What Temperature and Humidity Does a Leopard Gecko Need?
Leopard geckos come from the rocky drylands of Afghanistan, Pakistan and northwest India, so their care numbers follow that climate: warm ground, dry air, and a cool retreat. The single most important figure is the warm-side floor temperature, because these geckos digest using belly heat from below rather than basking under a lamp. Get the gradient right and most husbandry problems disappear.
What temperature does a leopard gecko need?
Aim for a warm-side surface of 88 to 92F, a basking or belly-heat zone of 90 to 94F, and a cool side around 75F. Nighttime can fall to the low 70s. Measure floor temperature with a probe thermometer, not a stick-on dial, and control the heat source with a thermostat so it never overshoots.
Because leopard geckos absorb heat through the belly, an under-tank heat mat or a low-mounted halogen over a slate tile is the standard setup. Place the thermostat probe directly on the warm surface the gecko touches. A thermal gradient lets the animal self-regulate: it moves to the warm tile to digest a meal, then retreats to the cool hide to cool down. Without that range, a gecko gets stuck at one temperature it cannot escape.
What humidity is right for a leopard gecko?
Ambient humidity should stay between 30 and 40 percent for most of the enclosure. Add one moist hide lined with damp paper towel or sphagnum moss, which can read 70 to 80 percent inside. The gecko uses that humid pocket to loosen old skin during a shed, then returns to the dry main enclosure.
Chronically high humidity across the whole tank is a common cause of respiratory infection and skin problems in leopard geckos. The fix is ventilation and a dry substrate like tile, slate or reptile carpet rather than damp soil. Reserve moisture for the shedding hide alone. A digital hygrometer on the cool side tells you whether the room itself is pushing ambient humidity above the safe band.
Why does belly heat matter more than air temperature?
Leopard geckos are nocturnal ground-dwellers that thermoregulate by pressing against warm surfaces. Their digestion depends on a warm belly, so a heated floor matters more than warm air. A tank that feels warm to your hand but has a cool floor can leave a gecko unable to digest, leading to regurgitation and weight loss.
This is why keepers measure surface temperature on the warm tile rather than air temperature in the middle of the tank. The University of Massachusetts and most reptile vets recommend a belly-heat source on a thermostat for exactly this reason. If a gecko goes off food, the warm-side floor reading is the first number to check before anything else.
What are the ideal leopard gecko ranges at a glance?
A quick reference: warm side 88 to 92F, basking spot 90 to 94F, cool side 73 to 76F, ambient humidity 30 to 40 percent, and a moist hide near 70 to 80 percent. Use these as targets and adjust with a thermostat. Track readings over weeks to catch slow drift before it stresses the animal.
| Parameter | Safe range | Notes |
|---|---|---|
| Warm side (floor) | 88 to 92F | Measure on the tile, thermostat controlled |
| Basking / belly heat | 90 to 94F | Drives digestion |
| Cool side | 73 to 76F | Allows escape from heat |
| Ambient humidity | 30 to 40% | Keep the main tank dry |
| Moist hide | 70 to 80% | For clean, full sheds |
Key takeaways
- Warm side 88 to 92F, basking 90 to 94F, cool side around 75F, measured on the floor.
- Keep ambient humidity at 30 to 40 percent and offer one moist hide for shedding.
- Belly heat drives digestion, so floor temperature matters more than air temperature.
- Use a thermostat-controlled heat source and a probe thermometer, never a stick-on dial.
- Chronic high humidity invites respiratory infection, so keep the main enclosure dry.
Frequently asked questions
- Do leopard geckos need a heat lamp at night?
- Not usually. Leopard geckos tolerate a nighttime drop into the low 70s, which mimics their desert origin. If your room falls below about 68F, use a thermostat-controlled ceramic heat emitter or deep heat projector rather than a bright bulb, since a visible light at night can disturb a nocturnal animal's rest.
- Can a leopard gecko's humidity be too low?
- Yes. If ambient humidity drops far below 30 percent, geckos can struggle with incomplete sheds, leaving retained skin on toes and tail tips that can cut off circulation. The moist hide solves most of this. If sheds are still patchy, lightly mist the moist hide and confirm the gecko is using it during a shed cycle.
- What thermometer should I use for a leopard gecko?
- Use a digital probe thermometer placed on the warm-side floor where the gecko rests, plus a separate digital hygrometer for humidity. Stick-on dial thermometers and guesswork are unreliable and read air rather than surface temperature. An infrared temperature gun is also handy for spot-checking the basking tile quickly.
- Why is my leopard gecko not eating?
- Cold belly heat is a frequent cause. If the warm-side floor sits below about 88F, digestion slows and appetite falls. Check that surface reading first, then consider shedding, brumation in cooler months, stress from a new enclosure, or illness. Persistent refusal with weight loss warrants a visit to an exotic vet.
Exotic Pet Husbandry Research, BigBalli. We translate species care sheets into daily, trackable numbers, cross-checked against sources including the RSPCA and VCA Hospitals.
Crittora provides husbandry and educational information, not veterinary diagnosis or treatment. A gecko that stops eating, loses weight, or shows labored breathing should be seen by a qualified reptile or exotic vet.