pen Data Insights

May rainfall 96% below normal, 22-day dry spell ongoing.

As of May 26, 2026, the region is experiencing a 22-day dry spell with month-to-date rainfall 96 percent below normal, following an April that was also …

Binningen heat event ties 30-day high, falls short of May record.

First Summerday in 2026 on 2026-05-26

Basel air quality alert: ozone and PM10 both spiked on May 26.

On 2026-05-26, Basel experienced elevated ozone and PM10 levels, with ozone exceeding the regulatory threshold of 120.0 µg/m³ and PM10 ranking 7th highest in the past …

Basel-Stadt births rise 9% since 2005, foreign share drops to 34.8%.

In 2025, Basel-Stadt recorded 1,835 births, with August having the most and November the fewest, and 34.8% of newborns were foreign. Compared to 2005, births increased …

Binningen hit 31.2°C on May 25, ranking among the year's warmest days.

First Summerday in 2026 on 2026-05-25

Basel PM10 peaks at 4th highest in 366 days.

On 2026-05-25, Basel experienced unusually high PM10 levels, with the maximum concentration ranking among the top 1% of all recorded days, while ozone exceeded regulatory thresholds …