Ryanair offer travel insurance policies as an add on to a flight booking, or they can also be purchased as stand-alone products. Ryanair travel insurance is offered in two levels, so you can choose the option that's right for you and your wallet.
Jamaica's rainy season coincides with ours here in Florida (I am in the Tampa area) for the most part. We have anywhere from 30-50% chance of rain daily until hurricane season is over. I didn't mean you have rain every day, all day from May to December in Jamaica, but I assume it is a lot like here in Florida.
Weather in Jamaica in September. The average maximum daytime temperature in Jamaica in September is a hot 31Â°C (88Â°F) with high heat & humidity. There are usually 7 hours of bright sunshine each day, which represents 54% of the 12 hours of daylight. The average sea temperature in and around Jamaica in September is 29Â°C (84Â°F). Expect 229mm (9.0 inches) of rainfall across the whole of September with 14 days with some rain falling. Maximum UV levels will be extreme (11+ UV index) at midday when the skies are clear.