I went to the nicoya peninsula during the rainy season. The weather was very nice up to about 3:00 P.M. then the down pours came. It probably rained 3 inches an hour, but the rain was over with by around 5:00 p.m. If you like mud I would recommend an a.t.v. tour Me and my wife went with Two other couples and they all said that it was the highlight of the trip.