Yeah, frankly Celsius is very easy for weather temperatures in temperate environments. Snow and ice is approx 0, room temperature approx 20, a hot summer's day approx 30 and it won't reach 40 unless you go on holiday in a desert region. Easy to approximate on a small range (and the nominal extra precision of Fahrenheit is illusory for talking about weather anyway because you care far more about humidity and wind than sub 1 Celsius differences)