Running In Humidity

We are in the monsoon season here in Arizona. The humidity levels go, from almost nothing, to the 80's that help cause the Monsoon storms and much needed rain. The rains do help to cool down the temp's and in turn allow me to still get out to do some runs in the morning. I have noticed that my runs have been harder. The air feels much heavier and that makes running my normal lengths more difficult. Not to mention getting home completely drenched in sweat. It is something I will have to deal with for now. Unless I run indoors. I have to keep training so I am ready for all my races, challenges and mud runs.