hi! dont have a scientific answer for you, but i got back saturday and it meant to us: light thundershowers and overcast skies, warm weather, but most of all NO WIND!! this meant the already out-of-control mosquitos were UNBELIEVABLE. dont underestimate them, we used a can of off EVERY DAY!! it is 7.50-10.00 US there, BRING A LOT. I AM NOT KIDDING!! also, buy benedryl CREAM (pills will make you tired, especially if you drink alcohol, and afterbite, they really stop the itch or you cant sleep. i was everybody's best friend because i did. they are unlike anything i have ever seen if you go north or south of san pedro. before last thursday, the weather was HOT and sunny, but the breeze then on the beach was comfortable.