Marysville, WA: Climate Zone, Risk and Window Requirements
ENERGY STAR groups Snohomish County into its Northern zone, which is the U-factor and SHGC target worth checking against any quote you get in Marysville. The longest-licensed window contractors based in Marysville are listed below the climate data.
Licenses checked · Washington State Department of Labor & Industries
4CIECC climate zone · ENERGY STAR Northern zone
Marysville's climate zone, in plain terms
Marysville falls in IECC climate zone 4C, and ENERGY STAR separately groups Snohomish County into its Northern zone for window certification.
Those two numbers, not the brand on the box, set the U-factor and SHGC worth checking on any quote you get in Marysville.
A Seattle-Tacoma-Bellevue, WA contractor who can't name either one on request is worth a second question before you sign.
Data: U.S. EPA / DOE, ENERGY STAR, ENERGY STAR Version 7.0 Climate Zones by County/ZIP (Windows, Doors, and Skylights) (V7.0); Pacific Northwest National Laboratory (DOE Building America), Guide to Determining Climate Zone by County: Building America and IECC 2021 Updates (PNNL-33270) (2021 IECC), from the nearest NOAA station 7.5 mi away.
What FEMA's risk data says about Marysville
FEMA scores Snohomish County's winter-weather risk as Relatively High and its flood risk as Relatively High.
Winter risk in Marysville weighs on U-factor and condensation resistance; flood risk weighs more on sill height and drainage detailing than on the glass package.
Treat these as two separate conversations with a Marysville contractor, not one.
- Strong wind
- Very Low
- Winter weather
- Relatively High
Data: FEMA, National Risk Index for Natural Hazards - County-level table, v1.20 (v1.20, December 2025).
Guides to finish before Marysville window bids come in
- How to Read an NFRC Window Label Four numbers on one sticker decide most of a window's real-world performance. Here's what each one means.
- ENERGY STAR Window Criteria by Climate Zone ENERGY STAR splits the country into four zones, each with its own numbers. Here they are, and why the Northern zone works backward from the other three.
- Impact Windows vs. Shutters in Florida's Hurricane Zones Florida gives homeowners two paths to a protected opening. Here's how each one is tested, and where the HVHZ raises the bar further.
Marysville's longest-licensed window installers
Oldest license first, newest last, pulled directly from the state's file. This list isn't for sale.
- Pacific Glass & Door INCVerify license
- Sharp Edge GlassVerify license
- Bud Barton's GlascoVerify license
- J & R GlassVerify license
- Skyline Glass LLCVerify license
- Gsu Holdings NW LLCVerify license