August 2025 brought a near-normal temperature regime to Belgium, with an average of 18.8 degrees Celsius, just 0.1 degrees above the long-term normal. However, the month was marked by significant temperature extremes and a severe heatwave that dominated the middle weeks of the period.
Temperature Overview
The warmest day of the month occurred on August 12 in Boussu, where temperatures reached 34.4 degrees Celsius. In stark contrast, Maldegem recorded the month's coldest temperature of just 5.2 degrees on August 24, illustrating the considerable variability experienced across Belgian regions during this period.
Precipitation Patterns
August proved to be significantly drier than normal, with an average total precipitation of 32.0 millimeters compared to the seasonal normal of 68.9 millimeters. This represents a 54 percent deficit in rainfall. The wettest single day occurred on August 2 in Engis, which received 26.0 millimeters of precipitation. Over the entire month, Rouvroy emerged as the wettest location with a total of 78.9 millimeters.
Sunshine and Brightness
Belgium enjoyed above-average sunshine during August, accumulating 337.2 hours compared to the normal 324.5 hours, representing a 4 percent surplus. This enhanced sunshine contributed to the intensity of the heatwave conditions experienced mid-month.
Notable Weather Events
The most significant meteorological feature of August 2025 was an extended heatwave affecting multiple regions. A severe heatwave persisted from August 8 through August 19 with its peak intensity in Rouvroy, lasting 12 days. Additional severe heatwave conditions were recorded in Messancy during the August 8-16 period, while moderate heatwaves affected Florenville, Tintigny, and Habay from August 8 to August 16. These overlapping heat events underscored the intensity of the mid-summer conditions across Belgium during this period.