Savannah's Climate Data and Its Top-Rated Window Pros
Savannah sits in IECC climate zone 2A, which sets the energy-performance bar here no matter who ends up installing your windows. A window license file doesn't cover Savannah on this site, so Google Maps supplies the 10 ranked names you see below. Checked September 2026.
Google Maps ratings checked · How we rank
2AIECC climate zone · ENERGY STAR Southern zone
Savannah's climate zone, in plain terms
Savannah, GA runs a January average near 51°F and climbs to about 83°F by July, a swing that adds up to roughly 1,675 heating degree days most winters, with 2,596 on the summer cooling side of the ledger.
That load is the actual argument for paying up for a better U-factor in Savannah, separate from anything a brochure claims.
Zone 2A's requirement is the floor; Savannah'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 8.2 mi away.
What FEMA's risk data says about Savannah
FEMA scores Chatham County's winter-weather risk as Relatively Moderate and its flood risk as Relatively Moderate.
Winter risk in Savannah weighs on U-factor and condensation resistance; flood risk weighs more on sill height and drainage detailing than on the glass package.
Treat these as two separate conversations with a Savannah contractor, not one.
- Hurricane
- Very High
- 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 Savannah 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.
Savannah's top-rated window installers, by Google
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.
- Savannah Windows & MoreGoogle reviews
- Windows Exteriors, LLCGoogle reviews
- Your Exterior ProsGoogle reviews
- Southern Industries Home ImprovementsGoogle reviews
- Window World of SavannahGoogle reviews
- Rogers Glass, LLCGoogle reviews
- Austin Historical - SavannahGoogle reviews
- Designer Windows & DecksGoogle reviews
- Window Depot USA of SavannahGoogle reviews
- Jack Rick's Glass CompanyGoogle reviews