Torrance, CA: Climate Zone, Risk and Window Requirements

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

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

3BIECC climate zone · ENERGY STAR South-Central zone

Torrance's climate zone, in plain terms

Los Angeles-Long Beach-Anaheim, CA runs a January average near 57°F and climbs to about 69°F by July, a swing that adds up to roughly 1,433 heating degree days most winters, with 523 on the summer cooling side of the ledger.

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

Zone 3B's requirement is the floor; Torrance'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 1.1 mi away.

What FEMA's risk data says about Torrance

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 Torrance home.

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

Strong wind: Relatively Moderate
Winter weather: Relatively Moderate

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

Guides to finish before Torrance 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.

Torrance's longest-licensed window installers

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

Dandoy Glass Company INCWindow and glass contractor · licensed 48 years · 90501Verify license
Sinbad Flooring INCWindow and glass contractor · licensed 43 years · 90505Verify license
Ideal Glass & Mirror INCWindow and glass contractor · licensed 40 years · 90503Verify license
Peninsula Glass And Mirror INCWindow and glass contractor · licensed 37 years · 90505Verify license
California Reflections INCWindow and glass contractor · licensed 33 years · 90503Verify license
5 Points Sash & DoorsWindow and glass contractor · licensed 31 years · 90502Verify license
Hermosa Glass And Mirror INCWindow and glass contractor · licensed 27 years · 90502Verify license
James Price WindowsWindow and glass contractor · licensed 24 years · 90505Verify license
Esplanade Builders INCWindow and glass contractor · licensed 22 years · 90505Verify license
The Bay KingWindow and glass contractor · licensed 22 years · 90505Verify license
D C Glass Installations INCWindow and glass contractor · licensed 17 years · 90505Verify license
GR Glass INCWindow and glass contractor · licensed 10 years · 90501Verify license

More California climate pages

All cities in California →