In general, they should not be exposed to temperatures below 55 degrees Fahrenheit. Indoors protect them from cool drafts, such as those from an air-conditioning vent. These plants like humidity, so you might have to boost humidity around your philodendron if you live in a dry climate.

Does philodendron like high humidity?

Do Philodendrons like humidity? Philodendrons love humidity. They are healthiest at 70-90%, which can be hard to maintain if you're not paying close attention to your plants. You can get a hygrometer and set it up by your plant to measure this.

Do Philodendrons need humidifier?

Misting the leaves with tepid water twice a day has some beneficial effect as well. However, if you are trying to grow plants that need a constant source of high humidity--aroids such as philodendron and anthurium, gesneriads, exotic begonias and bromeliads--a cool-vapor humidifier is the answer.