Saints Constantine and Helena Weather in December
With daytime temperatures of 8°C (46°F) and nighttime lows of 3°C (37°F), December in Saints Constantine and Helena brings low temperatures during the day. Some rainfall is to be expected during the month.
Rainfall in Saints Constantine and Helena in December
Analyzing past climate data, one can expect approximately 7 days of rain, averaging 56 mm (2.2 in). When it rains this month, it tends to come down fairly heavily. Showers can be substantial even if they don't last all day.
Temperature in Saints Constantine and Helena in December
December in Saints Constantine and Helena brings low temperatures, with highs of 8°C (46°F) and nights around 3°C (37°F). During December, you'll experience the winter season. The days stay cool from start to finish. Layering up well will make outdoor time much more comfortable. With lows around 3°C (37°F), nights are cold. The upside is that cool, crisp nights are often the best for a deep sleep.
Sunshine in Saints Constantine and Helena in December
This month sees fewer sunny days, with about 72 hours of sunshine, perfect for those who enjoy cooler temperatures.
Wind Speed in Saints Constantine and Helena in December
Wind speeds average 3 m/s (6 knots) during December. At this speed, light breezes keep leaves and small twigs in gentle motion while the wind also provides natural cooling. Since this is an average, some days are more tranquil while others have more persistent light winds that are more noticeable.
Average water temperature in December
The water temperature is only 10°C (50°F) this month — cold enough that most people will want to stay out. Hardy swimmers may manage a quick dip, but it won't be comfortable.If you prefer dry days with pleasant temperatures, December may not be the ideal month to visit Saints Constantine and Helena. Our weather planner can help you explore destinations with more pleasant weather conditions.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Bulgaria, check out our Saints Constantine and Helena's climate page.
Saints Constantine and Helena Temperature in December
Min Temperature
3°C (37°F)
Max Temperature
8°C (46°F)
Water Temperature
10°C (50°F) *
Chance of Rain
25%
Precipitation
56 mm (2.2 in)
Rainy days
7 days
Humidity
79% *
Windspeed
3 m/s (6 knots) *
Sunshine
72 hours *
Percentage Sunshine
29% *
Daily Historical Temperatures
49-year average (1976-2025)
Based on our historical records, temperatures in Saints Constantine and Helena typically stay consistent throughout December, with daily highs averaging around 8°C (46°F). Nights are cold, with lows typically ranging from -1°C (30°F) to 3°C (37°F).
Average temperatures in December
Daily Historical Precipitation
49-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 Saints Constantine and Helena in December
Browse day-by-day weather records for Saints Constantine and Helena spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Saints Constantine and Helena historical weather extremes in December
According to our 28 years of weather records for Saints Constantine and Helena, the following extremes were recorded between 1997 and 2025.
- The warmest day in December was on December 3, 2004, with a maximum of 20°C (68°F).
Best Places in Bulgaria in December
Find out more about the weather in Bulgaria and which places have the best travel conditions in this month. See all of Bulgaria in December →
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What to Wear in Saints Constantine and Helena 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. Rain gear is recommended, you can expect wet weather on multiple days. With water temperatures around 10°C (50°F), the water is quite cold for swimming. You can skip the swimwear unless you're particularly tough. With limited sunshine expected, sunglasses aren't a priority for packing.What To Do in Saints Constantine and Helena 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 Bulgaria, check out our Saints Constantine and Helena's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed Water Temp
See the full Saints Constantine and Helena climate overview or explore weather in Bulgaria.
