[werk_ag]

For outside readings, my recommendation is using an SHT1X.
SHT10, SHT11 or SHT15 depends on your budget.
The SHT2x range is also very good, but you should understand that connecting and using a SHT2X it not as easy as a SHT1X.

For inside readings an DHT22 is just fine, an HTU21D is better.