1
anemometer

n. a weather instrument that is used to measure wind speed.
2
rain gauge

n. a weather instrument used to measure the amount of precipitation (water) that has fallen to the ground from clouds.
3
thermometer

n. a weather instrument used to measure the temperature of the local atmosphere.
4
wind vane

n. a weather instrument used to find out wind direction. It points to the direction FROM where the wind is blowing.