weather forecasting help

https://geology.com/world/world-map.shtml


https://www.timeanddate.com/time/zone/italy/rome

Things to think about: 

Why is weather/temperature/times different all over the world?

Are seasons global?

Does the tropics ever have snow/cold weather? Why or why not?

What causes these temperature differences?

Why was it cold in Moscow and Alaska but warm in Italy and Zambia?