Expansion and contraction are not the only things you have to worry about at those temps.
http://cable.doit.wisc.edu/resources/cable101/HFC-D%20Coaxial%20Fiber%20Optic.pdf
Scroll down to coaxial cable behaviour with temperature. Before you waist alot of time looking for a suck-out that may not be there. Read this. Sometimes in a system with a extreme temp. change you need to do a summer-winter rebalance but I'm sure you knew that. Just wanted to mention it.
Re: Coax expansion-contraction
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