Florham Park, NJ Climate Specs + Top-Rated Window Installers
Florham 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 Florham Park on this site, so Google Maps supplies the 10 ranked names you see below. Checked September 2026.
Google Maps ratings checked · How we rank
5AIECC climate zone · ENERGY STAR Northern zone
Florham Park's climate zone, in plain terms
New York-Newark-Jersey City, NY-NJ runs a January average near 31°F and climbs to about 76°F by July, a swing that adds up to roughly 5,262 heating degree days most winters, with 1,023 on the summer cooling side of the ledger.
That load is the actual argument for paying up for a better U-factor in Florham Park, separate from anything a brochure claims.
Zone 5A's requirement is the floor; Florham 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 3.1 mi away.
What FEMA's risk data says about Florham Park
FEMA scores Morris County's winter-weather risk as Very High and its flood risk as Relatively High.
Winter risk in Florham 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 Florham Park contractor, not one.
- Hurricane
- Relatively Moderate
- Strong wind
- Relatively High
- Winter weather
- Very High
Data: FEMA, National Risk Index for Natural Hazards - County-level table, v1.20 (v1.20, December 2025).
Guides to finish before Florham 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.
Florham 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.
- American Home ContractorsGoogle reviews
- Windella Windows & Doors, Inc.Google reviews
- The Carpenters Touch Roofing & SidingGoogle reviews
- Home Exteriors By The Men With ToolsGoogle reviews
- Madison DoorGoogle reviews
- New View Windows & DoorsGoogle reviews
- AMC Windows & DoorsGoogle reviews
- Window NationGoogle reviews
- AGM Window and Door, LLc- Replacement Windows and InstallationsGoogle reviews
- Roofing Windows and Siding by 2B DevelopmentGoogle reviews