Buena Park Weather Forecast Issued: 10 pm Sun 07 Aug local time. Print. Buena Park 10 day weather forecast, updated four times a day and shows the weather summary plus detailed sun, rain, snow, wind and temperature. The weather forecast extends out to 10 days showing information for morning, afternoon and overnight. See the links below the weather forecasts for other cities, towns and villages near Buena Park. Buena Park 1 – 3 Day Weather Forecast Summary: Mostly dry. Warm (max 31°C on Mon afternoon, min 15°C on Tue night).