There is a song, "I love Paris in the springtime" by Cole Porter. While he may for a variety of reasons, I would have to argue that the best month (especially for a first time tourist) would be in summer. No offense to Mr. Porter.

Don't get me wrong. Paris, any month, beats the socks of most cities on their finest days. It's my favorite city in the world. I am just saying, if you had to pick a month for your first time, and you were a fair weather tourist, the summer might be a better bet.

Or you could love the great discounts that come with off tourist seasons. I know that has been a big draw for me to going in the winter. I love finding cheap hotels in Paris and even cheaper flights.
In Paris, you have the Eiffel Tower, the Arc de Triomphe and numerous monuments you may not want to visit if it's cold. On the other hand, there are a plethora of indoor activities from the world famous Louvre to the Notre Dame Cathedral.

When it comes to rain in Paris, the month of the year isn't a huge factor. The rain in Paris is pretty evenly spread over the 12 months with the wettest month averaging about 4 days more rain the dryest.

No matter when you go, I am sure you will have an awesome time. After all, it's Paris we're talking about!