Vienna and Graz are 200 km apart and both shaped by continental climate – but Graz in the inner-Alpine basin of Styria has hot summers averaging 27°C in July and receives around 850 mm of annual rain, more than Vienna's 600 mm. Both cities are considered sunny, but Vienna logs more sunshine hours per year overall.
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The comparison tool above stacks Vienna and Graz 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 Vienna and Graz 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 Vienna and Graz 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 Vienna and Graz are reachable in the block directly below.