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Harwich Port CDP, MA

ZIP 02646 — Climate & Environment

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

Middle ClassLow Snow AreaRemote Work Hub

Climate, disaster risk, air quality, and environmental safety

Environment & Risk in ZIP Code 02646

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 Harwich Port CDP, MA as Relatively Moderate (composite score 89.1), which is elevated versus much of the country. The strongest component scores on US5 are hurricane (94.5) and flood (90.7). 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 Moderate
Risk index
89.1
Flood risk
90.7
Wildfire risk
53.2
Hurricane risk
94.5
Earthquake risk
78.1
Tornado risk
45.5
Winter weather risk
24.8
Hail risk
69.0
Air Quality (EPA AQI)

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

38
Median AQI
92.5%
Good Days

Air quality healthy to breathe

1.2%
Unhealthy / Hazardous

Sensitive groups or worse

Climate & Weather in ZIP Code 02646

Climate normals for Harwich Port CDP, MA show little to no average snow and around 46.3 inches of annual precipitation. Pair that with FEMA NRI hazard context (overall rating Relatively Moderate) 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
46.34 in
FEMA NRI rating
Relatively Moderate

Climate & Environment key statistics

Climate statistics
Climate
Hardiness zone7b
Annual precip (in)46.34
Snow days0
Broadband access94.8%
Risk & Air Quality statistics
Risk & Air Quality
NRI ratingRelatively Moderate
NRI risk index89.1
Flood risk (NRI)90.7
Wildfire risk (NRI)53.2
Hurricane risk (NRI)94.5
IRS net migration81
Median AQI38
Good AQI days92.5%