Noticed this myself a few times actually. There's something about the electromagnetic buildup before a storm that I reckon interacts with whatever energy poltergeist activity runs on. The pressure changes too - not just the lightning itself but the hours before it hits.
Had a strange one at my sister's place in Macclesfield a couple of years back, things moving around in the kitchen right as a big storm was rolling in from Wales. Could be coincidence but it felt like the atmosphere was almost charged in a way that something was taking advantage of it.
Worth tracking if anyone hasn't already - keep a simple log of any activity with the date and time, then cross-reference with weather data afterwards. You might surprise yourself with how often they line up.
Anyone got actual records of this or is it more of a gut feeling for most people?