Mons Weather in December
With daytime temperatures of 8°C (46°F) and nighttime lows of 2°C (36°F), December in Mons brings low temperatures during the day. It is also the wettest month of the year, so pack an umbrella.
Rainfall in Mons in December
Since this is the rainiest month of the year, it's a good idea to carry an umbrella just in case. Rain is expected on roughly 19 days, totalling around 85 mm (3.3 in) for the month. Expect plenty of grey, overcast days rather than intense storms. The rain rarely amounts to much on any given day.
Temperature in Mons in December
If you're visiting Mons in December, expect highs of 8°C (46°F) and overnight lows around 2°C (36°F). During December, the winter season is in full swing. It stays cool throughout the day, so warm layers are a good idea from morning to evening. With lows around 2°C (36°F), nights are cold. The upside is that cool, crisp nights are often the best for a deep sleep.
Sunshine in Mons in December
This month sees fewer sunny days, with about 44 hours of sunshine, perfect for those who enjoy cooler temperatures.Our weather planner can help you find worldwide destinations with pleasant weather during this period. June, July, August and September typically offer the best weather for 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 December
Min Temperature
2°C (36°F)
Max Temperature
8°C (46°F)
Chance of Rain
63%
Precipitation
85 mm (3.3 in)
Rainy days
19 days
Humidity
89% *
Sunshine
44 hours *
Percentage Sunshine
*
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Mons typically stay consistent throughout December, with daily highs averaging around 8°C (46°F). Nights are cold, with lows typically ranging from 1°C (34°F) to 3°C (37°F).
Average temperatures in December
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 December
Historical weather for Mons in December
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 December
According to our 49 years of weather records for Mons, the following extremes were recorded between 1976 and 2025.
- Mons recorded its highest December temperature of 16°C (61°F) on December 16, 1989.
- The lowest daytime temperature in December was -5°C (23°F), recorded on December 19, 2009.
- The coldest night in December in Mons was on December 7, 2010, with a minimum of -15°C (5°F).
Best Places in Belgium in December
Find out more about the weather in Belgium and which places have the best travel conditions in this month. See all of Belgium in December →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Mons in December
Cold weather calls for smart layering in December. A thermal base layer makes a huge difference in staying warm. Add a wool sweater or fleece, then a wind-resistant outer jacket. Prepare for significant rainfall with proper waterproof clothing and shoes. With limited sunshine expected, sunglasses aren't a priority for packing.What To Do in Mons in December
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.
