Weather Files — The

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

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 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). Tools like the WeatherShift™ tool use climate model

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