Thermocouple amplifier is an outstanding analog-output amplifier that is easy to use.
This pressure sensor from Freescale is a great low-cost sensing solution for precision measurement of barometric pressure and altitude.
The BMP180 from Bosch Sensortec is the latest in the line of barometric pressure sensors and this breakout board makes it easy to interface with an Arduino.
This is an evaluation board for the MLX90614 IR Thermometer.
Now mounted on a breakout board, the MPL115A1 is a digital barometer that uses MEMs technology to give accurate pressure measurements between 50kPa and 115kPa.
This is a pre-wired and waterproofed version of the DS18B20 sensor.
This is a breakout board for the Bosch BMP180 high-precision, low-power digital barometer.
The Weather Shield is an easy to use Arduino shield that grants you access to barometric pressure, relative humidity, luminosity and temperature.
This product is a high accuracy temperature and humidity sensor used in home conditions.
Whether you're an agriculturalist, a professional meteorologist or a weather hobbyist, building your own weather station can be a really rewarding project.
This is a breakout board for the incredibly small TMP102 digital temperature sensor. The TMP102 is a digital sensor (I2C a.k.a. TWI), has a resolution of 0.0625°C, and is accurate up to 0.5°C. This is a very handy sensor that requires a very low-current.
This is a breakout board for Honeywell's HIH-4030 humidity sensor. The HIH-4030 measures relative humidity (%RH) and delivers it as an analog output voltage.