What are the options for measuring temperature in the WSM?
Starting with the 2009 model year, all WSMs come with a built-in lid thermometer as standard equipment. If you have a 2008 or earlier WSM, your cooker did not come with a thermometer. There are three ways you can measure temperature in the cooker: through the lid; through the middle cooking section; and at the cooking surface. See Measuring Temperature In The WSM for details.