MenuTemperature is a small utility for continuously measuring your computer's CPU temperature and frequency.
MenuTemperature provides averages, minimums and maximums as well, and lets you set the interval at which gauging takes place.
Current values are displayed prominently in the menu bar, as a status item, although you can decrease the font size if you find it too distracting, or if it simply takes away too much space. MenuTemperature is able to display the values in either Fahrenheit or Celsius degrees.