How bad is the monsoon weather in July in Yangon?
We usually have heavy rains and flooding here in Yangon. Making it difficult to travel. Be careful when walking around in rainy season. Usually gutters are covered with water and you might not be able to see them. Have an umbrella and flipflop ready. Your usual shoes may not be suitable for heavy rain. On plus side, rain has taken away the heat and everything look green and fresh. It really feel nice after rain when you live near by large trees.
I travelled to Myanmar in July last year, We were lucky, the weather was fine, only rain at night and not much. in July less tourist than other month.
I would not recommend to visit in monsoon, too much rain.