i looked it up and i'm still not sure? people were saying anything from mid-may to late july. anyway i'm so excited for more rain, my town looks so much cooler in it :')
I believe it's june-july, but in my experience mostly june. I've been doing a lot of TTing and I had lots of rainstorms in june and am now on July 17th in game and havent noticed as much rain. So yeah TLDR; in my personal experience i think june
I believe the rainy season runs from mid May to June, although it may continue to rain into the first week of July. June is the main time for the rainy season though. Once it hits July, the rain will start to dry up. My second town is in July right now, and I looked on the billboard to see that it says, "July 1: Looks like the rainy season is about to wrap up! Once it's over, the summer sky will open up and it'll get starting getting hot, hot, HOT!"
I've had experience with May and June being the start of rainy season, with July being the end of it, once that month's up. Rain is great! Love it in-game and out of.