First of all, meteorologists are interested in them because it is their profession.
Workers of tourist agencies should know specialities of weather and climate of the countries to which their clients want to go.
Agricultural workers (сельхоз работники) also need to be aware of the weather in order to ge the best harvest.
And, of course, pilots, especially civil aviation pilots (пилоты гражданской авиации) need the most precise weather forecasts!