We had rain for at least 4 days during our week in November. 15 minutes of clouds and sprinkles, moved to under umbrella or trees a couple of times, stayed in pool when we were already in. A good shower while we were getting ready for dinner once and once late at night, no problem to us! It doesn't last long and sounds nice and soothing in the evening. All short lived, no longer than 15 minutes. Nothing to worry about and it doesn't ruin anything! It's not a problem, just a situation!!!!
Okay, because you choose to check it out, take the next step and repeat this montra--"rain in Jamaica is better than rain at home". If that doesn't help, repeat--"anytime/anything in Jamaica is better than being at home".
During the months of June-November, it's guaranteed that there will be rain every day, so the forecasts are usually correct. But....unless we're under a 'freak' storm front or hurricane approach, the rains rarely last all day, or even more than two hours.
Not sure when you're coming, but we've now started the 'dry season'....rain is still needed to keep things green and lush, but rainfall will be minimal and days and days can go by with not a drop. The worst dry spell I've ever seen was after Hurricane Ivan (6+ years ago)...an 8 month drought. The poor island was brown and crunchy, self combusting in the heat. This year went 6 months before our good heavy rains restored the beauty. Forecasts are calling for another good long drought that we've apparently already entered...so, chances are, the only showers you'll encounter will be those in the resort bathroom.