Furthermore, I cannot recommend highly enough to anyone whom wishes to see the aurora for yourself--from experience I can highly suggest that the finest period is the four weeks surrounding 01 September. Presently, auroral displays and also natural-radio phenomena are at a minimum due to overall minimal solar-activity as we approach deep Solar-Minimum, although some report signs of the coming Cycle 25 with new Sunspots occurring at high solar latitude already). Aurora appears most frequently and brightly during the equinoctal periods around September and April (due to the alignment of Earth's magnetic-field and the IPF). Periods of fast solar-wind streams (>500 to 600 km/sec speeds) will often produce nice aurora and potentially a magnetic storm, too.
Thus, late August through mid-September will definitely present the warmest weather for viewing (short sleeves/pants weather!) Summer Prairie-Beauty Canadian weather! Do head for Canada's High Plains/Boreal Forest region in late Summer. To be deep into the optimal locations under the auroral-oval for the most superb Aurora enjoyment, journey up to Thompson, Manitoba or Hay River, NWT (as I did in June 1996). Find an electrically-quiet location and enjoy the ELF-VLF show, too! SpM.
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(my friend was riding my nice Trek to take this flash photo long ago... near Swansea, Calif. "ghostlette-town.")