Fleming Island, FL Climate Specs + Top-Rated Window Installers
Fleming Island 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 Fleming Island on this site, so Google Maps supplies the 5 ranked names you see below. Checked September 2026.
Google Maps ratings checked · How we rank
2AIECC climate zone · ENERGY STAR Southern zone
Fleming Island's climate zone, in plain terms
Jacksonville, FL runs a January average near 56°F and climbs to about 84°F by July, a swing that adds up to roughly 944 heating degree days most winters, with 3,303 on the summer cooling side of the ledger.
That load is the actual argument for paying up for a better U-factor in Fleming Island, separate from anything a brochure claims.
Zone 2A's requirement is the floor; Fleming Island'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 9.6 mi away.
What FEMA's risk data says about Fleming Island
FEMA scores Clay County's winter-weather risk as Very Low and its flood risk as Relatively Moderate.
Winter risk in Fleming Island 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 Fleming Island contractor, not one.
- Hurricane
- Relatively Moderate
- Strong wind
- Relatively 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 Fleming Island 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.
Fleming Island'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.
- Jimmy's Window Repair By AJGoogle reviews
- Lee & Cates Glass - Orange Park/Fleming IslandGoogle reviews
- MIP ConstructionGoogle reviews
- Eco Window Replacement Orange ParkGoogle reviews
- Quillco Screen RepairGoogle reviews