• Some of the links on this forum allow SMF, at no cost to you, to earn a small commission when you click through and make a purchase. Let me know if you have any questions about this.

Thermometer Question (WSM 18.5)


Fire Starter
Joined Jan 5, 2014
I know that the dome thermometer isn't the most accurate and I haven't had a chance to go out and get a wireless thermometer yet, but does anyone else use a simple weber digital meat thermometer and stick it through the rubber probe hole on the side? 

It stays horizontal and seems to read accurately... just checking to make sure whether a thermometer meant to measure internal meat temps should be trusted as a general grill temp thermometer, too.

thanks for any feedback.

Scott.. smokin' in Chicagoland.


Meat Mopper
Joined Dec 4, 2013
Should be close enough. I've set them out on a table to check ambient temps before, same theory.


Master of the Pit
OTBS Member
Group Lead
Joined Nov 18, 2010
you said the probe is rubber? if so i would be hesitant to use it to monitor the smoker heat because its much greater then internal meat temps...it may melt? or ruin the probe?

mr clean

Joined Jan 20, 2014
On my 18.5 the dome is 20 degrees cooler than the rack. Check it at the dome and see if it about the same as the one one the WSM. Stick it in the vent hole.


Master of the Pit
OTBS Member
★ Lifetime Premier ★
Joined Feb 4, 2009
My dome thermometer reads 25-30 degrees cooler than the actual temperature in my 18.5 WSM.  I would think a instant read would be more accurate.

I just use a digital thermometer in the meat and one just below the rack the meat is sitting on just to make sure.

As long as your dome thermometer keeps reading 20 degrees cooler consistently, just adjust accordingly as to what temperature you wish to use.

I hope this helps,  John
Last edited:


Fire Starter
Thread starter
Joined Jan 5, 2014
@dougmays, the probe isn't rubber.. I stuck my temp probe THROUGH the rubber portal on the side of my WSM 18.5... sorry for the confusion

thanks all for the feedback... Those saying the dome is typically about 20 degrees cooler than internal are having an experience right on with what I'm seeing... really consistent too, though a little bigger of a spread in windy conditions.

Snowing in Chicagoland today.... I think I'll fire up the smoker... just so the snow doesn't build up on it!  ;)
Last edited:
Top Bottom
  AdBlock Detected

We noticed that you're using an ad-blocker, which could block some critical website features. For the best possible site experience please take a moment to disable your AdBlocker.