Cologne and Frankfurt are only 190 km apart, but Frankfurt's sheltered position in the Rhine-Main basin makes it noticeably sunnier and warmer than open-situated Cologne, recording over 1700 sunshine hours per year. Cologne compensates with especially mild winters – both cities rank among Germany's least frosty major cities.
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The comparison tool above stacks Cologne and Frankfurt into the same time window. Pick a month from last year, a quarter from 2020, or a full summer, and both cities are scored on the same four metrics: temperature, sunshine, precipitation, and wind. Aggregation switches between day, week, and month depending on how granular you want the trace.
A side-by-side comparison surfaces differences that a single-city view hides. If Cologne and Frankfurt sit in the same climate region, the gaps are small but both cities react similarly to weather patterns. If they sit further apart, coast versus inland or north versus south, regional effects show up directly in the numbers.
Both cities draw from the same dataset: the ECMWF ERA5 reanalysis archive, retrieved via the Open-Meteo archive API. Reanalysis means every available satellite and surface measurement is reconciled retrospectively and placed on a consistent grid. Values for Cologne and Frankfurt are therefore directly comparable whether you look at 1970 or 2025.
The comparison is free and ad-free. Every selection sits in the URL so you can share the result as a link or embed it into your own page via the widget. If you want to go deeper, the individual city pages for Cologne and Frankfurt are reachable in the block directly below.