Rocky Ridge, MD 21778 (District 4)

Welcome to Rocky Ridge, MD 21778 (District 4).

Rocky Ridge, MD 21778 (District 4) resides in Frederick County.

Typical household income hovers between $55,000 to $70,000 in 21778. This ZIP code is considered relatively affordable in the state of Maryland. Population declined 14% in the past five years.

This ZIP code is in a suburban neighborhood in the Washington-Arlington-Alexandria, DC-VA-MD-WV metropolitan area. It is highly sparsely populated with 50 to 100 residents per square mile.

Key Cost Indexes

Index Name	ZIP Code	County	State
Wealth Overall 1-100 (wealthiest)	86	94	93
Cost of Living 1-100 (costliest)	81	94	92
Earnings Power 1-100 (highest pay)	43	98	97
Tax Friendliness 1-100 (friendliest)	48	51	51
Retail Power 1-100 (strongest)	65	96	96
K-12 Resources 1-100 (most resourceful)	81	86	97
Inequality 1-100 (most unequal)		10	57
*See FAQ for index definitions.*

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Economic Significance

Indicator Name	As % County Total	As % State Total
Total population	<1%	<0.1%
Voter population	<1%	<0.1%
Privately-owned homes	<1%	<0.1%
Value of all homes	<1%	<0.1%
Value of all mortgage-free homes	<1%	<0.1%
Total real estate taxes	<1%	<0.1%
Total income	<1%	<0.1%
Total workers	<1%	<0.1%
Total wages and salaries	<1%	<0.1%
Total vehicles	<1%	<0.1%
Total retails
*See FAQ for indicator definitions.*


Public Safety Record
Crime	Washington DC Metro	State of MD
Violent Crimes	4	4
Murder	3	5
Rape	4	1
Robbery	5	5
Assault	3	4
Property Crimes	3	3
Burglary	2	2
Larceny	3	3
Auto Theft	3	3
Locations without crime statistics display public safety record of nearby places or metro areas as references; Locations marked with * display crime scale estimates for similar neighborhoods.	Crime scale among places Blank: Not applicable/ No rating/ Insufficient data 1: Very low 2: Relatively low 3: Relatively moderate 4: Relatively high 5: Very high	Crime scale among states Blank: Not applicable/ No rating/ Insufficient data 1: Very low 2: Relatively low 3: Relatively moderate 4: Relatively high 5: Very high
*See FAQ for crime rating and scale definitions.*

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Climate


Average Weather
Month	Temperature (°F)	Precipitation (in”)
January	33.7	1.84
February	32.5	3.92
March	45.9	2.59
April	54.1	2.89
May	61	3.63
June	72	4.42
July	75.8	4.28
August	76.1	4.77
September	68	9.67
October	61.4	2.97
November	42.5	1.04
December	41.6	0.8

Type of Weather: Cfa
Type	Description	Examples
Af	Tropical rainforest	Palm Beach, FL Kahului, HI
Am	Tropical monsoon	Miami
As	Tropical dry summer	Honolulu
Aw	Tropical dry winter	Key West, FL Naples, FL
BSh	Hot semi-dry	Scottsdale, AZ
BSk	Cold semi-dry	San Diego Colorado Springs
BWh	Hot desert climate	Phonenix
BWk	Cold desert climate	Las Vegas
Cfa	Humid subtropical	Virginia Beach Dallas, TX New York City
Cfb	Subtropical highland/ Temperate oceanic	Mystic, CT
Cfc	Subpoloar oceanic	Spots of Alaska
Csa	Hot-summer Mediterranean	Newport Beach
Csb	Warm-summer Mediterranean	Seattle San Francisco
Dfa	Hot-summer humid continental	Boston Chicago
Dfb	Warm-summer humid continental	Maine Park City, UT
Dfc	Subarctic	Most of Alaska
Dsb	Mediterranean-influenced warm-summer humid continental	Boise, Idaho
Dsc	Mediterranean-influenced subarctic	Pruodoe Bay, AK

USDA Plant Hardiness Zone for ZIP Code 21778: 7a
	Average annual Minimum Extreme Temperature
Zone	From °F (°C)	To °F (°C)
0a		< −65 °F (−53.9 °C)
0b	−65 °F (−53.9 °C)	−60 °F (−51.1 °C)
1a	−60 °F (−51.1 °C)	−55 °F (−48.3 °C)
1b	−55 °F (−48.3 °C)	−50 °F (−45.6 °C)
2a	−50 °F (−45.6 °C)	−45 °F (−42.8 °C)
2b	−45 °F (−42.8 °C)	−40 °F (−40 °C)
3a	−40 °F (−40 °C)	−35 °F (−37.2 °C)
3b	−35 °F (−37.2 °C)	−30 °F (−34.4 °C)
4a	−30 °F (−34.4 °C)	−25 °F (−31.7 °C)
4b	−25 °F (−31.7 °C)	−20 °F (−28.9 °C)
5a	−20 °F (−28.9 °C)	−15 °F (−26.1 °C)
5b	−15 °F (−26.1 °C)	−10 °F (−23.3 °C)
6a	−10 °F (−23.3 °C)	−5 °F (−20.6 °C)
6b	−5 °F (−20.6 °C)	0 °F (−17.8 °C)
7a	0 °F (−17.8 °C)	5 °F (−15 °C)
7b	5 °F (−15 °C)	10 °F (−12.2 °C)
8a	10 °F (−12.2 °C)	15 °F (−9.4 °C)
8b	15 °F (−9.4 °C)	20 °F (−6.7 °C)
9a	20 °F (−6.7 °C)	25 °F (−3.9 °C)
9b	25 °F (−3.9 °C)	30 °F (−1.1 °C)
10a	30 °F (−1.1 °C)	35 °F (1.7 °C)
10b	35 °F (1.7 °C)	40 °F (4.4 °C)
11a	40 °F (4.4 °C)	45 °F (7.2 °C)
11b	45 °F (7.2 °C)	50 °F (10 °C)
12a	50 °F (10 °C)	55 °F (12.8 °C)
12b	55 °F (12.8 °C)	60 °F (15.6 °C)
13a	60 °F (15.6 °C)	65 °F (18.3 °C)
13b	> 65 °F (18.3 °C)

Time Zone for ZIP Code 21778: 3
Time Zone	Abbreviation	Name
1	AKS	Alaskan Standard Time
2	CST	Central Standard Time
3	EST	Eastern Standard Time
4	HST	Hawaii-Aleutian Standard Time
5	MST	Mountain Standard Time
6	PST	Pacific Standard Time

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