You can use the DHT22 (or AM2302) humidity/temperature sensor and the Arduino UNO board to read data and print it out to the serial monitor or to display it on an LCD ...

Important: Place a 10kΩ pull-up resistor between VCC (Pin 1) and DATA (Pin 2). Without it, the sensor will give incorrect or no readings. This is only if you are not using a DHT22 module Temperature — ...

If you bought your DHT22 from AliExpress, eBay, or similar marketplaces and get readings like -3276.7°C in freezing weather — you likely have a clone sensor. This library fixes that. This library ...