Rome's winters are mild, with temperatures ranging from around freezing point to the mid-teens Celsius in January and December, averaging around 9-11 degrees. Spring brings gradual warming, with April marking a significant increase to average highs of over 13 degrees, while summer is hot, with July and August often reaching sweltering highs above 30 degrees. Autumn temperatures are similar to those of spring, with September and October experiencing warm days before cooling off in November. The coldest months are January and December, while the warmest months are June, July, and August.