I live in the Midwest of US not far from Chicago. My air conditioning broke down The temperate inside my house rose to 29 C or 87 F. If you do not want to math get a picture of a US thermometer look up one and cross-reference to other. They are fine down to 10 C.
Plants will help soak up ammonia or nitrates but you will need a light source. It is not that hard to learn.