Cologne has a temperate climate with warm summers and cold but not extreme winters. It's advisable to bring a jacket and an umbrella for rainy days and warm clothing for winter. Casual wear will be comfortable in the summer.

Don't miss the opportunity to try Sauerbraten (beef marinated in a sweet-sour sauce) or Halver Hahn (rye roll with cheese). And, of course, you have to taste Kölsch, the famous local beer in Cologne.

Schildergasse and Hohe Straße are two main shopping streets in Cologne, offering a variety of international brand stores. For antiques or unique items, explore the Belgisches Viertel area.

Cologne is known for its vibrant nightlife. You can enjoy live music at various clubs or bars, visit brewpubs to taste local beer and chat with locals, or attend one of the city's theaters for a more relaxed evening experience.

For a one-day visit to Cologne, you can start by visiting the iconic Cologne Cathedral (Kölner Dom) and then explore the beautiful Old Town of Cologne (Altstadt) with its charming streets and colorful houses.

Next, you can visit the Romano-Germanic Museum to see artifacts from the Roman era, take a walk along the Rhine River, and cross the famous Hohenzollern Bridge or Love Lock Bridge.

You can also soak in the modern atmosphere of Cologne by visiting the Belgian Quarter (Belgisches Viertel), known for its trendy shops and cafes. Finally, end your day by visiting the riverside bars in Cologne while enjoying a glass of Kölsch beer.