Kerrville, TX Climate Specs + Top-Rated Window Installers
Local risk and climate data for Kerrville, TX sit below, translated into plain terms for a window buyer rather than left as raw codes. 6 installers follow that data instead of a license roster, their rank built from Google's star rating and how many people left one. Checked September 2026.
Google Maps ratings checked · How we rank
3BIECC climate zone · ENERGY STAR South-Central zone
Kerrville's climate zone, in plain terms
Kerrville, TX runs a January average near 46°F and climbs to about 81°F by July, a swing that adds up to roughly 2,291 heating degree days most winters, with 2,178 on the summer cooling side of the ledger.
That load is the actual argument for paying up for a better U-factor in Kerrville, separate from anything a brochure claims.
Zone 3B's requirement is the floor; Kerrville'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 2.8 mi away.
What FEMA's risk data says about Kerrville
FEMA scores Kerr County's winter-weather risk as Relatively High and its flood risk as Relatively Moderate.
Winter risk in Kerrville 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 Kerrville contractor, not one.
- Hurricane
- Relatively Low
- Strong wind
- Relatively Moderate
- 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 Kerrville 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.
Kerrville'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.
- 1st Call GlassGoogle reviews
- Aloha Glass & MirrorGoogle reviews
- The Window Guys Of the Hill CountryGoogle reviews
- Lambert's Glass & MirrorGoogle reviews
- All Weather Roofing And RemodelingGoogle reviews
- Kerrville Viking Auto GlassGoogle reviews