Window Climate Specs for Chico, CA
Local risk and climate data for Chico, 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 · California Contractors State License Board
3BIECC climate zone · ENERGY STAR South-Central zone
Chico's climate zone, in plain terms
Chico, CA runs a January average near 46°F and climbs to about 78°F by July, a swing that adds up to roughly 2,676 heating degree days most winters, with 1,474 on the summer cooling side of the ledger.
That load is the actual argument for paying up for a better U-factor in Chico, separate from anything a brochure claims.
Zone 3B's requirement is the floor; Chico'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 4.7 mi away.
What FEMA's risk data says about Chico
Butte County's hail risk sits at Relatively Low and its wildfire risk at Relatively High, according to FEMA's National Risk Index.
Hail risk matters for glass and screen durability in Chico; 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 Chico installer before you settle on a product line.
- 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 Chico 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.
Chico's longest-licensed window installers
Oldest license first, newest last, pulled directly from the state's file. This list isn't for sale.
- Miller Glass INCVerify license
- San Francisco GlassVerify license
- Lash's GlassVerify license
- Selig Construction CorporationVerify license
- Holt Construction INCVerify license
- Krum ConstructionVerify license
- Russell's WindowsVerify license
- Genes Glass INCVerify license
- Butte County Shower Door COVerify license