Can Compost Worms Survive Winter?

by Sam Richards | Last Updated: August 25, 2020

Taking care of compost worms can be an overwhelming process, especially if you are a beginner. Among others, one of the most important concerns would be the environment where they grow. The temperature is a crucial factor that will influence their survival.

Can compost worms survive winter? If you are curious, read on, and we’ll let you know the answer. We’ll also talk about some of the best things to do to make sure that worms will thrive in the composting bin once the temperature starts to drop.

Will Compost Worms Survive the Cold?

Yes, compost worms can survive winter! However, this is the case only if you engage in proactive measures to create the ideal habitat. The body temperature of worms will be largely affected by their environment, so you need to do something to make sure that they will thrive even as it gets cold.

Worms have natural instincts. They have natural resilience, which will help them survive adverse environmental conditions. However, this does not mean that you can just leave them outdoors to freeze in the winter. To let them survive, you need to do something.

The Ideal Temperature for Worms

According to the California Integrated Waste Management Board, the best outside temperature for composting would range from 55 to 77 degrees. When the temperature outside is within that range, which is usually the case in the winter, worms can suffer. It can slow their growth and reproduction. Worst, it can also kill worms, especially if it gets below 40 degrees Fahrenheit.

Below, we’ll talk about some of the things that can happen to the composting worms in the winter:

How to Make Worms Survive Winter

With a little effort and time to spare, it is possible to make your composting worms survive winter. Below are some of the most important things to do:


In sum, it is possible for worms to survive in winter. They are naturally resilient and they use their instinct to adapt to the external environment, especially when it gets cold. However, worms can only do so much. The conditions of the compost will be affected, the reproduction rate will slow down, and worms can die! With all these things, it is crucial to have a proactive approach when managing the compost bin to ensure the survival of worms.