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SESK: Stuff Everyone Should Know · sesk.info/small-guinea-pig-heat-stress

Above about what temperature can guinea pigs get heatstroke?

About 85 degrees F (29 C).

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  1. About 85 degrees F ✔
  2. About 60 degrees F
  3. About 45 degrees F

Why: Guinea pigs are comfortable only in a narrow range, about 65 to 75 degrees F. Above about 85 degrees F they can get heatstroke.

Huh, didn't know that: Guinea pigs prefer low humidity, below 50 percent.

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Why did the guinea pig sit by the fan? He was a hot potato.
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References

Answer: About 85 degrees F. Guinea pigs are comfortable only in a narrow range, about 65 to 75 degrees F. Above about 85 degrees F they can get heatstroke.

  1. Merck Veterinary Manual: Unique Needs of Guinea Pigs www.merckvetmanual.com/all-other-pets/guinea-pigs/unique-needs-of-guinea-pigs
    Temperatures above about 85°F (29°C) can cause heatstroke.
    Checked 2026-10-11.

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