how to keep rain barrels from freezing
Place the rain barrel along a south-facing wall to keep it as warm as possible, if it is going to be used in winter. Disconnect hoses to avoid accidental freezing and damage to fittings. Leave the spigot open except when collecting water for a specific purpose. Prepare for major winter rain storms.
Reattach the barrel's overflow hose when a storm is predicted so the barrel won't overflow into the home's foundation. Disconnect the rain barrel from the gutter downspout if it won't be in use during the winter months. Attach an extender to the downspout to divert water away from the home's foundation. Flip the rain barrel over away from the house's foundation and completely empty it. Store the rain barrel and accessories in a garage or garden shed if space is available. If not, place it upside down in a sheltered area of the yard.