Weather in Naples 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.
The climate trend for Naples stacks the same calendar window side by side, once per year, across up to ten years. Instead of pitting two single periods against each other, you see the whole sequence at a glance. Heat spikes and cold snaps become points in a line, not isolated anecdotes. That is what makes the difference between an outlier and a real pattern visible.
Change the window above: a single month shows the fine grain, a quarter smooths the noise, a full summer reveals trends in the hot half of the year. The point is always the same: values from Naples sit on top of each other so you can place them yourself, without a headline standing between you and the data.
Each year contributes four metrics to the trend: the daily maximum and minimum temperature averaged over the window, sunshine hours as the sum across the window, precipitation totals in millimetres, and the peak wind speed in metres per second. Together these four give a robust picture of each year in Naples without tipping into a temperature-only debate. Sunshine and precipitation tell the other half of the story.
Data comes from the ECMWF ERA5 reanalysis dataset via the Open-Meteo archive API. ERA5 reaches back to 1940 and extends daily with new observations, so the trend is not a frozen snapshot but reflects the current state every day. You can share the comparison for Naples at any time, all parameters live in the URL.
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.