Should I wash my hair everyday?

My hair is pretty oily,when I wash my hair one day and it's all nice and clean and soft when I go to bed and wake up it's a bit oily,I can't go one day without washing my hair because it gets really oily. I also live in a really hot and humid town. I have heard it makes your hair healthier if you don't wash it all the time. I dye my hair black about every 1-2 months and my hair is not dry just it also isn't silky or soft of how I want it. It also isn't thick,it is just a bit plain.