The meteorologist lives with the day-to-day of weather. Everything is chaos when it comes to two weeks ahead, and he has come to understand this in his bones. But there are laws to chaos. No one can look at a penny mid-flip and say for sure which way it will land. But anyone can say that about half the flips will be heads, if the flipping goes on for hundreds of flips.
That's the difference between weather and climate. No weatherman's career lasts long enough for that "climate" part of the story to unfold decisively, just on his own watch. A two-degree C warming over the course of a century is invisible over the course of 25 years, especially when all your professional focus is on the drought here, the heat wave there, and the cold snap over yonder.