September weather forecast
Liège, Belgium

Come September, autumn begins its descent on Liège. Temperatures fall to a high of around 19°C (66.2°F), marking the start of cooler days and evenings. September experiences a slight drop in rainfall, just in time to enjoy the initial stages of the fall landscape. Shortened daylight hours and lower UV indexes cement September as a bridge from summer to fall. Preparing for the onset of autumn, September maintains remnants of summer warmth while heralding the arrival of fall foliage.

Temperature

September in Liège is marked by a subtle drop in average high-temperatures, transitioning from a pleasant 22°C (71.6°F) in August to an enjoyable 19°C (66.2°F). The nighttime temperature dips to a cool 11°C (51.8°F) on average during September.

Rainfall

In September, the rain falls for 14 days. Throughout September, 61mm (2.4") of precipitation is accumulated. Throughout the year, there are 196 rainfall days, and 630mm (24.8") of precipitation is accumulated.

Daylight

In Liège, the average length of the day in September is 12h and 37min.
On the first day of the month, sunrise is at 06:52 and sunset at 20:22. On the last day of September, sunrise is at 07:37 and sunset at 19:17 CEST.

Sunshine

In September, the average sunshine is 5h.

UV index

In September, the average daily maximum UV index in Liège, Belgium, is 4. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for ordinary individuals.
Note: A daily maximum UV index of 4 in September translates into the following instructions:
Act with care - The need to guard against sun damage is communicated. The solar radiation around mid-day is intense; avoid the Sun and stay safe. Employ a hat with a wide brim for robust protection, cutting UV exposure by half.