Skip to content
BTU Logic

Tools / Weather Bin Generator

Weather Bin Generator

Generate weather bin data from an EPW file, or from a TMY2, TMY3, or NSRDB-style CSV. Load the file, pick the variable and the bin width, and get the hours in each bin, split by an occupied schedule. The file is read in your browser.

  • Bin by dry-bulb, dew-point, relative humidity, or wet-bulb, at the bin width you set
  • Occupied / unoccupied split (default Mon–Fri 08:00–18:00 LST), with an optional combined column
  • Annual totals or month by month
  • Upload, drop, or paste the weather file, or try a sample EPW, TMY2, or TMY3 year
  • Download the bins as CSV or a text report
Hour bins are derived from the weather file you provide (EPW / TMY2 / TMY3 / NSRDB-style CSV) using the parameters you choose (dry-bulb, dew-point, RH, or wet-bulb; occupied / unoccupied splits). Results depend on file quality and your settings. Do not treat bins as measured site weather, a manufacturer rating, or stamped engineering. Use for informational / preliminary analysis only; verify independently before relying on them.
Input format

Changing format re-parses the loaded file immediately. Accepts EPW, TMY2, TMY3, and NSRDB-style CSV.

Get NSRDB / TMY weather data (NREL) · NREL SAM weather data

Breakdown
Occupied schedule

Default Mon–Fri 08:00–18:00 interval-beginning LST (8am through 6pm). EPW / TMY hour-ending 1–24 is converted to 0–23 on parse; NSRDB is already 0–23. Unchecked days are unoccupied. Start is inclusive, end is exclusive. If start is later than end, the window wraps overnight.

Typical-year files stitch months from different source years. Weekdays follow January 1 (from EPW DATA PERIODS when present, else Sunday) so month boundaries stay continuous. Use file Y/M/D only for a real calendar year.

Accepts EPW, TMY2, TMY3, or NSRDB-style CSV. Hour counts and percents are split by the occupied schedule; percents are of that slice. Degree-day tools stay dry-bulb only.

Utility only — not a PE stamp, certified weather product, or code-approved calculation. Outputs are estimates from your inputs/files; verify before design, bidding, or compliance use. Terms