humidity1, temperature1 = Adafruit_DHT.read_retry(sensor, pin)
time.sleep(0.1)
humidity2, temperature2 = Adafruit_DHT.read_retry(sensor, pin)
time.sleep(0.1)
humidity3, temperature3 = Adafruit_DHT.read_retry(sensor, pin)
humidity = sorted([humidity1, humidity2, humidity3])[1]
temperature = sorted([temperature1, temperature2, temperature3])[1]
Beraktam két mérés közé 0.1s várakozást, ha nem kell, azokat kiszedheted.