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.
Puffing away since the early 90s. Still going strong.
I've had the whole taste bud change thing happen to me before. when that happened, I ended up wandering to smoking pipes. now that my taste buds are back I spend even more money on tobacco stuff than i really should.
This always happens to me a day or two before I get sick, which happens a lot more often with a toddler in the house now. You said you're not getting sick, but maybe the changing weather and humidity are bringing on an allergic/asthma-type reaction which can definitely cause your tastes to change.
Either way, I'd recommend taking a week or two off and trying again.
"You can imagine where it goes from here." - Maude
"He fixes her cable?" - The Dude
"Don't be fatuous, Jeffrey." - Maude
Don't despair, seems a lot of folks here go through bad spells, and that's all they turn out to be, just spells.
I think the weather may be at play, because I too am finding old favorites, and by old I mean from just last summer, now falling kind of flat. Not harsh like you are experiencing, but for me too, think it is just a spell. Good luck.
I would add some scotch to that water,,Always makes my sticks taste better..other than that I would keep an eye on the RH such as has been mentioned and pray for an early spring.
“Yesterday is history, tomorrow is a mystery, today is a gift of God, which is why we call it the present.”
― Bil Keane
Happened to me once and the only thing that helped was to give my tastebuds a long rest. It was tough but after a week my cigars never tasted so good.