Why does my face become oily in summer?

It isn’t the oil so much as the perspiration. We tend to sweat more in the summer.

I have oily skin 365 days a year. It’s because of my American Indian heritage.

For you, it may be the heat and humidity, depending on where you live.

What is your skin type. You might have oily skin and so I suggest you carry bloating sheets to use over the day. Also try to use face creams and face washes that are oil-free.