Eight kinds of weather, each named aloud. Weather is one of the few topics a young child can check against the world every single morning, which makes it unusually easy to rehearse — look out of the window, then find the card that matches.
Ask what the weather is doing before you go out, then run the matching card. Daily repetition against something real is what fixes the words.
Most children can name sun and rain around two or three. Less common words like fog and storm usually come later.