Spa Weather in December
Spa in December sees low temperatures, with highs around 6°C (43°F) and overnight lows of 1°C (34°F). Rainfall is at its peak this month, around 115 mm (4.5 in) on average, so waterproofs are essential.
Rainfall in Spa in December
Expect frequent showers this month, so make sure to have an umbrella to keep yourself dry. Records from the past 30 years suggest around 19 days of rain, with 115 mm (4.5 in) average for the month. Wet weather is a regular and significant part of this month. Frequent days of rain combined with high totals means proper waterproofs are worth packing.
Temperature in Spa in December
Expect highs of 6°C (43°F) in Spa in December, with nights dropping to around 1°C (34°F). December is typically considered a winter month. Temperatures remain on the cold side all day. A proper warm jacket is worth having, not just for evenings. At 1°C (34°F) overnight, it gets properly cold after dark. On the bright side, cold nights tend to make for excellent sleeping conditions.
Sunshine in Spa in December
This month sees fewer sunny days, with about 45 hours of sunshine, perfect for those who enjoy cooler temperatures.
Wind Speed in Spa in December
Wind speeds average 5 m/s (10 knots) during December. At this speed, gentle to moderate breezes make small trees sway and the wind creates whitecaps on water bodies. Daily variations range from moderate winds to stronger breezes, creating excellent conditions for sailing, kite flying and wind sports.December in Spa has its charm, but if you're looking for destinations with pleasant temperatures and sunny skies, our weather planner can help you explore other options in the world.
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 Spa's climate page.
Spa Temperature in December
Min Temperature
1°C (34°F)
Max Temperature
6°C (43°F)
Chance of Rain
64%
Precipitation
115 mm (4.5 in)
Rainy days
19 days
Humidity
91% *
Windspeed
5 m/s (10 knots) *
Sunshine
45 hours *
Percentage Sunshine
*
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Spa typically stay consistent throughout December, with daily highs averaging around 6°C (43°F). Nights are cold, with lows around 0°C (32°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 Spa in December
Browse day-by-day weather records for Spa spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Spa historical weather extremes in December
Based on 49 years of weather observations (1976-2025), these are the most extreme conditions recorded in Spa.
- Spa recorded its highest December temperature of 15°C (59°F) on December 22, 1987.
- Spa experienced its chilliest December day on December 25, 2010, reaching only -7°C (19°F).
- Spa registered its coldest December night on December 19, 2009, with temperatures dropping to -17°C (1°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 Spa in December
Dress warmly and in layers for your trip to Spa in December. A good base layer system works wonders. Start with good thermal underwear, add something warm like a fleece sweater, then finish with a waterproof jacket on top. Expect heavy rainfall, so bring good rain protection and waterproof bags. You can probably leave your sunglasses at home, because sunny days are pretty rare this month.What To Do in Spa 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 Spa's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed
See the full Spa climate overview or explore weather in Belgium.
