Window Climate Specs for Santa Rosa, CA

Local risk and climate data for Santa Rosa, CA are below, translated into plain terms for a window buyer rather than left as raw codes. Use it to check a proposed spec before you sign, not just to browse.

Licenses checked September 30, 2026 · California Contractors State License Board

3CIECC climate zone · ENERGY STAR South-Central zone

What zone 3C means for a Santa Rosa window

Santa Rosa-Petaluma, CA runs a January average near 49°F and climbs to about 67°F by July, a swing that adds up to roughly 2,627 heating degree days most winters, with 442 on the summer cooling side of the ledger.

That load is the actual argument for paying up for a better U-factor in Santa Rosa, separate from anything a brochure claims.

Zone 3C's requirement is the floor; Santa Rosa'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 0.8 mi away.

Storm and weather risk around Santa Rosa

Neither rating changes a window's energy label, but both are exactly what impact-resistance and design-pressure ratings are built to answer for a Santa Rosa home.

Ask specifically about design pressure and impact rating for Santa Rosa, not just energy performance, if either risk rating comes back on the high side.

Strong wind: Very Low
Winter weather: Very Low

Data: FEMA, National Risk Index for Natural Hazards - County-level table, v1.20 (v1.20, December 2025).

Guides to finish before Santa Rosa 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 Santa Rosa

Oldest license first, newest last, pulled directly from the state's file. This list isn't for sale.

Dee Jays Sash & Glass INCWindow and glass contractor · licensed 50 years · 95402Verify license
Jack Smith Glass And Sash INCWindow and glass contractor · licensed 43 years · 95401Verify license
Precision Build CorporationWindow and glass contractor · licensed 36 years · 95401Verify license
Cabot And CompanyWindow and glass contractor · licensed 35 years · 95409Verify license
C C IWindow and glass contractor · licensed 33 years · 95405Verify license
Thomson Window ServiceWindow and glass contractor · licensed 30 years · 95403Verify license
Sonoma Shower Doors INCWindow and glass contractor · licensed 21 years · 95407Verify license
Invision Sash & Glass INCWindow and glass contractor · licensed 20 years · 95403Verify license
Nor Cal Glass Products INCWindow and glass contractor · licensed 16 years · 95404Verify license
Santa Rosa GlassWindow and glass contractor · licensed 13 years · 95405Verify license
B & L GlassWindow and glass contractor · licensed 6 years · 95403Verify license
Road Runner Glass & GlazingWindow and glass contractor · licensed 2 years · 95405Verify license

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