Oakland, CA: Climate Zone, Risk and Window Requirements
Local risk and climate data for Oakland, 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
3CIECC climate zone · ENERGY STAR South-Central zone
Oakland's climate zone, in plain terms
Alameda County's normal precipitation runs about 22.6 inches a year, with 0.0 inches of snow, which is a separate question from energy performance but still shapes which window details matter in Oakland.
Moisture and glass performance are handled by different parts of a window's spec sheet, and a Oakland buyer benefits from checking both instead of assuming one implies the other.
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 2.9 mi away.
What FEMA's risk data says about Oakland
Alameda 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 Oakland; 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 Oakland installer before you settle on a product line.
- 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 Oakland 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.
Oakland's longest-licensed window installers
Oldest license first, newest last, pulled directly from the state's file. This list isn't for sale.
- Uneda Glass & Window COVerify license
- East Bay Glass CO INCVerify license
- Vonnwolf Artistic General ContractorVerify license
- M A Z & G D HVerify license
- Russo Glass COVerify license
- B Side INCVerify license
- Romero Glass StudiosVerify license
- All Bay Area GlassVerify license
- A C R Glass And DoorsVerify license
- Nzilani Glass ConservationVerify license
- SF Glass & Mirror INCVerify license
- Big Brother GlazingVerify license