CHELSEA, MONTANA

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Elevation: 607 meters Latitude: 48 05N Longitude: 105 38W

WEATHER

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Daily Averages

Hourly Data

CURRENT CONDITIONS

Sunrise/Set

07:10 am

04:24 pm
Local Time
1:40 am MST
15 November, 2024

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MONTHLY - ALL WEATHER AVERAGES [ Show Summary ]

[ °F ] °C

TEMPERATURE

Average Temperature

Years on Record: 106

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		6.6		-10.9		-6.8		0.1		7.9		13.9		18.8		22.7		21.4		14.9		7.8		-1.3		-9.1

Average High Temperature

Years on Record: 106

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		14.2		-4.8		-0.6		7.3		16.1		21.8		26.8		31.6		30.1		23.6		15.8		5.2		-2.8

Average Low Temperature

Years on Record: 106

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-0.9		-17.1		-13.2		-6.9		-0.1		5.9		10.8		13.8		12.7		6.2		-0.2		-7.9		-15.3

Highest Recorded Temperature

Years on Record: 106

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		44.4		15.6		21.7		27.2		35		38.9		44.4		41.7		42.8		40.6		33.9		23.3		15.6

Lowest Recorded Temperature

Years on Record: 106

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-42.2		-41.1		-38.9		-35		-16.7		-7.2		0.6		---		1.1		-10		-23.3		-29.4		-42.2

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		4.3		---		---		---		---		---		0.6		1.9		1.6		0.3		---		---		---

Average Number of Days Above 90F/32C

Years on Record: 106

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		38.2		---		---		---		0.1		1.4		5.5		15.6		12.5		3.1		0.1		---		---

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		85.7		---		---		---		1.6		6.6		13.5		27.2		24.4		10.7		1.7		---		---

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		139.7		---		0.1		1		8.1		16.1		25.3		30.4		29.9		20.6		7.8		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		187.3		---		0.4		5.2		16.6		26.9		29.4		30.9		30.9		27		16.3		3.8		---

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		228.9		0.6		2.8		12.7		24.7		30.1		30		31		31		29.4		25		10.5		1.3

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		272.8		5.6		9.4		21.2		28.8		30.8		30		31		31		30		28.9		19		7.2

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		363		31		28		31		30		31		29.4		30.3		30.3		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		340		31		28		31		30		30.6		25.9		20.1		22.1		29.4		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		281.3		31		28		31		29.7		25.2		12.1		3.5		6.2		23.2		30.5		29.9		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		224.4		31		28		30.7		25.2		11.9		1.2		0.1		0.3		9.3		26.3		29.4		31

Average Number of Days Below 32F/0C

Years on Record: 106

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		180.1		30.1		27.7		27.4		15.8		3.3		---		---		---		3.1		15.6		26.8		30.3

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		103.9		26.7		20.1		12		2.5		0.1		---		---		---		0.2		2.5		13.7		26.1

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		59.5		18.4		13.2		4.7		0.2		---		---		---		---		---		0.4		5.7		16.8

Average Number of Days Below 0F/-17C

Years on Record: 106

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		37.9		13.4		7.9		2.7		---		---		---		---		---		---		0.2		2.9		10.8

PRECIPITATION

Average Precipitation

Years on Record: 106

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		343		10		7		13		18		48		85		49		45		34		17		8		9

Average Number of Days With Precipitation

Years on Record: 106

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		45		2		2		2		3		6		8		6		5		4		2		2		3

Most Reported Precipitation in a Month

Years on Record: 106

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		192		43		31		57		58		180		192		189		143		123		53		44		33

Least Reported Precipitation in a Month

Years on Record: 106

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

Most Precipitation Reported in a Day

Years on Record: 106

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		72.1		21.1		21.1		50.8		33.5		50		72.1		67.6		51		58.4		35.6		16.3		22.6

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		32.3		1.5		0.7		1.5		2		4.2		6.5		4.3		3.7		3		2.3		1.3		1.3

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

Years on Record: 106

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		31		1		1		1		2		4		7		4		4		3		2		1		1

