UPPER MARLBORO, MARYLAND

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Elevation: 28 meters Latitude: 38 52N Longitude: 076 47W

WEATHER

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Daily Averages

Hourly Data

CURRENT CONDITIONS

Sunrise/Set

07:33 am

06:07 pm
Local Time
7:01 pm EDT
31 October, 2024

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MONTHLY - ALL WEATHER AVERAGES [ Show Summary ]

[ °F ] °C

TEMPERATURE

Average Temperature

Years on Record: 54

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		12.6		0.3		1.6		6.3		12.1		17.2		22		24.3		23.6		19.7		13.2		8.1		2.6

Average High Temperature

Years on Record: 54

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		18.8		5.8		7.3		12.4		18.6		23.6		28.2		30.4		29.8		26.3		20.1		14.4		8.2

Average Low Temperature

Years on Record: 54

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		6.4		-5.2		-4.1		0.1		5.6		10.8		15.8		18.2		17.4		13.2		6.2		1.8		-2.9

Highest Recorded Temperature

Years on Record: 54

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		38.9		23.9		26.7		31.7		35		36.1		37.8		38.9		38.9		37.2		33.9		29.4		26.7

Lowest Recorded Temperature

Years on Record: 54

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-24.4		-24.4		-22.2		-16.7		-7.8		-2.2		3.9		6.1		3.9		-1.1		-6.7		-10.6		-17.2

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		0.5		---		---		---		---		---		---		0.4		0.1		---		---		---		---

Average Number of Days Above 90F/32C

Years on Record: 54

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		29.4		---		---		---		0.5		1.4		5.9		10.2		8.3		2.9		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		107.5		---		0.1		0.7		3		9.3		21.9		28		26.5		14.2		3.2		0.3		0.1

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		168.6		0.4		0.6		3.3		9.8		20.5		28.3		30.9		30.7		26.4		12.9		3.9		0.9

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		228.9		2.8		3.3		10.1		20.7		28.9		30		31		31		29.8		24.8		13		3.6

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		284.1		8.4		9.4		19.8		27.9		31		30		31		31		30		30.7		23.3		11.7

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		331.9		18.1		19.7		28.1		30		31		30		31		31		30		31		29.3		22.8

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		347		31		28		31		30		30.8		26.7		22.9		25.8		28.8		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		274.3		31		28		30.9		29.2		24.9		11		3.8		6.9		18.6		29.3		29.8		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		214		30.7		27.9		29.9		24.2		11.6		1.7		0.1		0.5		6.8		22.5		27.7		30.5

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		153.3		29.4		26.3		23.3		11.5		2.1		---		---		0.2		0.9		10.7		20.7		28.1

Average Number of Days Below 32F/0C

Years on Record: 54

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		110.3		26		22.9		16.5		4		0.2		---		---		---		0.1		4.3		12.9		23.4

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		25.8		10.6		6.6		2.1		---		---		---		---		---		---		---		0.6		5.9

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		3.8		2.6		0.5		0.1		---		---		---		---		---		---		---		---		0.6

Average Number of Days Below 0F/-17C

Years on Record: 54

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		0.9		0.7		0.3		---		---		---		---		---		---		---		---		---		---

PRECIPITATION

Average Precipitation

Years on Record: 54

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		1089		78		69		92		88		100		100		105		101		99		90		83		85

Average Number of Days With Precipitation

Years on Record: 54

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		106		9		8		9		10		10		10		10		9		8		7		8		9

Most Precipitation Reported in a Day

Years on Record: 54

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm.		130.8		57.1		75.7		54.4		61		130.8		125		102.9		102.9		127		96.5		68.1		61.5

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		74.7		6		5.6		6.7		7.3		7.5		6.7		6.9		6.1		5.5		5		5.2		6.2

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

Years on Record: 54

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		77		7		6		7		7		7		7		7		6		6		5		6		6

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

Years on Record: 54

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		30		2		2		3		3		3		3		3		3		3		2		2		3

