Your average power consumption
increase is about 1.5 kilowatts, assuming something new is running 24 hours. You might look at the power consumption of typical home appliances in
these charts.
Oddly most of them are listed in kilowatt hours per hour! LOL, instead of just watts or kilowatts.
Look for something new in the October cycle from that list. If you don't have anything new, look at the high energy consumption items to try to determine whether you had unusual usage of those items. Did you have visitors?