Window Climate Specs for Springfield, VA
Local risk and climate data for Springfield, VA are below, translated into plain terms for a window buyer rather than left as raw codes. Use it to check a proposed spec before you sign, not just to browse.
Licenses checked · Virginia Department of Professional and Occupational Regulation, Board for Contractors
4AIECC climate zone · ENERGY STAR North-Central zone
Springfield's climate zone, in plain terms
Washington-Arlington-Alexandria, DC-VA-MD-WV runs a January average near 38°F and climbs to about 81°F by July, a swing that adds up to roughly 3,769 heating degree days most winters, with 1,738 on the summer cooling side of the ledger.
That load is the actual argument for paying up for a better U-factor in Springfield, separate from anything a brochure claims.
Zone 4A's requirement is the floor; Springfield'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 9.3 mi away.
What FEMA's risk data says about Springfield
Fairfax County's hail risk sits at Relatively High and its wildfire risk at Very Low, according to FEMA's National Risk Index.
Hail risk matters for glass and screen durability in Springfield; wildfire risk matters more for the frame material and nearby vegetation than for the glass itself.
Either way, it's a reasonable question to bring to a Springfield installer before you settle on a product line.
- 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 Springfield 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.
Springfield's longest-licensed window installers
Oldest license first, newest last, pulled directly from the state's file. This list isn't for sale.
- Windows Installed INCVerify license
- Perfection Glazing And AluminumVerify license
- Western Glass & Metal LLCVerify license
- Metal Craft And Glass MC&G LLCVerify license