I was reading RS's Provence & Riviera book and online, and in the "Itinerary" section under "When to Go" it is mentioned that: "Spring and fall are best, with generally comfortable weather — though crowds can be a problem, particularly during holiday weekends and major events (May is worst)."
Not sure why May is "worst" -- other than the Cannes film festival and Monaco Grand Prix, what would lead to this conclusion?
Thanks!