# Astro Weather

> Calibrated night-sky forecast for astrophotography: the chance of a fully clear sky each hour, fog risk, dew margin and seeing, for any latitude and longitude.

The page at / is rendered by JavaScript and holds no data in its HTML. To read a forecast, take the page URL and change the path to /api/brief, keeping the query string:

- Page: https://weather.paleblue.cloud/?lat=-37.8136&lon=144.9631&name=Melbourne
- Data: https://weather.paleblue.cloud/api/brief?lat=-37.8136&lon=144.9631&name=Melbourne

The brief is JSON, one entry per night with every hour from sunset to sunrise. Its "about" field explains each field. Chance clear (chanceClearPct) is the headline figure; night ratings (good, fair, poor) come from it and the fog chance.