Thunderstorms.

My Sims had their first thunderstorm, in summer.
They were either tense or sad about it, which is kind of realistic.
Small problem was when my toddler needed to go to bed, she kept getting "Run Inside" and interrupting the action que for either parent to read her to sleep. Just to be clear, she was already inside. It dragged bedtime out for ages which again, is realistic, but slightly annoying.

Then I not-really-intentionally tortured my poor Sim by sending her out to paint a mural in the pouring rain, so she could complete at least one of her work from home tasks as a critic. I think I might be lucky she didn't get hit by lightning.