More than 700 posts and you still didn't learn to post the necessary information. Please, please, please, please always add links to the used hardware and libraries. You waste our time if you let us google for that stuff just to find another version of the library or hardware than you're using and in the end we've to do everything twice.
I am wondering if the problem is being caused by the 8MHz clock frequency of this mini?
If you're using this library GitHub - adafruit/DHT-sensor-library: Arduino library for DHT11, DHT22, etc Temperature & Humidity Sensors, specified the correct type in the code and the correct board in the IDE, this shouldn't influence the result. Post your sketch.