One of the best affordable temperature/humidity sensor I'm aware is the SHT35. It has a temperature accuracy of 0.1°C and a humidity accuracy of 1.5%. I agree with DrAzzy that you probably won't get much more accuracy with standard components.
One of the best affordable temperature/humidity sensor I'm aware is the SHT35. It has a temperature accuracy of 0.1°C and a humidity accuracy of 1.5%. I agree with DrAzzy that you probably won't get much more accuracy with standard components.