I used to believe that it rained everywhere at the same time. (I came from a small country, it was mostly true.) I don't remember how I explained the fact that we never got snow.
A childhood belief about weather

others believed things like this
- i was convinced that snow was pink, i was devastated the first i saw real snow.Anon
- When I was around four,I used to think when it rained in my area,it rained over the WHOLE world too...Anon
- When I was a kid I thought that when it rained, it rained all over the world.
Anon - When it rained, it rained all over the planet simultaneously— Artgoober
- I used to believe that the whole world rained at the same time.— vannesa
- I used to believe that a vitamin was a small animal
only recently I have found out that it is not true... :)— Sylwia