I believe something like 10 out of th last 13 years are known to be the warmest years on record, which sounds extreme to me. I also notice daytime record highs in the summer last longer into the night ie temperature 95 plus degrees at 12 midnight two years ago. Summer days are hotter and not calculated into weather record are hotter summer nights.
It's hard to say. We don't have enough data to REALLY make a firm conclusion.