Basel in March: March marks the spring awakening: rising temperatures, more sunshine hours, and a noticeable revival of nature alternate with late winter spells. Basel at the tri-border junction of Switzerland, Germany and France lies in the Upper Rhine Plain and benefits from around 1800 sunshine hours per year and mild winters. Climate change is leaving visible traces here too: deviations from the long-term mean reveal how weather extremes in Basel have shifted over the past decades.
March in Basel typically shows rising temperatures and changeable spring weather. Deviations from the 10-year average reveal how the local climate is changing.
Planning around March in Basel? This page shows the average weather in Basel during March 2026, compared against the 10-year climatological mean. The comparison covers daily maximum and minimum temperature, sunshine hours, precipitation, and peak wind speed. Those five variables most reliably describe whether a month felt warmer, sunnier, wetter or windier than usual.
Historical weather data for Basel comes from the ERA5 reanalysis product, a high-resolution dataset maintained by the European Centre for Medium-Range Weather Forecasts (ECMWF) and delivered through Open-Meteo. ERA5 is one of the most accurate publicly available sources for historical Basel climate values, updated daily and covering every month from 1940 to today. That means typical Basel March conditions are grounded in measured values, not a statistical model.
The KPI cards on this page each show two numbers: the current March 2026 value for Basel, and its deviation from the 10-year reference mean. A positive deviation means the month ran warmer, sunnier, wetter or windier than the recent climate normal for Basel in March. Weather in Basel Marchhas shifted measurably over recent decades; to explore Basel March climate year by year, open the climate trend page. To compare Basel weather against another city for the same month, use the weather comparison tool.
This page is a retrospective, not a forecast. If you are planning travel, a garden project, a photo shoot, or an event in Basel in March, use the measured historical values as a realistic baseline and treat them as a distribution, not a guarantee. The 10-year mean smooths over individual extreme years; the current-year values show where this particular March sat against that baseline. For typical Basel March conditions across a longer window, the climate trend page covers every year back to 1940. For day-level detail rather than monthly aggregates, compare arbitrary date ranges for Basel using the period comparison tool on the homepage.
This page compares the daily measured values of the current year against the average of the last ten years, the so-called 10-year mean. The deviation values in the KPI cards show directly whether the current month is warmer, sunnier, wetter, or windier than usual. The reference data comes from Open-Meteo's ERA5 weather archive and includes daily measured maximum and minimum temperatures, sunshine hours, precipitation totals, and wind speeds.
A ten-year average is short enough to reflect current climate trends, yet long enough to statistically balance out individual extreme years. The World Meteorological Organization (WMO) recommends 30-year normals as the official climate reference, our 10-year mean is deliberately more present-focused and therefore shows the climate change of the most recent decade more clearly.
The daily data for the current year comes directly from Open-Meteo in real time. The reference mean is calculated from actual measured values of the last 10 years, no statistical model, but real historical archive data. The basis is ECMWF's ERA5 reanalysis dataset.
The deviation shows the difference between the current monthly average and the 10-year reference value for the same month. A value of +2.3 °C means: the current month is on average 2.3 degrees warmer than the average of the last 10 years.
Weather review pages are available for over 100 cities in Germany, Austria, and Switzerland. Choose your city from the overview page or use the weather comparison tool on the homepage for custom periods.