It is an indication of a future weather condition. It is an indication of the amount of humidity. It is an indication of weather at a specific time. It is an indication of the existing climate.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: In which way is any single observation of wind speed best described?
Possibilities:
- It is an indication of a future weather condition.
- It is an indication of the amount of humidity.
- It is an indication of weather at a specific time.
- It is an indication of the existing climate.

It is an indication of weather at a specific time.