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 in August
August in Siheung sees daytime temperatures around 29°C (84°F) and lows of 23°C (73°F) at night. With around 243 mm (9.6 in) of rainfall expected, it's worth packing a rain jacket.
Rainfall in Siheung in August
Historically, August sees about 13 days of rain, with a monthly average of 243 mm (9.6 in). Rainfall intensity is on the higher side this month. Expect more substantial showers rather than light, passing rain.
Temperature in Siheung in August
If you're visiting Siheung in August, expect highs of 29°C (84°F) and overnight lows around 23°C (73°F). The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. Nights are warm at 23°C (73°F). It's worth making sure your accommodation has decent ventilation or air conditioning. It's the warmest month of the year on average, so summer clothing is the way to go.
Sunshine in Siheung in August
The city usually sees around 192 hours of sunlight, indicating many sunny days , a great month for sightseeing.Our weather planner can help you find worldwide destinations with pleasant weather during this period. May and October typically offer the best weather for Siheung.
Siheung Temperature in August
Min Temperature
23°C (73°F)
Max Temperature
29°C (84°F)
Chance of Rain
44%
Precipitation
243 mm (9.6 in)
Rainy days
13 days
Humidity
80% *
Sunshine
192 hours *
Percentage Sunshine
*
* Data from: Incheon, South Korea (13 KM, 8 Miles).
Siheung Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Siheung - and find the best time to visit.
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Siheung typically drop from around 31°C (88°F) at the start of August to approximately 28°C (82°F) by the end. Nights are warm, with lows typically ranging from 20°C (68°F) to 24°C (75°F).
Average temperatures in August
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 August
Historical weather records for Siheung in August
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 August
According to our 50 years of weather records for Siheung, the following extremes were recorded between 1976 and 2026.
- On August 1, 2018, temperatures climbed to 37°C (99°F), marking the warmest August day on record.
- The lowest daytime temperature in August was 19°C (66°F), recorded on August 25, 2005.
- Nighttime temperatures dropped to 14°C (57°F) on August 28, 1979, marking the coldest August night on record.
Best Places in South Korea in August
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 August →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Siheung in August
Warm temperatures in August make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. Heavy rain is guaranteed, please bring a good poncho and waterproof everything! And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.
What To Do in Siheung in August
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Swimming7/10 -
Cycling7/10 -
Walking7/10 -
Camping6/10 -
Outdoor sports7/10
Siheung 3-Day Forecast
More climate data for Siheung
Temperature Rainfall Sunshine Humidity
See the full Siheung climate overview or explore weather in South Korea.
Popular in August
Where to go in August - average daytime high across popular destinations.
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Mud festival in South Korea
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