No, Inuit don't have 100 words for snow.
In 1911 Franz Boas listed four Inuit root words for snow, much like English with snow, sleet, slush and powder. A 1940 essay by Benjamin Whorf popularised the idea; later writers inflated the count to 50 and 100. What's true: Inuit languages build very long words from a few roots; how many snow words exist depends on what you count as a word.
Useful: Next time someone sells you the 100 snow words, you know where the number came from.
Source: en.wikipedia.org