Window Climate Specs for Anaheim, CA

ENERGY STAR groups Orange County into its South-Central zone, which is the U-factor and SHGC target worth checking against any quote you get in Anaheim. The longest-licensed window contractors based in Anaheim are listed below the climate data.

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

3BIECC climate zone · ENERGY STAR South-Central zone

What zone 3B means for a Anaheim window

Los Angeles-Long Beach-Anaheim, CA runs a January average near 60°F and climbs to about 76°F by July, a swing that adds up to roughly 792 heating degree days most winters, with 1,812 on the summer cooling side of the ledger.

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

Zone 3B's requirement is the floor; Anaheim'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 4.9 mi away.

Storm and weather risk around Anaheim

Orange County's hail risk sits at Relatively Moderate and its wildfire risk at Relatively High, according to FEMA's National Risk Index.

Hail risk matters for glass and screen durability in Anaheim; wildfire risk matters more for the frame material and nearby vegetation than for the glass itself.

Either way, it's a reasonable question to bring to a Anaheim installer before you settle on a product line.

Strong wind: Relatively Moderate
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 Anaheim 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 Anaheim

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

Anaheim Glass INCWindow and glass contractor · licensed 43 years · 92805Verify license
Boudreaux's Glass And MirrorWindow and glass contractor · licensed 43 years · 92807Verify license
Anaheim Screen & GlassWindow and glass contractor · licensed 39 years · 92805Verify license
A Plus Contracting INCWindow and glass contractor · licensed 37 years · 92801Verify license
Showcase Door And WindowWindow and glass contractor · licensed 36 years · 92807Verify license
BMW BuildersWindow and glass contractor · licensed 36 years · 92807Verify license
Mako Overhead Door INCWindow and glass contractor · licensed 35 years · 92807Verify license
Specialty SidingWindow and glass contractor · licensed 33 years · 92801Verify license
Artisan Glass And Design INCWindow and glass contractor · licensed 32 years · 92801Verify license
The Glass Fixer INCWindow and glass contractor · licensed 27 years · 92806Verify license
Walker Windows LLCWindow and glass contractor · licensed 25 years · 92806Verify license
Samson Door And WindowWindow and glass contractor · licensed 25 years · 92806Verify license

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