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

Years on Record: 106

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

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		8.8		0.2		0.1		0.3		0.4		1.3		2.2		1.6		1.2		0.8		0.5		0.2		---

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

Years on Record: 106

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

PRECIPITATION - SNOW

Average Snowfall

Years on Record: 106

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		38.6		7.6		5.1		6.1		1.3		1		---		---		---		0.5		1.8		5.1		10.2

Average Number of Days With Snow

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		6.2		1.4		1.1		0.8		0.3		0.1		---		---		---		---		0.3		0.6		1.6

Average Snow Cover

Years on Record: 49

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		2		12		12		7		---		---		---		---		---		---		---		---		5

Most Snow Reported in a Month

Years on Record: 106

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		43.2		35.6		38.1		40.6		17.8		35.6		---		---		---		12.7		17.8		25.4		43.2

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		4.9		1.2		0.8		0.6		0.1		0.1		---		---		---		---		0.2		0.6		1.3

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		1.5		0.2		0.2		0.3		0.1		---		---		---		---		---		0.1		0.2		0.4

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		0.5		0.1		---		0.2		---		---		---		---		---		---		---		---		0.2

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		44.6		18.2		8.3		4		0.2		0.1		---		---		---		---		0.2		2.2		11.4

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		34.1		14.9		6.9		3.3		---		0.1		---		---		---		---		0.2		1.2		7.5

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		25.7		10.8		5.9		2.9		---		0.1		---		---		---		---		0.1		0.8		5.1

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		10.4		3.9		3.3		2.1		---		---		---		---		---		---		---		---		1.1

DEGREE DAYS

Heating Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		8034		1562		1246		989		554		273		83		11		24		207		582		1015		1488

Cooling Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		674		---		---		---		2		24		102		266		231		46		2		---		---

Growing Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		2578		---		---		7		72		247		470		720		672		313		70		6		---

SKY CONDITIONS

Average Length of Day

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hours		12.8		9.5		10.8		12.5		14.3		15.9		16.7		16.2		14.8		13		11.3		9.8		9

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		13.6		4.8		8.2		12.5		17.6		20.9		22.1		23.5		19.7		14.5		9.4		5.6		4

Average Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		6.1		2.8		4.2		6.2		7.6		8.9		9.5		9.2		8		6.5		4.7		3.2		2.5

Average Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		15.1		8.3		12.8		15.9		18.6		19.2		19.1		20.9		19.7		17		13		9.6		7.5

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		15		7.5		11.2		13.9		18.5		20.2		20.8		23.7		20.6		16.3		12.3		8.3		6.7

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		13.6		4.8		8.2		12.5		17.6		20.9		22.1		23.5		19.7		14.5		9.4		5.6		4

Maximum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		6.4		3.1		4.5		6.6		7.7		9.1		9.7		9.7		8.1		7.1		5		3.5		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		17.1		9.6		14		18.2		21.1		21.7		21.7		23.2		21.4		20.1		14.6		10.9		8.9

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		17.8		8.9		12.5		16.9		22.2		24.6		25.7		27.1		23.2		20.2		14		9.9		8.2

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		11.1		4		6.8		10.3		14.9		17.2		18.5		17.9		16.7		10.9		8.4		4.4		3.3

Minimum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		5.8		2.5		3.7		5.7		7.5		8.8		9.4		9.1		7.9		5.9		4.3		2.7		2.1

Minimum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		12.1		6.5		10.3		13		15.3		15.7		16		15.9		16.4		12.2		11.4		7.1		5.8

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		10.6		5.7		8.7		10.1		13.3		13.6		14.5		14.3		15.2		10.2		10.6		5.8		4.9

NEARBY - MAP

NEARBY - LIST

Four Buttes, Montana (3 mi / 4 km)
Wolf Point, Montana (4 mi / 7 km)
Vida, Montana (17 mi / 28 km)
Charles M. Russell National Wildlife Refuge, Montana (18 mi / 29 km)
Poplar, Montana (20 mi / 33 km)

GEOBA.SE

Chelsea, Montana