Founded by the Romans in AD 50 as Colonia Claudia Ara Agrippinensium, Cologne sits on the Rhine and is now Germany's fourth-largest city. Its cathedral, begun in 1248 and only finished in 1880, was briefly the tallest building on Earth and remains a UNESCO World Heritage Site. Allied bombing destroyed roughly 61% of the built-up area in the Second World War, including nearly the entire old town, which was rebuilt from the 1950s onward. RTL, Germany's largest private broadcaster, runs its headquarters from the former trade-fair halls, and the city's carnival season draws costumed crowds into the streets every February.
Nights sit around 12°C and afternoons around 22°C, though some days reach 28°C.
Cologne has real seasons: summer afternoons sit around 26°C, winter ones around 8°C.
Some summer days reach 33°C, and some winter nights drop below freezing.
Rain is spread through the year — about 802 mm in total, from 87 mm in July down to 48 mm in April — so no single month is a washout.
Wind is rarely an issue; most months sit between calm and a light breeze. Air quality is worth watching: February averages an AQI of 59, while July clears to 39.
Days stretch to about 16.3 hours of light in June and shrink to 7.7 in December — something to weigh if you work to a fixed timezone.
No month in Cologne matches what you're after, so come for the place rather than the weather. Expect fast internet (164 Mbps) and a high cost of living (about €2050 a month).
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