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Northwest Harwinton CDP, CT

ZIP 06791 — Climate & Environment

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

Upper Middle ClassLow Snow Area

Climate, disaster risk, air quality, and environmental safety

Environment & Risk in ZIP Code 06791

Air Quality (EPA AQI)

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

41
Median AQI
81.8%
Good Days

Air quality healthy to breathe

2.2%
Unhealthy / Hazardous

Sensitive groups or worse

Climate & Weather in ZIP Code 06791

Climate normals for Northwest Harwinton CDP, CT show little to no average snow and around 54.3 inches of annual precipitation.

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
6a
Annual Snow Days
0
Annual Precipitation
54.25 in

Climate & Environment key statistics

Climate statistics
Climate
Hardiness zone6a
Annual precip (in)54.25
Snow days0
Broadband access96.4%
Risk & Air Quality statistics
Risk & Air Quality
IRS net migration307
Median AQI41
Good AQI days81.8%