PBIR dragway humidity today in palm beach, fl
Humidity:82 %

Speedworld dragway humidity today in whittmann, az
Humidity:21 %

NOAA links:

FLORIDA:
7-Day Forecast for Latitude 26.69N and Longitude 80.05W

ARIZONA:
7-Day Forecast for Latitude 33.71N and Longitude 112.66W (Elev. 1637 ft)

I have noticed that my car runs up to .5 seconds slower and 2 to 3 mph slower when the humidity is high. In fact, I ran this summer on a 67 degree night with 97% humidity (humidity is always horrible here) and my best time was a 12.2@113.9xmph. I ran back the following weekend and had much better times. My old car DID THE EXACT SAME THING when the humidity was high. Every single time it would run slower with high humidity even if the temps were nice and cool. Humidity has a huge impact on FI cars, much more than temps.

That has always been my experience with humidity, I know a few guys on here that would agree with that statement as well. High humidity really sucks. The east coast typically has high humidity and the mid-west has low humidity for the most part.