December weather forecastSumer, Bulgaria
December
Weather in December
The first month of the winter, December, is also a wintry month in Sumer, Bulgaria, with an average temperature varying between 5°C (41°F) and -0.9°C (30.4°F).Temperature
Onset of December comes with a temperature decline, the average high falling from a cool 11.2°C (52.2°F) in November to an icy 5°C (41°F). Sumer in December anticipates an average nighttime temperature of -0.9°C (30.4°F).Humidity
The average relative humidity in December is 77%.Rainfall
In Sumer, during December, the rain falls for 9.3 days and regularly aggregates up to 31mm (1.22") of precipitation. In Sumer, during the entire year, the rain falls for 146 days and collects up to 492mm (19.37") of precipitation.Snowfall
January through April, October through December are months with snowfall. In Sumer, during December, snow falls for 5.5 days and regularly aggregates up to 61mm (2.4") of snow. In Sumer, during the entire year, snow falls for 26.1 days and aggregates up to 507mm (19.96") of snow.Daylight
The month with the shortest days in Sumer is December, with an average of 9h and 0min of daylight.On the first day of December, sunrise is at 07:39 and sunset at 16:52. On the last day of the month, sunrise is at 07:58 and sunset at 17:00 EET.
Sunshine
The average sunshine in December in Sumer is 5.7h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Sumer. A UV Index value of 2, and less, symbolizes a low threat to health from unsafe exposure to UV radiation for ordinary individuals.Note: The maximum UV index, 2 during December, leads to the following recommendations:
Most individuals can handle sun exposure for up to an hour without burning, but children must always be shielded from sun exposure. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses. Be aware! The intensity of the Sun's UV radiation can be amplified nearly twice due to snow reflection.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Sumer, Bulgaria
- Average high temperature in December: 5°C
The warmest month (with the highest average high temperature) is August (29.1°C).
The month with the lowest average high temperature is January (2.6°C).
- Average low temperature in December: -0.9°C
The month with the highest average low temperature is August (16.3°C).
The coldest month (with the lowest average low temperature) is January (-3.4°C).
Average pressure in December
Sumer, Bulgaria
- Average pressure in December: 1021mbar
The month with the highest atmospheric pressure is December (1021mbar).
The months with the lowest atmospheric pressure are May, June and July (1013.9mbar).
Average wind speed in December
Sumer, Bulgaria
- Average wind speed in December: 8.9km/h
The windiest month (with the highest average wind speed) is March (10km/h).
The calmest month (with the lowest average wind speed) is November (7.4km/h).
Average humidity in December
Sumer, Bulgaria
- Average humidity in December: 77%
The month with the highest relative humidity is January (83%).
The month with the lowest relative humidity is August (54%).
Average rainfall in December
Sumer, Bulgaria
- Average rainfall in December: 31mm
The wettest month (with the highest rainfall) is June (64mm).
The driest months (with the least rainfall) are August and September (27mm).
Average rainfall days in December
Sumer, Bulgaria
- Average rainfall days in December: 9.3 days
The month with the highest number of rainy days is May (18.5 days).
The month with the least rainy days is September (8.8 days).
Average snowfall in December
Sumer, Bulgaria
- Average snowfall in December: 61mm
The month with the highest snowfall is January (141mm).
The months with the least snowfall are May, June, July, August and September (0mm).
Average snowfall days in December
Sumer, Bulgaria
- Average snowfall days in December: 5.5 days
The month with the highest number of snowfall days is January (8.7 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Sumer, Bulgaria
- Average daylight in December: 9h and 0min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in December: 5h and 42min
The month with the most sunshine is August (Average sunshine: 11h and 36min).
The months with the least sunshine are January and February (Average sunshine: 5h and 30min).
Average sunshine days in December
Sumer, Bulgaria
- Average sunshine days in December: 17.7 days
The months with the most sunshine days are August and September (19.4 days).
The month with the least sunshine days is June (9.4 days).
Average UV index in December
Sumer, Bulgaria
- Average UV index in December: 2
The months with the highest UV index are July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Sumer, Bulgaria
- Average cloud cover in December: 39
The month with the most cloud cover is February (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 17).
Average visibility in December
Sumer, Bulgaria
- Average visibility in December: 9km
The months with the highest visibility are June, July, August and September (10km).
The months with the lowest visibility are January and February (8km).
