Leopard Gecko Temperature Guide: Ideal Warm Side, Cool Side, and Night Temps

For most healthy adult leopard geckos, a practical daytime target is 75-80°F on the cool side and 85-90°F on the warm side, with a basking surface around 88-95°F. These numbers fit well with veterinary references that recommend a thermal gradient and a preferred optimal temperature zone in the upper 70s to mid 80s, plus a basking area that is warmer than the surrounding air.

What matters most is the gradient. If the whole enclosure is warm, your gecko cannot cool down. If the whole enclosure is cool, digestion and appetite may suffer. Place one hide on the warm side, one on the cool side, and a humid hide where it stays comfortably moist without becoming soggy.

At night, a mild temperature drop is normal and healthy for leopard geckos. A common target is about 68-75°F overnight, as long as the enclosure does not stay cold for long periods. Merck notes that nighttime temperatures generally fall by about 5°C / 9°F from daytime targets.

If your room stays in the upper 60s to low 70s overnight, extra night heat may not be needed. If temperatures regularly fall below that range, ask your vet about a safe supplemental heat source that does not produce bright visible light. Avoid colored night bulbs, which can disrupt normal day-night cycles.

This is where many setups go wrong. Leopard geckos use belly contact and nearby warm surfaces to thermoregulate, so surface temperature at the basking area and inside the warm hide matters as much as ambient air temperature.

Check air temperatures with digital probe thermometers and check surfaces with an infrared temperature gun. A tank can read acceptable air temperatures while the basking tile or hide floor is still too hot or too cool. Hot rocks are not recommended because they can overheat and cause burns.

Use two digital probe thermometers at minimum: one on the warm side and one on the cool side. Then use an infrared temperature gun to spot-check the basking surface, warm hide floor, and cool hide floor. Stick-on dial thermometers are often less accurate and can miss important surface differences.

Measure temperatures after the heat source has been running long enough to stabilize, usually a few hours. Recheck seasonally. A setup that works in July may run too cool in January or too warm during a summer heat wave.

A gecko that is too cold may show low appetite, sluggishness, poor digestion, weight loss, or spending nearly all its time pressed into the warm hide. A gecko that is too hot may show restlessness, glass surfing, avoiding the warm side completely, dehydration, or open-mouth breathing in severe overheating.

Shedding trouble can happen at either extreme, especially when temperature and humidity are both off. If your gecko stops eating, loses tail thickness, has repeated stuck shed, seems weak, or may have been burned, see your vet promptly.

Common problems include heating the whole enclosure evenly, relying on one thermometer, skipping a thermostat, using a hot rock, or placing the heat source without checking the actual surface temperature. Another frequent issue is putting all hides on one side, which prevents normal thermoregulation.

Leopard geckos also need a humid hide, especially during sheds. Even though they are arid-environment reptiles, Merck notes humidity needs rise during ecdysis, and PetMD warns that dry conditions can contribute to retained shed around the eyes and toes.

Talk with your vet if you are not sure your enclosure is meeting your gecko’s needs, especially if your pet has appetite changes, repeated shedding problems, weight loss, weakness, or a history of metabolic bone disease. Temperature problems often overlap with lighting, supplementation, hydration, and enclosure design.

A reptile-focused exam and husbandry review commonly falls in a cost range of about $75-$150 in the U.S. for the visit itself, with added costs if your vet recommends fecal testing, imaging, or treatment. That can be money well spent when a gecko has chronic husbandry-related issues or vague signs that are easy to miss at home.