I have actually talked with a wildlife biologist from the NWTF about that same subject. His answer to me was "We really dont know how thw weather plays a part in weither a turkey gobbles good or not". He told me that they have studies going on right now testing this subject & whenever the results are in of course they will be published. I've heard several "know it alls" & "old timers" say it has alot to do with barameteric pressure, some say the temp., some say the humidity. I do not believe anyone really knows how the weather affects gobbling. My personal opinion, which I know doesnt matter very much, from my own personal experiences is that the weather has very little to do with it. I believe it is all in the hormones and the temperment of the bird. Reason I say that is because I've been hunting in all kinds of weather rain, sunny, cloudy, windy, calm, lightening, thundering. All except snow (we dont get much snow in Alabama) & in each of those different weather situations I have sometimes heard birds and sometimes I have not. A quick story, 2 years ago on the last day of the season my stepson & I went in the evening, drizzling rain, lightening, thundering, windy. Most folks would have said we were stupid for going. I picked out the loudest, raspyest mouth call I had & he & I went to a field were I thought some birds were. I glassed the field & approx. 200-250 yards I glassed 2 longbeards standing in the field alone. With it thundering & wind blowing & raining, I yelped as loud as I could. While looking through the bino's (I really didnt believe they would hear me because it was so windy)I saw the birds head shake forward in the way it does when they gobble but I never heard him gobble because of the weather. I turned to my stepson & said "He gobbled @ my call" & when I looked back @ them, both of them were headed straight for us. 2 minutes later we were carring one of them back to the truck (a good 3 year old I might add). Anyway I believe the weather does have some effect on gobbling but I believe it is mostly the personality and temperment of the bird. Again, just my opinion.