Weather Tools

Replace a range of days in a base EPW with real historical weather for a given point. Fetches the hours from Open-Meteo, patches the rows and the ground-temperature header, and hands back a new EPW.

Plot up to a week straight out of an EPW: temperature and relative humidity above, direct and diffuse radiation with cloud cover below, on an A4 page with night and twilight bands. Downloads as SVG or 300 dpi PNG.

Calculate every hour of the year and draw a day-by-hour outdoor comfort map with cold, comfortable and hot shares. Downloads as SVG or high-resolution PNG.

Check row structure, missing values, duplicated hours, physical ranges and radiation consistency.

Compare two weather files by month and quantify changes in temperature, humidity, solar radiation, wind and precipitation.

Find the hottest, coldest, most humid, sunniest, windiest and wettest seven-day periods.

Calculate monthly statistics, solar and precipitation totals, degree days and wind-direction frequencies.

Choose a calendar range and export only the hourly weather fields you need.

Safely edit location metadata, comments and the ground-temperature header without altering hourly data.

Extract empirical heating and cooling percentile conditions and representative extreme days.