The city has 2 major seasons with varying Spring and Autumn. Summers are rather hot and wet while the winters occasionally have snowfall. Rotterdam has a temperate oceanic climate and the weather is milder than its neighboring cities.
Summer: June to September is high season with an average of 20 degrees Celsius or more. The highest recorded temperature in Rotterdam can touch around 34 degrees Celsius. July and August also have a high amount of rainfall. Most of the festivals in the city take place during this season.
Autumn: October- November is the autumn season with a temperature of around 10-12 degrees Celsius.
Winter: December to February is the winter season with January being the coldest month. Temperatures do fall occasionally well below zero with relative snowfall. However, for most parts of the winter season, the temperature varies from 3-5 degrees Celsius.
Spring: March to May is spring season with a mild rise in temperature and an average of around 13 to 15 degrees Celsius. Springs are known for blooming flowers and is the perfect season to visit the city if you love nature.
The best time to visit Rotterdam is during the Spring and Summer season when the temperature is pleasant.