The lecture notes, I stated that comparing short-term weather forecasting to long-term climate forecasting is like "comparing apples to oranges". Explain what I meant by that and why that is the case

groups of items that compared but cannot be practically compared.

Explanation:

The case belongs to the idioms and refers to the apparent distinction between the to incomparable items. As the shot and the long and the big and the smaller are both practically incomparable and have distinctions though both belong to the same category of the items as fruits.