Do current forecast models work with climate change? [View all]

[SoutherDem]

I have noticed something for the last three summers. I realize forecasts are sometimes at best guesses, but for the third year I am noticing a trend. The long term forecasts predicts the high temperatures are close to average toward the end of the 7 or 10 day period but as it but the short range forecasts show temperatures above average and the actual temperature ends up being above average.

So my question is has climate change made the forecasting models useless?