I just got my bill from SECO. My two vacant months so far this year were:
$58 (12 KWH/day) and $71 (16 KWH/day).
The same periods last year were:
$48 (11 KWH/day) and $53 (11 KWH/day).
Interesting data. I need to first verify there is not a refrigerator open

, but it is unclear to me why it is higher. Has it been hotter or more humid?
FWIW, I also use a humidistat. The thermostat is set to 80 and the humidistat to 60.