Siheung Weather in December
Siheung in December averages 6°C (43°F) during the day and -2°C (28°F) at night. This is part of the winter season. Some snow/rainfall is to be expected.
Rainfall in Siheung in December
You can expect snow/rain on roughly 8 days based on historical data, averaging 29 mm (1.1 in) for the month. Rain this month is fairly typical, a standard mix of wet and dry days with no particularly heavy or persistent showers.
Temperature in Siheung in December
December in Siheung brings typical temperatures with highs around 6°C (43°F) and lows of -2°C (28°F). The winter season is characteristic of December. Even at the warmest part of the day, temperatures stay low. Dressing warmly from the start is the sensible approach. Nights are well below freezing at -2°C (28°F). An extra blanket is a good idea if you feel the cold, especially in older or less well-heated accommodation.
Sunshine in Siheung in December
The month brings about 178 hours of sunlight, offering a comfortable mix of sun and overcast.If your ideal day consists of dry skies and pleasant temperatures, May and October typically offer the best circumstances for Siheung.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit South Korea, check out our Siheung's climate page.
Siheung Temperature in December
Min Temperature
-2°C (28°F)
Max Temperature
6°C (43°F)
Chance of Rain
27%
Precipitation
29 mm (1.1 in)
Rainy days
8 days
Humidity
62% *
Sunshine
178 hours *
Percentage Sunshine
*
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Siheung typically drop from around 6°C (43°F) at the start of December to approximately 2°C (36°F) by the end. Nights are very cold, with lows typically ranging from -8°C (18°F) to -3°C (27°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 Siheung in December
Browse day-by-day weather records for Siheung spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Siheung historical weather extremes in December
According to our 49 years of weather records for Siheung, the following extremes were recorded between 1976 and 2025.
- The hottest December day on record in Siheung reached 17°C (63°F) (December 8, 2023).
- The lowest overnight temperature recorded in December was -19°C (-2°F) (December 30, 1980).
Best Places in South Korea in December
Find out more about the weather in South Korea and which places have the best travel conditions in this month. See all of South Korea in December →
perfect weather
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What to Wear in Siheung 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. Pack a light rain jacket or compact umbrella for occasional showers. Bring sunglasses since you'll have some sunny periods throughout the monthWhat To Do in Siheung 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 South Korea, check out our Siheung's climate page.
Temperature Rainfall Sunshine Humidity
See the full Siheung climate overview or explore weather in South Korea.
