If raining.. is it still ok to go or not worth it

It's totally worth it. Lots of exhibits are indoors and the crowds are always smaller.

I'd go. I think it would be worth it.

I don't know depending on hard it's raining

We went on a rainy day and still got to see everything. We think it is worth it.

I guarantee less people on rainy days, but not a whole lot of stuff to do in the rain. Go on a cloudy day, mid-week, not on a school holiday, and you'll be golden.

If off season the vendors and other food places are not open and some exhibits close in the rain.

There is the cafe and aquarium to escape the rain but I think it's definitely more fun when not raining. Probably less people on rainy days though.