May 2026 brought warmer and sunnier conditions to Belgium compared to the long-term average, though precipitation levels were notably elevated throughout the month. The period was characterized by significant temperature variations across different regions, with spring weather patterns delivering both mild days and occasional cold snaps.
Temperature Overview
Belgium experienced an average temperature of 15.0 degrees Celsius during May, which is 1.2 degrees above the normal value of 13.8 degrees. This warming trend was consistent across the country, though regional differences were pronounced. The coldest reading of the month occurred in Burg-Reuland on May 12, where temperatures dropped to just 0.4 degrees Celsius, indicating a late spring frost event in the eastern regions. In contrast, the warmest conditions were recorded in As on May 29, reaching 32.1 degrees Celsius, demonstrating the significant temperature range experienced during this spring month.
Precipitation Patterns
Rainfall was notably above normal, with an average total of 97.1 millimeters across Belgium compared to the normal 81.7 millimeters, representing a 19 percent increase. The wettest single day occurred on May 31 in Duffel, where 27.2 millimeters of rain fell. Over the entire month, Tienen recorded the highest total precipitation with 133.9 millimeters, indicating that central Belgium experienced particularly wet conditions during this period.
Sunshine and Notable Conditions
Despite the increased rainfall, sunshine hours were exceptionally abundant. Belgium recorded 410.5 hours of sunshine during May, significantly exceeding the normal 321.8 hours by 28 percent. This surplus of sunshine combined with above-average temperatures created favorable conditions for spring vegetation growth, though the elevated precipitation levels required careful management for agricultural activities.
Overall, May 2026 presented a warmer, wetter, and sunnier spring month for Belgium, with the combination of these factors creating a dynamic weather pattern typical of transitional spring seasons.