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
These are the most common files, created by statistically selecting the 12 most "typical" months from a multi-year period (often 10–30 years). Relative humidity and barometric pressure
These files help predict how cooling demands might increase and heating demands decrease as global temperatures rise. 4. Sourcing & Global Repositories The Weather Files
A standard weather file stores hourly information for a full year, including: Dry-bulb and dew-point temperatures.
Many countries provide localized data, such as the Building Performance site for Aotearoa New Zealand. An In-Depth Look at Weather Files - ClimateData.ca