Glad your brought that article back up, Tee. This is the perfect time for folks to start a worm bin...warm weather is on the way, new life is springing forth, garden time is right around the corner for many of us.
Sherri, I kept my main bin outdoors for a number of years and I think we get colder here than your zone 8. There were some cold nights sometimes but I put in a small (very small) wattage light bulb to keep the bins warm and active. My bin was an old chest freezer and it worked perfectly; the insulation in a freezer buffered the temperature extremes, keeping it cool in the hot summers, mostly keeping it from freezing in the winter. The light bulb kept the soil warm and kept the worms from going "dormant", making the bin activity year round.
I also used a heat tape for a while, too. You know the kind you lay out on a bench/table and put plant flats on for good germination. That works, too, and those come complete with a thermostat on them.
If you can keep a bin in your garage, work shop, or the like though I bet you won't need either the light or heat tape.
Shoe