Aims: The aims of this study are to explore the perspectives of patients regarding rectal temperature measurement and to identify factors of importance and discomfort during rectal temperature measurement. Method: The study was a cross-sectional survey based on a questionnaire with a descriptive and comparative design. A questionnaire was developed and carried out with 81 respondents. The final response rate was 89%. The study was carried out in January 2013. Results: The respondents prefer to have their temperature measured rectally rather than in the ear. The patients reported no discomfort during rectal temperature measurement. Discussion: The results may contribute to or be used as an argument for implementation of the national clinical guideline on noninvasive temperature measurement. Conclusions: The use of any other method than rectal measurement cannot be argued from the perspective of the evidence, the patients’ preferences, or the feel of discomfort during rectal temperature measurement.