Mons Weather in September
September in Mons averages 20°C (68°F) during the day and 11°C (52°F) at night. Quite a bit of rainfall is typical this month, with around 60 mm (2.4 in) on average. An umbrella is a good idea.
Rainfall in Mons in September
Typically, you can expect about 15 days of rain this month, with 60 mm (2.4 in) on average. Expect plenty of grey, overcast days rather than intense storms. The rain rarely amounts to much on any given day.
Temperature in Mons in September
The perfect temperature in Mons in September makes it a solid month to visit, with 20°C (68°F) during the day and 11°C (52°F) at night. Conditions are often most pleasant around the middle of the day. At 11°C (52°F) overnight, it can feel quite a bit cooler after dark. Worth packing something warmer for evenings, but the cooler temperatures are ideal for sleeping.
Sunshine in Mons in September
The month experiences a moderate amount of sunlight, with 143 hours of sunshine. This provides a nice balance between sunshine and clouds.If you're inclined towards comfortable temperatures and drier conditions, September is a good time to visit Mons.
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 Mons's climate page.
Mons Temperature in September
Min Temperature
11°C (52°F)
Max Temperature
20°C (68°F)
Chance of Rain
51%
Precipitation
60 mm (2.4 in)
Rainy days
15 days
Humidity
82% *
Sunshine
143 hours *
Percentage Sunshine
*
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Mons 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 Mons in September
Browse day-by-day weather records for Mons spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Mons historical weather extremes in September
Our historical data for Mons spans 1976 to 2025, revealing these weather extremes.
- On September 15, 2020, temperatures climbed to 34°C (93°F), marking the warmest September day on record.
- The lowest daytime temperature in September was 10°C (50°F), recorded on September 22, 1984.
- The coldest night in September in Mons was on September 23, 1979, with a minimum of 1°C (34°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 Mons in September
Comfortable temperatures call for an easy wardrobe in September. Pack summer basics like t-shirts and shorts, but include a light jacket for cooler moments. A pair of comfortable walking shoes is essential. Wet weather is likely, so pack waterproof gear for multiple rainy days. Bring sunglasses since you'll have some sunny periods throughout the monthWhat To Do in Mons 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 Mons's climate page.
Temperature Rainfall Sunshine Humidity
See the full Mons climate overview or explore weather in Belgium.
