How many degrees is it?
'Quanti' — QUAN-ti. Stress on the first syllable. 'Gradi' — GRA-di, clear double-syllable.
Use to ask about the temperature — one of the most basic weather questions. Italy uses Celsius exclusively.
'Quanti gradi fa?' literally asks 'how many degrees does it make?' — using the weather 'fa' construction. This is the standard way to ask about temperature in Italian. The answer uses 'ci sono' or 'fa': 'ci sono trenta gradi' / 'fa trenta gradi'.
Che temperatura c'è fuori?
What temperature is it outside?
More formal — 'temperatura' is the technical term
Segna trentadue gradi.
It shows thirty-two degrees.
'Segnare' (to show/mark) — used for thermometers, car dashboards, phones
Con il percepito sembra di più.
With the feels-like temperature it seems more.
'Percepito' = perceived/feels-like temperature — modern weather app vocabulary
Italy uses Celsius exclusively. 'Gradi' always refers to Celsius. The concept of 'temperatura percepita' (feels-like temperature, factoring in humidity and wind chill) has entered everyday Italian vocabulary through smartphone weather apps.