In September 2025, Basel's outdoor pools had an average water temperature of 21.2 °C, with a likely data error showing a peak of 128 °C, while outdoor air temperatures averaged 15.7 °C, featuring moderate conditions with no heat days. The month experienced 6 warm days and 11 cool days for both water and air temperatures.
In September 2025, across Basel's outdoor pools, water temperatures ranged from 14 °C to 128 °C, with an average of 21.2 °C. The highest temperature was 128 °C at Hallenbad Eglisee on 2024-09-01, indicating a likely data error. The lowest was 12 °C at Eglisee Frauenbad on 2024-09-17. Pools included were Bachgraben Familienbad, Bachgraben Sportbad, Eglisee Familienbad, Eglisee Frauenbad, Hallenbad Eglisee, St. Jakob Familienbad, and St. Jakob Sportbad. There were 6 warm days (>25 °C) and 11 cool days (<20 °C) reported.
For outdoor air temperatures in September 2025, the average was 15.7 °C, with a maximum of 29.1 °C. There were 6 warm days (>25 °C) and 11 cool days (<20 °C), with no heat days (>30 °C). The month was characterized by moderate temperatures, with 13 days falling between 20 °C and 25 °C.
🤖 This text was generated with the assistance of AI. All quantitative statements are derived directly from the dataset listed under Data Source.