Orland Park's Climate Data and Its Top-Rated Window Pros
Orland Park sits in IECC climate zone 5A, which sets the energy-performance bar here no matter who ends up installing your windows. A window license file doesn't cover Orland Park on this site, so Google Maps supplies the 10 ranked names you see below. Checked October 2026.
Google Maps ratings checked · How we rank
5AIECC climate zone · ENERGY STAR Northern zone
Orland Park's climate zone, in plain terms
Chicago-Naperville-Elgin, IL-IN runs a January average near 24°F and climbs to about 77°F by July, a swing that adds up to roughly 6,041 heating degree days most winters, with 1,120 on the summer cooling side of the ledger.
That load is the actual argument for paying up for a better U-factor in Orland Park, separate from anything a brochure claims.
Zone 5A's requirement is the floor; Orland Park'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 7 mi away.
What FEMA's risk data says about Orland Park
FEMA scores Will County's winter-weather risk as Relatively High and its flood risk as Relatively High.
Winter risk in Orland Park 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 Orland Park contractor, not one.
- Hurricane
- Very Low
- Strong wind
- Relatively Low
- Winter weather
- Relatively High
Data: FEMA, National Risk Index for Natural Hazards - County-level table, v1.20 (v1.20, December 2025).
Guides to finish before Orland Park 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.
Orland Park'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.
- Legacy Glass Block & Window Co.Google reviews
- Renewal by Andersen of ChicagoGoogle reviews
- Argo Window Repair & Replacement SouthlandGoogle reviews
- GiliJay Window ReplacementGoogle reviews
- Nowak Windows and Siding Inc.Google reviews
- Southside Window and DoorGoogle reviews
- Ferguson Industries The Original Door & Window Super StoreGoogle reviews
- Jay Siding ContractorsGoogle reviews
- AJ Exteriors & Roofing, IncGoogle reviews
- Welsh Windows PlusGoogle reviews