We were at Wat Arun for barely 5 minutes when we had to rush back to the ferry because the rain started to pour.
I told my mom that we should “wait it out”.
Sure enough the rain abated 20 or so minutes later and we went on our way.
So for those of you traveling to Bangkok, always bring an umbrella where ever you go.
It will protect you from extreme sun light and from unexpected down pours of rain.