Snow Load in Washington

39 counties — Average 15.7 PSF (Light)

Light (35.9%) Case Study (64.1%)

Light — 14 counties with 1–20 PSF. Standard roof construction is typically sufficient.

Case Study — 25 counties where snow loads vary too much to assign one number. A licensed engineer must determine the load for your specific site.

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

Washington Snow Load Map

Counties colored by snow load classification.

Washington

Source: ASCE 7-22 ground snow load data

What is the snow load in Washington?

Washington has an average ground snow load of 15.7 PSF, classified as light. Out of 39 counties: 14 light, 25 case study.

Which Washington counties have the highest snow load?

25 counties require a site-specific case study. See the county table above for a complete breakdown.

How do I check snow load for my Washington 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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