Aywaille Weather in September
September in Aywaille sees daytime temperatures around 19°C (66°F) and lows of 10°C (50°F) at night. With around 81 mm (3.2 in) of rainfall expected, it's worth packing a rain jacket.
Rainfall in Aywaille in September
You can typically expect 16 days of rain this month, averaging around 81 mm (3.2 in). A fairly balanced picture this month, some wet days but nothing too extreme in terms of intensity.
Temperature in Aywaille in September
In September, expect pleasant temperatures in Aywaille, with highs of 19°C (66°F) and lows of 10°C (50°F) at night. A light jacket or extra layer can be useful, especially outside the warmest hours of the day. Nights cool down to 10°C (50°F), so a light jacket or extra layer is useful once the sun goes down. On the plus side, the cooler nights make for comfortable sleeping conditions.
Sunshine in Aywaille in September
You can expect a moderate amount of sunlight, with approximately 160 hours. This means a pleasant mix of sun and overcast.Our weather planner can help you find worldwide destinations with pleasant weather during this period. June, July and August typically offer the best weather for Aywaille.
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 Aywaille's climate page.
Aywaille Temperature in September
Min Temperature
10°C (50°F)
Max Temperature
19°C (66°F)
Chance of Rain
52%
Precipitation
81 mm (3.2 in)
Rainy days
16 days
Humidity
88% *
Sunshine
160 hours *
Percentage Sunshine
*
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Aywaille typically stay consistent throughout September, with daily highs averaging around 19°C (66°F). Nights are cool, with lows typically ranging from 9°C (48°F) to 11°C (52°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 Aywaille in September
Browse day-by-day weather records for Aywaille spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Aywaille historical weather extremes in September
Based on 49 years of weather observations in Aywaille between 1976 and 2025, these are the recorded extremes.
- On September 15, 2020, temperatures climbed to 32°C (90°F), marking the warmest September day on record.
- On September 25, 2025, Aywaille saw its coldest September day with temperatures maxing out at 8°C (46°F).
- Aywaille registered its coldest September night on September 28, 1987, 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 Aywaille in September
For Aywaille in September, you'll want flexible clothing. It's wise to pack cotton shirts, comfortable shorts, and a pair of jeans for cooler evenings. A light sweater or jacket is useful for air-conditioned spaces (like buses) or unexpected cool moments. High rain levels are expected, so pack waterproof gear and an umbrella or poncho. Sunglasses could come in handy during the sunnier parts of your trip.What To Do in Aywaille 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 Aywaille's climate page.
Temperature Rainfall Sunshine Humidity
See the full Aywaille climate overview or explore weather in Belgium.
