WHEN TO GO
The best time to visit is in April to September.
France is perfect all through the year but during spring, especially during April to June, its perfect as the sun is pleasant and the warmth is very welcoming.
April - September is generally the most recommended period to visit Switzerland.
The ideal time to travel to Brussels and Amsterdam is during the spring/summer season, between the months of April and August and weather's very pleasant and you can spend longer time outdoors exploring the many beautiful sights. You can also visit the place during autumn which is between September-November.
The best time to visit London is in the spring season when the temperature is mild and the city's parks are green and blooming. However, late spring, and summer are prime tourist season bringing in eager visitors to enjoy the breathtaking experiences London and Scotland have to offer every type of tourist.