It actually snowed in Delhi in, IIRC, January 2010. I don't know what the temperature was though.
Story of coping with unexpected snow: there's a woman in the LBS who grew up in Jerusalem, where her brother still lives. One winter day he got up to find it had snowed. This is unusual but nowhere near as freakish as snow in Delhi. So did he scrape the ice off his car and drive to work? No, he boiled a kettle and poured boiling water over the windscreen.
A new windscreen in Israel is every bit as expensive as it would be here.