Matching Pairs The weatherOnline version Let's learn about weather. by Daniel Educaplay 1 Temperature is measured in... 2 3 Humidity is the amount of ........................... in the air. 4 When there is a lot of humidity... 5 When the weather is cold... 6 7 The instrument we use to measure temperature is... 8 When the weather is hot... Fog Clouds Water vapour ... degrees. ... temperature is high. ... fog and clouds can form. ... the temperature is low. ... a thermometer.