Snow Load in Massachusetts

14 counties — Average 39.3 PSF (Moderate)

10
4
Moderate (71.4%) Heavy (28.6%)
Moderate — 10 counties with 21–40 PSF. Roofs need reinforced framing to handle regular snow buildup.
Heavy — 4 counties with 41–60 PSF. Engineered roof systems required for significant snow accumulation.

Based on ASCE 7-22, the national standard for structural snow loads used by engineers and building codes across the US.

Massachusetts Snow Load Map

Counties colored by snow load classification.

Highest Snow Load Counties

Berkshire50 PSF
Essex50 PSF
Middlesex60 PSF
Worcester50 PSF
Massachusetts

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All 14 Counties — By Snow Load

CountyClassificationSnow Load
Barnstable Moderate 25 PSF
Berkshire Heavy 50 PSF
Bristol Moderate 35 PSF
Dukes Moderate 25 PSF
Essex Heavy 50 PSF
Franklin Moderate 40 PSF
Hampden Moderate 35 PSF
Hampshire Moderate 40 PSF
Middlesex Heavy 60 PSF
Nantucket Moderate 25 PSF
Norfolk Moderate 40 PSF
Plymouth Moderate 35 PSF
Suffolk Moderate 40 PSF
Worcester Heavy 50 PSF

Source: ASCE 7-22 ground snow load data

Frequently Asked Questions

What is the snow load in Massachusetts?

Massachusetts has an average ground snow load of 39.3 PSF, classified as moderate. Out of 14 counties: 10 moderate, 4 heavy.

Which Massachusetts counties have the highest snow load?

Massachusetts has 4 counties with heavy snow load (41-60 PSF). See the county table above for a complete breakdown.

How do I check snow load for my Massachusetts address?

Enter your ZIP code in the search box above to see your area's ASCE 7-22 ground snow load, classification, and roof snow load calculator.

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