The Weather Files -

Relative humidity and barometric pressure. 3. Future Weather Files & Climate Change

A primary source for thousands of international weather locations. The Weather Files

A widely cited repository for updated TMYx files and climate change data. Relative humidity and barometric pressure

A standard weather file stores hourly information for a full year, including: Dry-bulb and dew-point temperatures. critical for calculating heat gain.

The .epw (EnergyPlus Weather) format is a global standard developed by the U.S. Department of Energy . Other common versions include TMY3 and IWEC files.

These contain data from a specific, real-world year. They are essential for calibrating building models against actual utility bills or performance data. 2. Core Data Components

Direct and diffuse solar intensity, critical for calculating heat gain.