average weekly wind speeds for 1 month daily relative humidity levels for 18 months total annual precipitation amounts for 2 years average high and low monthly temperatures for 20 years
I gave my students this multiple choice question: Which of the following data would be most useful for describing the climate of a specific area?

Only one answer is correct among these 4 choices:
- average weekly wind speeds for 1 month
- daily relative humidity levels for 18 months
- total annual precipitation amounts for 2 years
- average high and low monthly temperatures for 20 years

Could you tell me which one is correct?

average high and low monthly temperatures for 20 years