Window Climate Specs for Port Orchard, WA
ENERGY STAR groups Kitsap County into its Northern zone, which is the U-factor and SHGC target worth checking against any quote you get in Port Orchard. The longest-licensed window contractors based in Port Orchard are listed below the climate data.
Licenses checked · Washington State Department of Labor & Industries
5CIECC climate zone · ENERGY STAR Northern zone
What zone 5C means for a Port Orchard window
Bremerton-Silverdale-Port Orchard, WA runs a January average near 41°F and climbs to about 66°F by July, a swing that adds up to roughly 4,825 heating degree days most winters, with 193 on the summer cooling side of the ledger.
That load is the actual argument for paying up for a better U-factor in Port Orchard, separate from anything a brochure claims.
Zone 5C's requirement is the floor; Port Orchard's specific load is what tells you whether beating that floor is worth the extra cost.
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 3.2 mi away.
Storm and weather risk around Port Orchard
FEMA scores Kitsap County's winter-weather risk as Relatively Low and its flood risk as Relatively Moderate.
Winter risk in Port Orchard 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 Port Orchard contractor, not one.
- Strong wind
- Very Low
- Winter weather
- Relatively Low
Data: FEMA, National Risk Index for Natural Hazards - County-level table, v1.20 (v1.20, December 2025).
Guides to finish before Port Orchard 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.
Window installers with the longest license records in Port Orchard
Oldest license first, newest last, pulled directly from the state's file. This list isn't for sale.
- G Customs Glass LLCVerify license
- Hop WindowsVerify license
- Rowe's Window Clenng/MaintnancVerify license