Pretty much sounds like typical package weather in Alberta.
If your boxes are light coloured, you can stretch a black garbage bag
over everything to help with a little solar heating and it seals any
gaps around the top.
If your concerned about the price of styrofoam and have access to wood
shavings, you can throw some in a barrel liners and make pillows (4-5"
thick) which will cover multiple hives pushed together.
Dave Tharle
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