Astroweather is weather forecast dedicated to weather for astronomical observation Astroweather is derived from product from 7timer.org, incorporated astronomical weather forecast and sunset/sunrise, moonrise/moonset display Web-based metrological forecast products, mainly derived from the NOAA/NCEP-based numeric weather model, the Global Forecast System (GFS). 7Timer! was firstly established in July 2005 as an exploration product under supported of the National Astronomical Observatories of China and had been largely renovated in 2008 and 2011. Currently it is supported by the Shanghai Astronomical Observatory of Chinese Academy of Sciences. It was firstly designed as a weather forecast tool for astronomical purpose, as the author himself is a long-term star gazer and was always annoyed by fluky weather conditions. Astroweather also provide services including: 1. Astronomical event forecast 2. Light pollution map, satellite images 3. Rise and set times for stars, planets, moons and satellites 4. An astronomy forum