Johnston's Climate Data and Its Top-Rated Window Pros
ENERGY STAR groups Providence County into its Northern zone, the U-factor and SHGC target worth checking against any quote you get in Johnston. Below that spec discussion sit 10 installers, their order set by Google rating, since Johnston is outside this site's window license file. A high rating is worth a look, not a finished decision.
Google Maps ratings checked · How we rank
5AIECC climate zone · ENERGY STAR Northern zone
Johnston's climate zone, in plain terms
Providence-Warwick, RI-MA runs a January average near 30°F and climbs to about 74°F by July, a swing that adds up to roughly 5,478 heating degree days most winters, with 812 on the summer cooling side of the ledger.
That load is the actual argument for paying up for a better U-factor in Johnston, separate from anything a brochure claims.
Zone 5A's requirement is the floor; Johnston'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 8.6 mi away.
What FEMA's risk data says about Johnston
FEMA scores Providence County's winter-weather risk as Relatively Low and its flood risk as Relatively High.
Winter risk in Johnston 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 Johnston contractor, not one.
- Hurricane
- Relatively Moderate
- Strong wind
- Relatively Moderate
- 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 Johnston 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.
Johnston'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.
- Renewal by Andersen Window ReplacementGoogle reviews
- Seaberg Construction INC.Google reviews
- Venture Window LLCGoogle reviews
- The Window Source RIGoogle reviews
- Providence Glass & Mirror, LLCGoogle reviews
- Atlantic ExteriorsGoogle reviews
- Window World of Rhode IslandGoogle reviews
- Glass America Window MFG Inc.Google reviews
- EcoView Windows & Doors of Rhode IslandGoogle reviews
- A-1 Glass ServiceGoogle reviews