DebConf16/Weather
From Wiki
A good resource to find average temperature, humidity, precipitation (rain) is weatherbase.com . Here's an example of comparing between a city in India, SouthEast Asia to Cape Town for debcamp and debconf 2016.
http://www.weatherbase.com/weather/weather.php3?s=36034&cityname=Pune--Agriculture-College-
http://www.weatherbase.com/weather/weather.php3?s=61886&cityname=Cape-Town-South-Africa
http://www.weatherbase.com/weather/weather.php3?s=605011&cityname=Rondebosch-Western-Cape
Wikipedia also shares similar
https://en.wikipedia.org/wiki/Cape_Town#Climate
So, for somebody visiting from Pune it would be cold. Feel free to use the method and resources shared above to have a bit more idea about the weather.