Its 13 degrees with a wind chill of 3 (great smoking weather!). I have a pork shoulder in the smoker. I usually try to cook a shoulder at 225. Its so cold outside that my flame is a little higher/bigger than normal. I've been adjusting the flame, vents, and exhaust for about 45 minutes now. The closest I can get is 239 to 240 (Maverick ET-732). Will the 15 degrees make that big of a difference?