In typical Alberta fashion we went from beautiful sunny +20 (70 degrees Fahrenheit) to freezing in about 4 hours. The ants didn't have time to switch modes yet! We even set snowfall records for our area for the 8th of September, so it was a bit out of character for the time of year, even for Alberta! I would think another month or so of decent fall weather before we have to worry about serious long term cold. Found her under a loose lump of sod sitting on the road out to the field.
Mads