This dataset contains daily-collected weather forecasts for up to seven days ahead for all the meteorological observatories in Japan, published by the Japan Meteorological Agency (JMA) at https://www.jma.go.jp/bosai/forecast/. We collect, structurize, and accumulate the prediction since the page is overridden whenever the information is updated. The data is automatically updated daily using GitHub Actions. Since the actual forecasts are published multiple times a day, we set up the column fromhour which represetnts the announced time. Further details are also available at note.com/jniimi/n/n06d3423bbbbf (Japanese only). This dataset can be utilized across a wide range of research fields.…