Our trees are used to being in the Florida sun and humidity, so they thrive in warm weather: above 70 degrees F but not exceeding 104 F. That being said, our citrus can absolutely survive colder temperatures too. The danger zone for too cold is anything approaching freezing at 32 degrees. Your citrus tree can die within hours as soon as it gets below 32 degrees. Warmth, sunlight, and water are the keys to a happy tree.