BradNorthGA It took me several years to realize that I needed to start the BGE longer in advance than a gas grill, or a charcoal kettle.
I did an overnight brisket Friday into Saturday. I went out to light my BGE at 4PM for a 6PM cook start. It was frozen shut (10* outside)! 45 minutes with a heat gun...

Then I did exactly like always. It took a long time to heat soak the ceramic, the brisket went on some time around 6:30.
Outside temps will affect final vent settings somewhat. Not a lot, but some. You shouldn't notice a difference in GA. Here in PA, it might be 100*, or it might be -2*.
I did an overnight brisket Friday into Saturday. I went out to light my BGE at 4PM for a 6PM cook start. It was frozen shut (10* outside)! 45 minutes with a heat gun...
Then I did exactly like always. It took a long time to heat soak the ceramic, the brisket went on some time around 6:30.
Outside temps will affect final vent settings somewhat. Not a lot, but some. You shouldn't notice a difference in GA. Here in PA, it might be 100*, or it might be -2*.
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