The weather in Berlin follows a continental climate pattern, with cold winters, hot summers, and mild seasons in between.
Summer weather in Berlin is warm, with July and August being the hottest months of the year. Temperatures in these months can reach over 30 degrees C (90 degrees F), but are usually more moderate.
Winter weather in Berlin is cold, with frequent rain and snow. Autumn and spring are mild, with cool nights and pleasant days.
For most people, the best time of year to visit Berlin is from the late spring to the early autumn. The weather tends to be the best for sightseeing at this time of year, and there is the least chance of rain.
That said, Berlin is known for its sudden rain showers throughout the year, so bring an umbrella and appropriate wet weather clothing whenever you visit.