Home » What Temperature is TOO Cold for a Monarch Butterfly?
Butterfly Farming Entomology Monarch (Danaus plexippus)

What Temperature is TOO Cold for a Monarch Butterfly?

Monarch butterflies are cold-blooded, meaning their body temperature is largely determined by the surrounding environment.

Generally, Monarchs become sluggish or unable to fly when exposed to temperatures below 55°F (13°C). Prolonged exposure to temperatures below freezing (32°F or 0°C) can be lethal to Monarchs, especially if they’re not in their overwintering sites where they are somewhat protected from extreme cold.

Monarchs in areas of green are immobile until the temperature increases well above 55°F (13°C). Monarchs in yellow to red areas will be active.
Monarchs just want to be warm!

During their overwintering phase in places like California, Mexico, or Florida, Monarchs go into a state of diapause (a form of dormancy), conserving energy and becoming more resilient to colder temperatures. However, even in these sites, unusually cold temperatures or sudden cold snaps can result in significant butterfly mortality.

Did you freeze a Monarch Butterfly for the Featured Image??

No butterflies are/were harmed in the making of any post. Photoshopped! Knowing the size of a Monarch Butterfly and the typical ice cube, it is clear the Monarch is “too big” for this to be a real photo. Further, I chose not to show any images of actually frozen butterflies, although they exist. <3 Johnny

Leave a Comment