HiRuchika, Singapore has a moderate climate which is pleasant throughout the year. Hence, you can easily plan it. Incase I have answered your query, please hit the upvote button. Thanks in advance.
As a tropical country, Singapore has fairly stable climate throughout the year. Rains are a bit less during June and July but The temperature in June will be hot, humid and sticky with few days of rain every now and then.
Singapore is a good idea any time in the year , esp if you are visiting with kids. Weather is almost same throughout. Just too many parks / gardens/ activities which can be done with kids. Have a great trip