Climate averages 1991–2020
Mons weather
in December.
A cold, moderately wet month: the 11th warmest and the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a cold month in Mons: daytime highs average 6.6°C and nights cool to about 2.2°C. By daytime temperature it is the 11th warmest of the 12 months.
Expect about 78 mm of rain on roughly 14 days, which makes December a moderately wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 8 h 06 min on an average December day.
The nearest other city in this atlas is La Louvière (17 km away). In December its highs average 6.1°C, about as warm as Mons, with 79 mm of rain.
Among the 18 cities listed in Belgium, Mons ranks joint 6th of 18 for the warmest December highs and 14th of 18 for the driest December (rainfall, lowest first). The mean December high of those 18 cities is 6.5°C; Mons is level with that mean.
From December to January, average highs fall by 0.5°C to 6.1°C, and monthly rainfall falls from 78 mm to 67 mm.
The annual picture
December in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Mons climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 6.1°C1.4°C | 1.4°C | 67 | 12.6 | 8.59 h |
| February | 7.2°C1.3°C | 1.3°C | 61 | 11.4 | 10.010 h |
| March | 10.6°C3.1°C | 3.1°C | 58 | 11.7 | 11.812 h |
| April | 14.2°C5.4°C | 5.4°C | 49 | 11.6 | 13.814 h |
| May | 17.6°C9.0°C | 9.0°C | 65 | 12.6 | 15.415 h |
| June | 20.5°C12.0°C | 12.0°C | 63 | 11.4 | 16.416 h |
| July | 22.5°C14.2°C | 14.2°C | 67 | 11.4 | 16.016 h |
| August | 22.4°C14.2°C | 14.2°C | 70 | 11.3 | 14.515 h |
| September | 19.1°C11.6°C | 11.6°C | 52 | 10.1 | 12.713 h |
| October | 14.8°C8.7°C | 8.7°C | 60 | 11.5 | 10.811 h |
| November | 9.8°C5.0°C | 5.0°C | 64 | 11.7 | 9.19 h |
| December, selected | 6.6°C2.2°C | 2.2°C | 78 | 13.5 | 8.18 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
December in nearby cities
- La Louvière in DecemberBelgium · 17 kmHigh 6.1°C · Low 1.7°C · 79 mm rain
- Charleroi in DecemberBelgium · 35 kmHigh 6.1°C · Low 1.8°C · 79 mm rain
- Anderlecht in DecemberBelgium · 50 kmHigh 6.7°C · Low 2.3°C · 74 mm rain
- Ixelles in DecemberBelgium · 51 kmHigh 6.3°C · Low 1.9°C · 74 mm rain
- Brussels in DecemberBelgium · 52 kmHigh 6.6°C · Low 2.2°C · 74 mm rain
- Aalst in DecemberBelgium · 54 kmHigh 6.7°C · Low 2.5°C · 71 mm rain
- Schaerbeek in DecemberBelgium · 55 kmHigh 6.6°C · Low 2.2°C · 74 mm rain
- Roubaix in DecemberFrance · 61 kmHigh 6.9°C · Low 2.4°C · 74 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Mons) is explained once on the Mons year overview and on the Sources, method and limits page.