Liège Weather in September
Liège in September sees pleasant temperatures, with highs around 20°C (68°F) and overnight lows of 11°C (52°F). Rainfall is fairly high at around 74 mm (2.9 in) on average, so pack waterproofs just in case.
Rainfall in Liège in September
The climate data from previous years indicates about 14 days of rain, averaging 74 mm (2.9 in) for the month. A fairly balanced picture this month, some wet days but nothing too extreme in terms of intensity.
Temperature in Liège in September
Liège has perfect weather in September, with days reaching 20°C (68°F) and nights cooling to 11°C (52°F). Temperatures can feel cooler in the morning and evening, so layering is often the best approach. With overnight lows of 11°C (52°F), evenings can feel noticeably cooler than the daytime. An extra layer is a good idea, though the cool air makes for a good night's sleep.
Sunshine in Liège in September
You can expect a moderate amount of sunlight, with approximately 159 hours. This means a pleasant mix of sun and overcast.If you're inclined towards comfortable temperatures and drier conditions, September is a good time to visit Liège.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Belgium, check out our Liège's climate page.
Liège Temperature in September
Min Temperature
11°C (52°F)
Max Temperature
20°C (68°F)
Chance of Rain
47%
Precipitation
74 mm (2.9 in)
Rainy days
14 days
Humidity
80% *
Sunshine
159 hours *
Percentage Sunshine
41% *
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Liège typically stay consistent throughout September, with daily highs averaging around 20°C (68°F). Nights are cool, with lows typically ranging from 10°C (50°F) to 12°C (54°F).
Average temperatures in September
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather for Liège in September
Browse day-by-day weather records for Liège spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Liège historical weather extremes in September
According to our 49 years of weather records for Liège, the following extremes were recorded between 1976 and 2025.
- On September 15, 2020, temperatures climbed to 33°C (91°F), marking the warmest September day on record.
- Liège experienced its chilliest September day on September 17, 1986, reaching only 9°C (48°F).
- Liège registered its coldest September night on September 19, 1977, with temperatures dropping to 2°C (36°F).
Best Places in Belgium in September
Find out more about the weather in Belgium and which places have the best travel conditions in this month. See all of Belgium in September →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Liège in September
Pleasant temperatures in September mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Rain gear is recommended, you can expect wet weather on multiple days. Bring sunglasses since you'll have some sunny periods throughout the monthWhat To Do in Liège in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Belgium, check out our Liège's climate page.
Temperature Rainfall Sunshine Humidity
See the full Liège climate overview or explore weather in Belgium.
