Mud festival in South Korea
In July, the peaceful seaside town of Boryeong turned into a chaos of mud for 9 days. We recommend putting this festival on your bucket list.
Siheung Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Siheung.
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Climate overview of Siheung
Temperatures in Siheung, Gyeonggi-do, South Korea, vary greatly throughout the year. August is the hottest month at 29°C (84°F), while January is the coldest at 3°C (37°F).
The city has a wet climate, receiving around 1227 mm (48 in) of rain/snowfall per year. Despite the high annual total, it has a distinct dry season from December to February, with warm summers and cold winters. July is the wettest month. The sunniest month is May, with 8.1 hours of sunshine per day on average.
Siheung Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Siheung - and find the best time to visit.
Monthly Temperature in Siheung
The climate in Siheung is known for significant temperature differences throughout the year, making the weather dynamic. On average, daytime temperatures range from a comfortable 29°C (84°F) in August to a chilly 3°C (37°F) in January.
Nighttime temperatures range from 23°C (73°F) in August to -5°C (23°F) in January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Siheung
Siheung has a notably wet climate with abundant precipitation, recording 1227 mm (48 in) of rain/snowfall per year. The seasons in Siheung bring significant changes in precipitation. The wettest month, July, receives heavy rainfall, with an average of 301 mm (12 in) of precipitation. This rainfall is distributed across 16 rainy days.
In contrast, the driest month, January, experiences much less snow/rainfall, totaling 23 mm (0.9 in) over 8 snowy/rainy days. These distinct seasonal differences provide diverse experiences throughout the year. For more details, please visit our Siheung Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Siheung
Siheung enjoys sunny spells year-round. May sees up to 8.1 hours of daily sunshine, perfect for a sunny trip. July, the least sunny month, still offers a generous 5.4 hours of sun despite this cloudier time of the year.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Data from: Incheon, South Korea (13 KM, 8 Miles).
Daily hours of sunshine
Data from: Incheon, South Korea (13 KM, 8 Miles).
Humidity in Siheung by Month
The relative humidity is high throughout the year in Siheung.
The city experiences its highest humidity in July, reaching 82%. In January, the humidity drops to its lowest level at 60%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Data from: Incheon, South Korea (13 KM, 8 Miles).
Best Time to Visit Siheung
Conditions in Siheung are generally most comfortable in May and October. They are typically least comfortable in January, February, March and July.
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
Jan
cold
Feb
cold
Mar
cold
Apr
good
May
excellent
Jun
very good
Jul
very wet
Aug
mixed
Sep
very good
Oct
excellent
Nov
mixed
Dec
mixed
- Best overall: May and October
- Warmest weather: July and August
- Most sunshine: May
- Wettest months: June, July, August and September, when rainfall is highest.
- Seasonal pattern: A distinct dry season from December to February, with warm summers and cold winters
- Coldest conditions: January, with freezing nights around -5°C (23°F).
Frequently asked questions about the climate in Siheung
What is the best time to visit Siheung?
May and October typically offer the most optimal weather in Siheung. In contrast, January, February, March and July tend to have less optimal conditions. Siheung has a distinct dry season from December to February, with warm summers and cold winters.
What temperatures can I expect in Siheung?
Daytime highs range from 3°C (37°F) in January to 29°C (84°F) in August. Nighttime lows range from -5°C (23°F) to 23°C (73°F). Temperatures vary considerably through the year.
How much rain does Siheung get?
Annual rainfall is around 1227 mm (48 in). July is the wettest month with 301 mm (12 in), while January is the driest with 23 mm (0.9 in).
How sunny is Siheung?
Siheung receives around 2,397 hours of sunshine per year. May is the sunniest month with 242 hours, while July is the cloudiest with just 161 hours. Overall, Siheung enjoys abundant sunshine.
Siheung 3-Day Forecast
Siheung on the map
Siheung is highlighted - select any city to see its climate.
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Mud festival in South Korea
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