If the temperatures are in fact the same as last year, then I would think you would be using less kWh.
Have you purchased anything new in the last year like a new TV? (These can use more electricity than the old TV's.)
You could have a slow water leak and this is making your well run a bit more. This could be difficult to find or detect. With city water, there is a water meter and you can shut off all water for an hour or half a day, read the meter, then go back in an hour or half a day and see if the meter has changed.
But I don't suppose you have a water meter on your well! Sometimes you can place your ear to faucets inside and outside and to water pipes and hear a leak. I would check everywhere. If you have a crawl space under the house, check there for leaks. You can also sometimes walk along the path the water pipe goes from the well to your house and find a "squishy" wet spot where the pipe is leaking.
Then of course fix obvious leaks like dripping faucets, running toilet, etc.
The only other thing I think it could be is your heat pump. Be sure you hear the outside unit running when it is heating. If this unit is not working, then it uses electric coils inside instead (more expensive). On very cold days, the outside unit can't heat and it would switch to the inside coils. But this would happen more often if it was colder this year than last year and you said this is not the case!
Be sure to vacuum under the refrigerator. If lint is blocking, it works harder to cool the refrigerator.
Also clothes dryer. Check outside vent to be sure air is coming out and the vent is clear. Clothes dryer not running longer is it?
Then other than that, you have a new house and should have good insulation. You have energy saving bulbs. If things get desperate, you can turn off the water heater and take fewer showers. Just turn on water heater for 15 to 30 minutes a day for warm water. Or on for an hour before a shower, then off. An electric water heater can be 30% of an electric bill.
Also can wash clothes in cold water. Don't use dishwasher, wash dishes by hand.
More energy saving tips...
P.S. You can get power strips which don't have a lighted switch, just an on/off switch without the light and plug in things which you can turn off when you are not using them. This saves a little. Like microwave, TV's, stereo, coffee maker. Things with electronic clocks or remote controls.
Regular phones (not wireless) which plug in will work without being plugged in, just can't use the speed calling or non dialing features.
Unplug chargers like for cell phones when not in use. Basically unplug things or turn off with a power strip when not using it. Almost everything these days still uses a bit of electricity when "switched off"!