When traveling, it's generally smart to pack in preparation for rain or any other conditions that may arise. The rainfall in Syracuse is roughly greater than that of Queretaro. You can assume this to be the case over the next 21 days.
Expect the weather to be around 82 °F on average in May. As the temperature peaks, try to get your plans done early, as flight price and availability will have an impact on your travels. The climate in Queretaro is generally hotter than in Syracuse.