Why is it difficult to tell what the weather might do sometimes?\nOptions:\n- clear\n- unpredictable\n- important to farmers\n- hot or cold\n- mild
Please answer the following question by reasoning step-by-step.
unpredictable
The weather cannot be predicted by anyone.

Because the weather is unpredictable so it is difficult to tell what the weather might do sometimes.

.

So, the answer is unpredictable