Reptile Temperature & Humidity Checker
Last updated: · Reviewed against sources listed below
This reptile temperature guide checks your enclosure readings for you. Enter the basking spot, cool side, night temperature and humidity, and see at a glance what is in range, what is off and how to fix it, based on the ranges for your species.
Your readings
| Reading | Yours | Target | Status |
|---|
What the result means: “Good” readings are inside the target range; “slightly” low or high readings are within a couple of degrees of it and usually fine to leave. Readings marked “too low” or “too high” come with a suggested fix.
How it works
For each species we store four target ranges: basking surface, cool side, night low and relative humidity. The tool converts your readings to °F if needed and compares each one with its range. A reading within 2°F, or 5 percentage points of humidity, outside the range is marked as slightly off rather than wrong, because thermometers and sources both vary a little.
Readings further outside the range get a specific suggestion for that measurement, such as changing bulb wattage or adding a humid hide. If you enter both basking and cool-side readings, the tool also checks that they are at least about 10°F apart, since a gradient matters as much as the numbers themselves. Any reading that is impossible for a reptile enclosure is flagged so you can check the unit or the thermometer.
Reference data: target ranges
| Species | Basking | Cool side | Night | Humidity |
|---|---|---|---|---|
| Bearded Dragon | 95–110°F35–43°C | 75–85°F24–29°C | 65–75°F18–24°C | 30–40% |
| Leopard Gecko | 90–95°F32–35°C | 70–77°F21–25°C | 65–75°F18–24°C | 30–40% |
| Ball Python | 88–92°F31–33°C | 75–80°F24–27°C | 72–78°F22–26°C | 50–70% |
| Corn Snake | 85–90°F29–32°C | 70–80°F21–27°C | 65–75°F18–24°C | 40–60% |
| Hognose Snake | 88–95°F31–35°C | 75–80°F24–27°C | 65–75°F18–24°C | 30–50% |
| Crested Gecko | 75–80°F24–27°C | 68–75°F20–24°C | 65–72°F18–22°C | 50–80% |
| Blue Tongue Skink | 92–105°F33–41°C | 70–85°F21–29°C | 65–75°F18–24°C | 30–50% |
Frequently asked questions
What is the best way to measure reptile temperatures?
Use a digital thermometer with a probe, or an infrared temperature gun for surfaces. Measure the basking surface where your reptile actually sits, the floor on the cool side, and the coolest point at night. Stick-on dial thermometers are often several degrees off and should not be relied on.
Why does my reptile need a temperature gradient?
Reptiles cannot make their own body heat. They move between warm and cool areas to reach the temperature they need for digesting, resting and fighting infection. An enclosure that is the same temperature everywhere takes that choice away, so aim for at least 10°F (about 6°C) between the warm and cool ends.
Do reptiles need heat at night?
Most species on this site are fine with a night-time drop, and a small drop is natural. Heat at night is needed only when the room falls below the night range for your species. Use a heat source that gives no light, such as a ceramic heat emitter, on a thermostat, so the day and night cycle is not disturbed.
How do I raise humidity for a ball python?
Use a substrate that holds moisture, such as coconut husk or a soil mix, and keep it slightly damp. Add a larger water bowl and a humid hide, and cover part of a mesh top to trap moisture. Mist lightly if needed, but avoid soaking the enclosure; constantly wet substrate with poor airflow can cause skin problems.
What reading should I trust if my thermometers disagree?
Trust a calibrated digital probe or infrared gun over dial gauges. You can check a probe thermometer by putting it in a glass of ice water, which should read about 32°F (0°C). If two digital devices still disagree by a lot, replace the batteries or the cheaper device.
Sources
- Merck Veterinary Manual — Management and Husbandry of Reptiles
- VCA Animal Hospitals — Bearded Dragons: Housing
- VCA Animal Hospitals — Leopard Geckos: Care
- VCA Animal Hospitals — Snakes: Housing
- Wildwood Veterinary Hospital — Ball Python Care
- Baines F. et al. (2016). How much UV-B does my reptile need? The UV-Tool, a guide to the selection of UV lighting for reptiles and amphibians in captivity. Journal of Zoo and Aquarium Research 4(1): 42–63
- ReptiFiles — Bearded Dragon Temperatures & UVB
- ReptiFiles — Leopard Gecko Temperatures & Humidity
- ReptiFiles — Ball Python Humidity & Temperatures
Where sources disagree we show the range they share. See our sources and methodology for how every number is checked.