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		30.4		1.8		1.9		2.9		2.7		2.9		2.7		2.9		2.5		2.6		2.4		2.7		2.4

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

Years on Record: 54

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		11		1		---		1		1		1		1		1		1		1		1		1		1

PRECIPITATION - RAIN

Most Rain Reported in a Month

Years on Record: 54

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		1521		213		166		217		240		300		254		264		296		357		203		175		181

Least Rain Reported in a Month

Years on Record: 54

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		780		14		7		2		9		21		14		15		17		14		---		9		12

PRECIPITATION - SNOW

Average Snowfall

Years on Record: 54

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm.		45.2		15		16.8		5.8		0.2		---		---		---		---		---		0.2		0.8		6.6

Average Number of Days With Snow

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		6.8		3		2.1		0.5		---		---		---		---		---		---		---		0.1		1.1

Most Snow Reported in a Month

Years on Record: 54

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm.		133.9		71.1		86.4		45.7		5.1		---		---		---		---		---		7.6		22.9		45

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		4.5		2		1.5		0.4		---		---		---		---		---		---		---		---		0.6

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		1.9		0.7		0.8		0.2		---		---		---		---		---		---		---		---		0.2

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		0.9		0.3		0.4		0.1		---		---		---		---		---		---		---		---		0.1

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		15.7		6.3		5.9		1.2		---		---		---		---		---		---		---		0.1		2.2

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		8.8		3.2		4		0.6		---		---		---		---		---		---		---		0.1		0.9

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		5.7		2.3		2.7		0.3		---		---		---		---		---		---		---		---		0.4

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		2.4		1.2		1.1		---		---		---		---		---		---		---		---		---		0.1

DEGREE DAYS

Heating Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		4655		976		806		649		338		130		17		---		3		54		289		538		856

Cooling Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		1198		---		---		2		19		81		248		370		314		140		21		2		---

Growing Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		3806		8		9		51		181		419		681		835		776		536		226		69		15

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		12.4		13.7		14.8		15.4		15.1		14.1		12.8		11.6		10.5		10

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		13.9		7.1		9.9		13.4		16.8		19.2		20.3		20.1		17.9		15.3		12.1		8		6.2

Average 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		3		4		5.5		7.2		8.3		8.9		8.6		7.6		5.9		4.3		3.2		2.7

Average Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		15.3		11.2		13.4		15.6		17		17.6		17.8		17.9		17.3		17		16.3		12.3		10.3

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		11.3		13.4		14.7		15.8		16.9		17.4		17.6		16.4		16.6		16.6		12.6		10.4

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		13.9		7.1		9.9		13.4		16.8		19.2		20.3		20.1		17.9		15.3		12.1		8		6.2

Maximum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		5.9		3		4.1		5.7		7.4		8.6		9.1		8.8		7.8		6.3		4.6		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		18.1		13.4		16.7		18.9		19.4		20.7		20.7		19.5		19.3		19.9		20.6		15.6		12.3

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		19.6		14		18.5		19.8		20		23.1		23.6		20.8		20		21.5		23.1		17.4		13

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		11.4		6		7.9		10.8		14.5		12.7		17.1		17.9		15.8		13.1		9.8		5.9		4.8

Minimum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		5.4		2.8		3.6		5.1		6.8		7.7		8.3		8.3		7.3		5.4		3.5		2.8		2.6

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		9		9.9		12.1		14.5		11.7		15.1		16.1		15.3		14.1		12.3		8.1		7.2

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		10.1		8.3		8.6		9.7		11.8		7.2		12.1		13.9		12.9		12.2		10.8		7		6.4

NEARBY - MAP

NEARBY - LIST

Camp Springs, Maryland (5 mi / 9 km)
Andrews Air Force Base, Maryland (6 mi / 11 km)
Bowie, Maryland (6 mi / 11 km)
Glenn Dale, Maryland (7 mi / 11 km)
Washington - Northeast, District of Columbia (10 mi / 17 km)

GEOBA.SE

Upper Marlboro, Maryland