A few factors to take into consideration:
1. Per your profile you're in GA, that's not a state that's used to cold weather. Your cigars could be slightly dry and be smoking differently due to faster burn, etc. This will change the flavor.
2. Temperature matters. Something I was taught several years ago, and I've found to be true, is smoking in cold weather is not as enjoyable as smoking in comfortable weather. The reason is our bodies are not comfortable. But, more importantly it's our sinuses. When it's cold our sinuses aren't operating as normal. If you smoke "Cigar A" in a 75 degree room, and then smoke the same cigar in a 40 degree room...the flavors are different. Also, people tend to smoke faster when it's cold. This leads to a hotter cigar which can lead to a "harsh" taste.
There are other possible factors of course, but take into consideration the above two.