Baku and the Absheron Peninsula experienced the highest rainfall of 2026 on May 17, according to Report.
A total of 103 mm of precipitation fell within nine hours, reaching 523% of the climatic norm for the region.
Earlier records this year also showed unusually high precipitation levels.
On March 27, 58 mm of rain fell over 15 hours (246% of the norm), while on March 28, 85 mm was recorded over 24 hours (360%).
In April, 29 mm fell over 21 hours on April 5 (128%), followed by 61 mm over 15 hours on April 6 (264%).
Meteorologists note that such figures indicate significant short-term deviations from typical seasonal patterns.