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Heating and lighting for pet snakes

Short answer

Snakes can't make their own body heat, so the enclosure needs a warm end and a cool end[1]. Put every heat source on a thermostat, check both ends daily with thermometers at snake height, and never use hot rocks[2][1]. Vets are divided on whether snakes need UVB; VCA says it isn't harmful and may help[1].

Build a gradient

Snakes are ectotherms: their body temperature comes from their surroundings[1]. Heat one end and leave the other cool so the snake can move between them[1]. Use two thermometers, one at each end, placed at the height where the snake actually sits[1].

As a general range, VCA gives a cool end of about 70–75°F (21–24°C) and a warm end of 90–95°F (32–35°C)[1]. Species differ, so use the species figures below.

Daytime temperatures by species, from each species' cited care sheet
SpeciesWarm end / baskingCool endHumidity
Ball python30–32°C (86–90°F)[3]24–26°C (75–79°F)[3]50–60%[3]
Corn snake28–30°C (82–86°F)[2]20–24°C (68–75°F)[2]40–50%[2]
Kingsnakes26–30°C (79–86°F)[4]21–24°C (70–75°F)[4]40–55%[4]
Western hognose90–95°F (32–35°C)[5]70–75°F (21–24°C)[5]30–50%[5]

Thermostats, every time

The RSPCA says every heat source must run through a thermostat, with the probe at snake level, and that you should still record temperatures daily because thermostats aren't always accurate[2]. Heat lamps need a guard so the snake can't touch the bulb[2].

Burns are common, and preventable

VCA's vets say burns happen "all too often" in pet snakes, from exposed lamps and bulbs, hot rocks, or an escaped snake curling up against a radiator[6]. Keep any overhead heat at least 4–6 inches from the highest point the snake can reach[1]. Skip hot rocks entirely[1]. If you use an under-tank mat, put it on a thermostat and ask your vet how to set it up[1].

Night

VCA says night heat isn't needed as long as the enclosure stays at 65–70°F (18–21°C)[1]. The RSPCA's corn snake and kingsnake sheets also let the heat go off at night in a normal home, down to 16–20°C (61–68°F) and around 18°C (64°F) respectively[2][4]. Its royal python sheet calls for non-light-emitting night heat on a thermostat[3]. Turn all lights off at night; the RSPCA suggests a timer, 12 hours on and 12 off[2].

UVB: the honest answer

VCA's vets say veterinarians are divided on whether snakes need UVB, since whole prey is nutritionally balanced, but that UV light "is certainly not harmful and may be beneficial"[1]. The RSPCA recommends low-output UVB for all three of its snake sheets, with lower levels for albino morphs[3][2][4]. For day-active hognoses, Canobie Lake's vets note better activity and feeding with UVB[5]. UVB output fades with age, so replace tubes on the maker's schedule[2].

Humidity

Many snakes do well between 40% and 70% humidity depending on species, desert species need less, and too much humidity causes its own problems[1]. Measure it with a hygrometer; if it stays high, add ventilation[2].

Sources

  1. VCA Animal Hospitals: Snakes: housing
  2. RSPCA: Corn snake care
  3. RSPCA: How to care for a royal python
  4. RSPCA: Kingsnake
  5. Canobie Lake Veterinary Hospital: Caring for your western hognose snake
  6. VCA Animal Hospitals: Common problems in pet snakes

Sources last checked 2026-10-20.