I have been traveling through Kansas the past few days checking electric fence and cattle ranches. The early cold weather has definitely slowed things down. and many for the grasslands have a thin layer of snow. Cattle seem to be foraging where they can. It should warm up from the unseasonably cold weather soon.
Electric fences using AC or Mains powered fence chargers in the area are uneffective from the bad weather. They can use more power from the power company when needed.
Battery powered energizers may be effective from the cold because the battery used may be run down faster.
Same with solar powered energizers that use a battery.
The lesson here is to buy the right electric fence charger for your needs. and plan for bad weather.