Greenville's Climate Data and Its Top-Rated Window Pros
Greenville sits in IECC climate zone 3A, which sets the energy-performance bar here no matter who ends up installing your windows. A window license file doesn't cover Greenville on this site, so Google Maps supplies the 10 ranked names you see below. Checked October 2026.
Google Maps ratings checked · How we rank
3AIECC climate zone · ENERGY STAR South-Central zone
What zone 3A means for a Greenville window
Greenville-Anderson-Greer, SC runs a January average near 41°F and climbs to about 78°F by July, a swing that adds up to roughly 3,337 heating degree days most winters, with 1,398 on the summer cooling side of the ledger.
That load is the actual argument for paying up for a better U-factor in Greenville, separate from anything a brochure claims.
Zone 3A's requirement is the floor; Greenville'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 mi away.
Storm and weather risk around Greenville
Greenville County's hail risk sits at Relatively Moderate and its wildfire risk at Very Low, according to FEMA's National Risk Index.
Hail risk matters for glass and screen durability in Greenville; 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 Greenville installer before you settle on a product line.
- Hurricane
- Relatively Moderate
- Strong wind
- Relatively High
- 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 Greenville 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.
10 top-rated window installers near Greenville, SC
The order below weighs a Google rating against its review count, the same way this site weighs a U-factor against a brochure claim: on the number, not the name. Treat it as a rating, never as proof of a license, bond or HVHZ approval.
- B&C Siding Company LLCGoogle reviews
- Action Exteriors GreenvilleGoogle reviews
- C&W Roofing, Siding & Window Co.Google reviews
- Glass Doctor of Greenville SCGoogle reviews
- Window NationGoogle reviews
- Southern Industries Home ImprovementsGoogle reviews
- Taylors Window & ScreenGoogle reviews
- Neely's Windows Doors & MoreGoogle reviews
- Window World of UpstateGoogle reviews
- Windows IncGoogle reviews