Unfair Weather

It was nice hot sunny day at my back yard,thought it would be this nice for the rest of the week.I asked my friend to come over for the day thought if we could swim.As soon as he arrive the thunder started to struck and the cloud start getting darker.We went inside my house but then the weather changed dramatically back to the nice weather earlier,I said how on earth could the weather change so dramatically horrible.My friend said its better to stay inside or else maybe this strange weather will keep switching strangely.