Could a stroke cause a headache (left temple pain) that lasted for an hour and has not come back ? no other stroke like symptoms and its been 12 hours since headache?

No, stroke does not manifest with just a temporal headache. A headache with that character can happen to anybody so you only worry if you have other associated symptoms or if the same headache recurs often then you should see your doctor.

If you did not have any other symptoms like loss of movement, difficulty in vision, loss of consciousness, seizures, loss of sensation, you are unlikely to have suffered a stroke.

A left sided headache lasting one hour is neither representative of a stroke nor a transient ischemic attack, and is not an unusual occurrence in most 40 year old adults. Not clear as to why you fear a stroke. If you have risk factors such as hypertension, diabetes, hyperlipidemia, have your doctor closely monitor your health status.