well, to be fair, it's been *threatening* to rain more than it's been raining (i think that might be worse though. i wish it would just RAIN and get it over with) but i recommend you bring a jacket for sure, it's been chilly. you could bring a short-sleeved something just in case, if you also bring a sweater to wear over it... oh, and bring socks !
aaah, april in paris : when you have to put on your entire wardrobe every day just to be prepared for whatever unpredictable weather you get.
i've been carting around my umbrella with me for the past week, haven't used it once, but nearly forgot it twice now (once i actually *did* forget it, but i remembered just as i was about to go in the métro, so i rushed back to get it).
i should add, it has actually rained some, but not as much as i expected.