Singapore and Malaysia always rain every day. The rain comes with lighting. Then legoland theme park and water park outdoor games will be closed, the ticket will not be refunded because Of weather.
When I was in legoland theme park, raining from 4-7pm. All outdoor games closed so I missed 1-2 playing sections. We can only watch 4d movies, and rest in the Lego playing room and the small indoor playground. The other day I was in water park, the whole park was stopped from 3-4pm due to lighting.
The tickets sold from counter is only valid for that day of purchase, it was not refundable because of bad weather. So it is better to go in the morning. Raining usually in pm.