Hi John
Was in BKK and Phuket this time last year.Most days it was beautiful,sunny and warm then about 4-pm at night the sky would open and it would rain for a few hours--very heavy at times.it also rained a lot overnight.
In no way did it detract from the holiday.Usually by the time the rain came we had done all our stuff and were quite happy to possie in at a nice bar/resturant and watch the world go by.
I spent the first 24 years of my life in Northern ireland--so nomatter what way you look at things the Thai weather still beats U.K weather with a big stick.
Cheers Laurs