Adafruit Industries Adafruit Industries BME280 I2C/SPI Temperature Humidity Pressure Sensor
This precision sensor from Bosch is the best low-cost sensing solution for measuring humidity with 3% accuracy, barometric pressure with 1 hPa absolute accuraccy, and temperature with 1.0C accuracy. Because pressure changes with altitude, and the pressure measurements are so good, you can also use it as an altimeter with 1 meter or better accuracy!
Adafruit Industries BME280 I2C/SPI Temperature Humidity Pressure Sensor
Usually ships in 5-7 business days. Limited availability. May not be in stock at time of order. No back orders.