Now I see the sentence. It is hidden at the top!

"Please enter the hours you thought about the weather."

This may refer to the number of hours (5 hours, for example).

Alternatively, it may mean the hours during which you thought about the weather (3 PM - 6 PM, for example).

Do you have more context to help you decide?

--------------------------------------------------
Note added at 32 mins (2016-10-26 08:03:21 GMT)
--------------------------------------------------

Is it really about the weather, or does it refer to a medical condition? This is a common question on medical questionnaires and usually refers to the number of hours. You may be able to tell from the space allotted for the answer on the form. You can also ask the client something like:

"I assume this question refers to the number of hours. Is that correct?"

Or you can tell them that it sounds ambiguous.

--------------------------------------------------
Note added at 1 day3 hrs (2016-10-27 10:33:25 GMT)
--------------------------------------------------

After receiving two disagrees on my answer, I would like to clarify my stance, which I think I did not explain fully.

The way the sentence is written ("Please enter the hours you thought about the weather.") means what Daryo and others have said: a period of time (3 PM to 6 PM, for example, as I mentioned earlier). I agree with them on this.

In my opinion, however, it would be unusual (but not impossible) for a medical questionnaire to ask for the information in this manner. Usually, the questions on such questionnaires say something like:

"Please enter [b]the number of hours[/b] you thought about your headache (or other medical condition)."

If you are able to see the entire questionnaire, the response field should offer clues. Is it a single blank space to record the number of hours...or are there "from" and "to" fields in which to record the answer?

Either way, I think it is something that should be clarified with the client. I have worked on dozens of questionnaires, and they have always asked for the number of hours the patient spent thinking about their condition.

I am not saying that the questionnaire has to fit the pattern that I have always seen. But this phrasing would certainly make me take a closer look and want to confirm the accuracy.

It was wrong (above) for me to say:

"This may refer to the number of hours (5 hours, for example)."

What I actually meant was:

This [b]may have been intended[/b] to refer to the number of hours (5 hours, for example).

If this was the [b]intention[/b], then the sentence should be modified to reflect the proper meaning.

Otherwise, it simply means "the hours during which you thought about the weather."