Weather in Zurich year-over-year. Temperature, sunshine, precipitation and wind.
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The climate trend shows how the weather at a location has changed over multiple years. You choose a date range (e.g. the entire summer or a single month) and the number of years. The tool then loads the actual measured values from Open-Meteo (a free weather archive with data going back to 1940) for each year and displays them side by side. This lets you see at a glance whether a summer was warmer, drier, or windier than the average of the past few decades.
Data source: All data comes from Open-Meteo (open-meteo.com), licensed under CC BY 4.0. The values are based on the ERA5 reanalysis model from ECMWF and regional weather station data.
Open-Meteo's weather archive covers the period from 1940 onwards. For European cities the data is particularly dense and reliable, as it is based on ECMWF's ERA5 reanalysis dataset.
Each bar represents one year and shows the average value of the selected metric (e.g. daily maximum temperature in °C) over the chosen date range. The higher the bar, the warmer, sunnier, or rainier that particular year was.
Yes. The tool works for any city that Open-Meteo recognises in its geocoding API. Data density may be lower for cities outside Europe, but the base data from 1940 onwards is available globally.