No offense was taken.
Yes, the number of hogs shot is not a diagnostic criterion of whether or not the heat is the cause for not shooting more hogs this summer versus last summer, particularly given that this summer is not significantly hotter than last summer. In fact, in surveying various east Texas towns, it would appear that the overall averages run from comparable levels to this summer being 1-2 degrees cooler to 4-5 degrees cooler than last summer. So it would be hard to blame the heat for the change in hunting success between last year and this year when this year isn't significantly hotter. Therefore, there must be some other factor(s) influencing the change the number of kills.
Interestingly, dew points have been comparable to slightly higher, but that usually comes with more rain, something seen as a good thing for hog hunting. Variability of temperature has been wider with the highs being higher and the lows being lower for this year in some areas, but overall, the temps have been lower on average. On average, the winds are up over last year in several places. From the 5 towns I am surveying, wind is up in all 5.
Aside from these influence, there is everything else going on in the area such as hunting pressure, human activities, food availability, water availability, and natural patterns. It is hard to say that the heat is reason for less hunting success this year over last year when there are so many other things going on that cannot be controlled for and when the heat doesn't appear to be significantly worse.