- Oral temperature ≥99.5°F (≥37.5°C) / axillary temperature ≥99.5°F (37.5°C) / rectal temperature ≥100.4°F (≥38.0°C) / tympanic temperature on oral setting ≥99.5°F (37.5°C) / tympanic temperature on rectal setting ≥100.4°F (≥38.0°C)