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Ellicott City CDP, MD

ZIP 21043 — Climate & Environment

Source: U.S. Census Bureau ACS 2019–2023 5-Year Estimates. Page data updated 2026-08-02.

Upper Middle ClassLow Snow AreaRemote Work Hub

Climate, disaster risk, air quality, and environmental safety

Environment & Risk in ZIP Code 21043

Disaster Risk (FEMA NRI)

County-linked natural hazard risk from FEMA National Risk Index — useful for comparing insurance and disaster exposure.

FEMA’s National Risk Index rates natural-hazard risk for Ellicott City CDP, MD as Relatively Low (composite score 72.4), which is elevated versus much of the country. The strongest component scores on US5 are hurricane (81.2) and flood (78.1). These scores are county-linked NRI values published for planning context — all ZIP codes in the same county share the same composite score on US5. Useful when comparing insurance and disaster exposure across areas, not a substitute for a parcel-level flood or fire determination.

Overall rating
Relatively Low
Risk index
72.4
Flood risk
78.1
Wildfire risk
15.6
Hurricane risk
81.2
Earthquake risk
77.5
Tornado risk
42.2
Winter weather risk
92.7
Hail risk
72.0
Air Quality (EPA AQI)

County-level annual air quality from EPA. Good days = healthy to breathe; unhealthy = sensitive groups or worse.

36
Median AQI
77.0%
Good Days

Air quality healthy to breathe

0.0%
Unhealthy / Hazardous

Sensitive groups or worse

Climate & Weather in ZIP Code 21043

Climate normals for Ellicott City CDP, MD show little to no average snow and around 45.0 inches of annual precipitation. Pair that with FEMA NRI hazard context (overall rating Relatively Low) when evaluating long-term housing and insurance exposure.

7-day weather forecast

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Sunrise, sunset & moon

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Monthly Temperature

30-year climate normals (avg. monthly temperature)

Climate Data
Hardiness Zone
7b
Annual Snow Days
0
Annual Precipitation
45 in
FEMA NRI rating
Relatively Low

Climate & Environment key statistics

Climate statistics
Climate
Hardiness zone7b
Annual precip (in)45
Snow days0
Broadband access96.7%
Risk & Air Quality statistics
Risk & Air Quality
NRI ratingRelatively Low
NRI risk index72.4
Flood risk (NRI)78.1
Wildfire risk (NRI)15.6
Hurricane risk (NRI)81.2
IRS net migration2769
Median AQI36
Good AQI days77.0%