Houseplants generally like the same indoor temperatures that people do—somewhere between 55 and 75 degrees Fahrenheit during the day and 50 and 70 degrees at night. Hardy houseplants will flourish anywhere in this spectrum. More delicate selections might shiver if your house runs cold. Above 80 degrees, you’ll encounter frequent wilting for most all houseplants. Keep in mind, too, that some rooms (and even some areas of those rooms) will be cooler or warmer than others, no matter what the thermostat says. Plants sitting directly below a heating vent can suffer under the deluge of hot, dry air. The kitchen and bathroom are frequently warmer than your bedroom, which may factor into placement. Keeping plants near a window in winter is not usually an issue unless it is particularly drafty. Do your best to seal up the cracks or find your plant a new spot.