Icheon Weather in September
September in Icheon sees daytime temperatures around 27°C (81°F) and lows of 16°C (61°F) at night. With around 138 mm (5.4 in) of rainfall expected, it's worth packing a rain jacket.
Rainfall in Icheon in September
You can expect rain on around 8 days based on historical patterns, with 138 mm (5.4 in) average for the month. When showers do arrive, they tend to be on the heavier side. Worth being prepared even if rain days are not that numerous.
Temperature in Icheon in September
Daytime highs in Icheon in September reach 27°C (81°F), with nights around 16°C (61°F). This kind of day-to-night contrast is typical for this time of year. At 16°C (61°F) overnight, it can feel quite a bit cooler after dark. Worth packing something warmer for evenings, but the cooler temperatures are ideal for sleeping.
Sunshine in Icheon in September
The area enjoys a moderate level of sunlight, with around 176 hours. It's a good balance between sunny and cloudy days.Our weather planner can help you find worldwide destinations with pleasant weather during this period. October typically offers the best weather for Icheon.
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 Icheon's climate page.
Icheon Temperature in September
Min Temperature
16°C (61°F)
Max Temperature
27°C (81°F)
Chance of Rain
28%
Precipitation
138 mm (5.4 in)
Rainy days
8 days
Humidity
76% *
Sunshine
176 hours *
Percentage Sunshine
47% *
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Icheon typically drop from around 28°C (82°F) at the start of September to approximately 24°C (75°F) by the end. Nights are pleasant, with lows typically ranging from 13°C (55°F) to 20°C (68°F).
Average temperatures in September
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 September
Historical weather for Icheon in September
Browse day-by-day weather records for Icheon spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Icheon historical weather extremes in September
Based on weather observations in Icheon between 1976 and 2025, these are the recorded extremes during September.
- On September 10, 2024, temperatures climbed to 34°C (93°F), marking the warmest September day on record.
- The coldest September day was on September 25, 1997, with a maximum of 16°C (61°F).
- Nighttime temperatures dropped to 3°C (37°F) on September 27, 1987, marking the coldest September night on record.
Best Places in South Korea in September
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 September →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Icheon in September
Warm weather calls for comfortable, breathable clothing in September. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). High rain levels are expected, so pack waterproof gear and an umbrella or poncho. Sunglasses could come in handy during the sunnier parts of your trip.What To Do in Icheon in September
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 Icheon's climate page.
Temperature Rainfall Sunshine Humidity
See the full Icheon climate overview or explore weather in South Korea.
