With all the usual reminders that you assume all risk for any mods, a 0-10K variable resister (radio shack) will allow you to drop your "temps" during summer (10K) and then back to normal during winter (0K).
I had to install one due to a unrelated problem. I had high RPM cutout and by adding a resistor to the IAT circuit I got rid of the problem.
10K resistance drops your readings 20-25 degrees F as I recall.
I think ambient from the IAT is around 8K ohms.
Now as to whether or not this is safe, I can't answer that. I can tune my Viper so I am not worried about effects of this mod. In a stock condition can't say.
Thank You. I will take your advise.
IMHO, if you don't have the smooth tubes and K/N or other filter, do that and forget this.