Meanwhile, if they only gave a monthly figure, one could wonder if it's an average or if it's taken in January or July.
This is why there has been a big push for offshore wind in the UK, it's an island that has strong winds during winter.
We heat with a wood burner and so have very flat usage over a year. Heating requirements are lower here in Auckland, New Zealand.
People tend to eat/drink more heated things than during summer (think coffee maker and microwave ovens).
They also tend to spend more time inside due to the weather so they use things needing electricity (TV, computer, radio...).
Still since a couple of years ago bills have to be paid according to monthly (sometimes bimonthly) real consumption. I had the feeling this was even a regulatory requirement to make people aware of the real costs and encourage saving. Cannot find a reference to that now. Either I remember it wrong or the search results are just too polluted by marketing pages.
All meters are read remotely with hourly precision. An increasing share of households has spot price contracts. So the price changes every hour. Sometimes negative, sometimes 60 cents/kWh or more to mention the extremes. Switching to 15 minute pricing is on the way already