May 2026 Rhine water temperature averages 16.3 degrees Celsius.
June 1, 2026In May 2026, the Rhine water temperature at the Weil am Rhein monitoring station ranged from 13.0 to 21.8 degrees Celsius, with an average of 16.3 degrees, which is typical for spring and not an extreme month.
Rhine water quality is continuously monitored at the Rheinüberwachungsstation Weil am Rhein (RÜS). This insight focuses on the temperature parameter in May 2026.
In May 2026, the Rhine water temperature at the monitoring station ranged from a minimum of 13.0 degrees Celsius to a maximum of 21.8 degrees. The average temperature for the month was 16.3 degrees. The month began with a temperature of 15.2 degrees on May 1 and ended with a temperature of 21.8 degrees on May 31. The coldest day of the month was May 17, with an average temperature of 13.0 degrees, while the warmest day was May 31, with an average temperature of 21.8 degrees.
Since records began, May water temperatures in the Rhine have varied considerably. The warmest May on record was in 2011, with an average temperature of 18.0 degrees, while the coolest was in 2019 and 2021, both with an average of 12.2 degrees, as shown in Figures 1 and 2. With an average temperature of 16.3 degrees, May 2026 falls within the range of typical spring conditions and does not represent an extreme month. Based on the temperature of 21.8 degrees on the last day of the month, swimming in the Rhine is now very pleasant. 🏊 Enjoy your swim, but please be cautious and review the safety information on Schwimmen im Rhein or install the BachApp for real-time updates.
Table 1: Summary of May 2026 Water Temperature in the Rhine River
| metric | date | value |
|---|---|---|
| Average temperature | May 2026 | 16.3 |
| Lowest temperature | 2026-05-17 | 13.0 |
| Highest temperature | 2026-05-31 | 21.8 |
| Temperature on first day of month | 2026-05-01 | 15.2 |
| Temperature on last day of month | 2026-05-31 | 21.8 |
Figure 1: May Rhine Water Temperatures [°C] since 2002
Figure 2: Rhine River average May Temperature [°C] since 2002
Figure 4: Heatmap of Rhine River Temperatures [°C]
Additional resources: Ryh Gfühl
🤖 This text was generated with the assistance of AI. All quantitative statements are derived directly from the dataset listed under Data Source.