In a nutshell, October was cool and slightly wet (with the exception of the north which remained dry).
October was cool enough for unseasonably early snowfalls to accumulate for various parts of the province (not just the north!) in the second half of the month.
See all the details in the attached final report for October and the outlook for fall/winter.
Courtesy of Jill Maepea, Warning Preparedness Meteorologist, Environment and Climate Change Canada