ok teh answer would be
En Invierno "hace frio" because invierno means winter and in winter the temperature is cold and "hace frio" means It's cold, so that is why this answer suits your question
For more information
"hace calor" means it's hot
"lloviendo" means it's raining and
"esta caliente" means it's hot just so you know that the answer I gave you is correct
Hope this helped