I remember on my first trip to Bonaire, my friend Herman taking a photo of a mud puddle, because he said he hadn't seen standing rain water on his trips to Bonaire before that trip.
I have been back in Jan/Feb, during the "rainy season", and what rain there was, came and went quickly, and was not heavy. More what we call short rain bursts, or often light, short rain showers up here in upstate NY. It did rain a bit on and off, several days that we were there, but never enough to even remotely effect our non stop diving!
Up here a rainy season, means nearly non stop rain for days on end, but that is NOT what rainy season on Bonaire appears to be.