8		1009.8

Average Length of Day

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hours		13.6		6.8		9.6		12.7		16.2		20		22.5		20.6		17.3		13.7		10.5		7.5		5.7

Average Number of Days With Fog

Years on Record: 34

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		66		9		7		5		3		2		2		3		4		6		9		8		8

Average Number of Clear Days

Years on Record: 3

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		60		14		5		8		2		2		4		---		2		5		4		7		7

Average Number of Cloudy Days

Years on Record: 3

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		212		9		16		15		19		18		17		23		21		18		22		17		17

Average Number of Partly Cloudy Days

Years on Record: 3

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		93		8		7		8		9		11		9		8		8		7		5		6		7

Average Percent Chance - Scattered Clouds

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		12.6		11.3		10.5		11.8		14.1		14.6		16.4		15.4		11.4		13.1		10.1		10.8		11.8

Average Percent Chance - Few Clouds

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		10.2		11.1		10.6		12.7		12.8		10.1		10.5		8.6		8.2		8.5		7.7		9.4		11.5

Average Percent Chance - Broken Clouds

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		26.6		22.2		23.1		23.3		27.9		35		34.2		32.7		31.1		27.6		20.9		20.1		20.7

Average Percent Chance - Overcast Skies

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		39.9		36.4		36.8		30.7		33.7		34.3		35.1		39.9		45.4		45.7		54.4		44.6		41

Average Total Sky Cover

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		64.4		57.8		58.3		54.9		60.8		66.5		65.3		70		75.8		70.8		72		63.4		59.8

Average Opaque Sky Cover

Years on Record: 20

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		51.9		46.3		45.7		42.3		44.8		51.1		52.8		57		63.6		57.3		59.8		52.5		49

Average Wind Speed

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
km/h		14.3		19.8		17.4		15.1		13.4		12.9		11.4		10		10.5		12.7		13.5		16.6		19

Highest Reported Hourly Wind Speed

Years on Record: 39

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
km/h		119.1		119.1		107.8		101.4		96.6		90.1		82.1		101.4		75.6		106.2		93.3		90.1		101.4

Average Percent Chance - Calm Winds

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
%		18.4		21.6		19.2		16.4		14.5		12.9		14.3		16.6		19.7		18.7		21.7		24		21.8

Average Primary Wind Direction

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
°		194.7		135		135		165.7		239.3		262.6		277.5		287.2		251.9		169.6		138.4		135		135

Average Secondary Wind Direction

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
°		272		192.6		243.7		284.1		279.7		276.5		300.6		308.3		285.9		296.2		313.1		271.5		211

Average Wind Vector Direction

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
°		157.9		111.2		113.2		131.8		181.2		203.8		223.4		232.2		193.1		153.4		123.2		113.1		112.2

Average Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		9.5		0.5		2.8		8.2		15.1		19.4		20.9		18.5		14		9		4.2		1		0.1

Average Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		4.8		0.4		1.9		4.6		7		8.9		9.1		9.4		7.9		4.9		2.7		0.8		0.1

Average Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		11.2		2.2		6.5		14.1		19.9		18.3		17.9		16.3		14.2		12.2		8.6		3.5		0.7

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		12.3		1.8		5.9		12.8		20.4		23.4		26		19.9		14.4		12.2		7.5		3.2		---

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		9.5		0.5		2.8		8.2		15.1		19.4		20.9		18.5		14		9		4.2		1		0.1

Maximum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		4.9		0.4		2		4.9		7.2		8.9		9.2		9.5		7.9		5.2		3		0.8		0.1

Maximum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		12.9		2.7		7.4		16.3		21.7		20.6		19.8		18.7		18.2		14.7		10.2		3.8		0.7

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		---		2.3		6.8		15.2		23		28.4		30.5		25.3		21.6		15.4		9		3.6		---

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		8.2		0.5		2.6		6.9		13.7		16.4		18.6		16.1		12.2		7.3		3.6		0.9		0.1

Minimum 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		0.4		1.7		4.1		6.9		8.8		8.9		9.3		7.8		4.5		2.4		0.6		0.1

Minimum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		9.4		1.8		5.7		11.2		17.8		15.1		15.8		14.1		12		9.3		6.7		2.8		0.7

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		---		1.5		5		9.6		17.2		16.8		21.5		14.9		10.4		8.3		6		2.6		---