Live data · any US zip code · 10-day hourly forecast

The weather where you are, charted on demand

No data ships with this page. Enter a zip code and your browser asks for the forecast there, then Holochart draws it: six charts built from about 3,000 hourly values, and redrawn in place when you ask for another zip code.

US zip code

or try

Nothing is loaded yet. Enter a zip code and the charts are drawn from the forecast your browser fetches for it.

How it works

The other demos read a JSON file that was prepared ahead of time. This one starts empty. On a request the page makes two calls from your browser: the zip code goes to Zippopotam.us, which answers with a latitude and longitude, and those go to Open-Meteo, which answers with ten days of hourly values in °F, mph and inches and in the place’s own time zone. Neither needs an API key.

• Figures are plain functions of the response. Each chart is built by a function that takes the parsed forecast and returns a figure, so the first zip code goes to createChart and every later one to chart.react, which diffs the new figure against the old and keeps the canvas.
• Local time without a time zone library. Open-Meteo returns wall-clock times such as 2026-10-03T14:00. Holochart reads a date string with no offset as written, so the axis shows the place’s local time whatever time zone the reader is in.
• Four charts, one time axis. The hourly charts are separate charts linked with events: a relayout on one is applied to the others with chart.relayout, and a hover on one calls chart.hover({ xval }) on the others. The night bands and the “now” line are layout shapes with yref: 'paper'.
• Two y axes where two units share a panel. Pressure sits on a right-hand axis over the percentage panel, and the running rain total on one over the hourly bars (overlaying: 'y').

The forecast model has no separate chance of snow, so the precipitation panel shows hourly snowfall as its own bars on the days that have any.