In general, the hottest time of year in Europe is July and August, when average temperatures can reach above 30 degrees Celsius (86 degrees Fahrenheit) in many parts of the continent. The coldest time of year is January and February, when average temperatures can drop below freezing in many parts of Europe.
However, there are significant regional variations in climate within Europe. For example, the Mediterranean countries (such as Italy, Spain, and Greece) have a Mediterranean climate, which is characterized by hot, dry summers and mild, wet winters. The Nordic countries (such as Sweden, Norway, and Finland) have a continental climate, which is characterized by long, cold winters and short, cool summers.
So, while it is not hot all year round in Europe, there are many parts of the continent that experience hot summers.