The - Weather Files

A widely cited repository for updated TMYx files and climate change data.

As the climate shifts, historical data (TMY) may become less representative of a building's future lifespan. Engineers now use to "future-proof" designs. The Weather Files

A standard weather file stores hourly information for a full year, including: Dry-bulb and dew-point temperatures. A widely cited repository for updated TMYx files

Tools like the WeatherShift™ tool use climate model projections to adjust historical files for future decades (e.g., 2050 or 2080). The Weather Files

Many countries provide localized data, such as the Building Performance site for Aotearoa New Zealand. An In-Depth Look at Weather Files - ClimateData.ca

A primary source for thousands of international weather locations.

There are two primary categories of weather files used to analyze building energy demand and resilience: