Most rare and exotic cacti varieties prefer warm temperatures ranging from 70°F to 90°F (21°C to 32°C). However, it is essential to provide them with a slight temperature drop during the winter months to mimic their natural habitat. Aim for a temperature range of 50°F to 60°F (10°C to 15°C) during the winter. As for humidity, cacti generally thrive in low humidity environments, so avoid placing them in areas with high moisture levels.