Siheung Weather in January
Siheung in January sees low temperatures, with highs around 3°C (37°F) and overnight lows of -5°C (23°F). It's the driest month of the year, with very little snow/rainfall to worry about.
Rainfall in Siheung in January
Expect fewer clouds and less rain as the month goes on. This makes it an ideal time for outdoor activities, even though the temperatures are on the cooler side. Typically around 8 days of snow/rainfall are expected, averaging 23 mm (0.9 in) for the month. The rainfall pattern this month is fairly balanced. Showers tend to be moderate rather than extreme.
Temperature in Siheung in January
January in Siheung brings typical temperatures with highs around 3°C (37°F) and lows of -5°C (23°F). The month of January belongs to the winter season. Cold conditions tend to persist from morning through evening, so be prepared for winter weather. With lows of -5°C (23°F), nights are freezing. Packing a spare blanket is worth considering if you're staying somewhere that might not be fully heated. It's generally the coldest month of the year, making it essential to pack warm layers and winter accessories.
Sunshine in Siheung in January
The area enjoys a balanced 188 hours of sunlight, ensuring it's neither too overcast nor too sunny.January in Siheung has its charm. However, if you're seeking pleasant, dry and sunny weather, our weather planner can help you explore other destinations 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 South Korea, check out our Siheung's climate page.
Siheung Temperature in January
Min Temperature
-5°C (23°F)
Max Temperature
3°C (37°F)
Chance of Rain
25%
Precipitation
23 mm (0.9 in)
Rainy days
8 days
Humidity
60% *
Sunshine
188 hours *
Percentage Sunshine
*
Daily Historical Temperatures
51-year average (1976-2026)
Based on our historical records, temperatures in Siheung typically stay consistent throughout January, with daily highs averaging around 3°C (37°F). Nights are very cold, with lows typically ranging from -9°C (16°F) to -6°C (21°F).
Average temperatures in January
Daily Historical Precipitation
51-year average (1976-2026)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in January
Historical weather for Siheung in January
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 January
The extremes listed below come from historical weather data collected in Siheung from 1976 through 2025.
- The hottest January day on record in Siheung reached 15°C (59°F) (January 14, 2002).
- The coldest January day was on January 15, 2001, with a maximum of -12°C (10°F).
Best Places in South Korea in January
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 January →
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What to Wear in Siheung in January
Cold weather calls for smart layering in January. 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. Sunglasses could come in handy during the sunnier parts of your trip.What To Do in Siheung in January
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.
