Last updated: October 30, 2025
September in Icheon-si, South Korea offers a delightful mix of warm temperatures and refreshing humidity. The maximum temperature reaches a pleasant 30°C (86°F), while the average hovers around 21°C (70°F), providing an inviting atmosphere for outdoor activities. However, evenings can be cool, with minimum temperatures dipping to 7°C (45°F). Rainfall is prevalent this month, with a total precipitation of 144 mm (5.7 in) over about 9 days, contributing to the lush greenery of the region. The humidity level stands at a substantial 77%, enhancing the overall tropical feel of early autumn. Whether you're exploring local markets or enjoying nature, September in Icheon-si promises a vibrant experience.
In September, Icheon-si experiences a refreshing transition between summer and autumn, characterized by pleasant temperatures that showcase a distinct shift. The average temperature hovers around a comfortable 21°C (70°F), making it an ideal time for outdoor activities. Mornings start cool, with minimums dipping to 7°C (45°F), while the afternoons heat up to a pleasant 30°C (86°F). This month serves as a beautiful blend of the lingering warmth from August and the brisk breezes of fall, encouraging locals and visitors alike to enjoy the colorful foliage and vibrant atmosphere of the changing season.
In September, Icheon-si experiences a notable shift in its precipitation patterns, with an average of 144 mm (5.7 in) of rainfall spread over 9 days. This marks a significant decrease compared to the sweltering months of July and August, which see up to 267 mm (10.5 in) and 265 mm (10.4 in) respectively. The transition into autumn brings a refreshing reduction in both the amount and frequency of rain, providing a welcome change after the summer deluge. However, it’s still a month where the rain remains consistent enough to nourish the landscape, paving the way for the vibrant colors of fall. Overall, September serves as a bridge between the intense summer rains and the drier autumn months ahead, with Icheon-si transitioning gracefully into a new season.
In Icheon-si, South Korea, September marks a noticeable shift in humidity, averaging 77%. This slight decline follows the peak summer months of July and August, where humidity levels soar to a muggy 91%. As summer transitions to autumn, September's humidity still retains a certain lushness, yet it provides a welcomed respite compared to the extreme figures of the previous two months. The month’s humidity sits comfortably between the higher levels of late spring and the cooler, drier air that begins to emerge in October, which averages 79%. This gradual easing sets a tranquil stage for the season ahead, as Icheon-si prepares for the crisp autumn air that follows.
In September, Icheon-si experiences a notable decline in UV intensity compared to the peak summer months, yet the UV Index remains at a very high level of 9. This indicates that sun exposure should still be approached with caution, as the burn time is approximately 15 minutes for fair-skinned individuals. The transition into fall shows a significant drop from the extreme year-round highs of 11 reached in June, July, and August, but September reminds us that UV radiation can still pose risks. As autumn approaches, it's essential to stay mindful of sun protection to safely enjoy outdoor activities. For more detailed information, check out the Icheon-si UV Index.
UV Risk Categories
As the summer heat begins to wane, September in Icheon-si, South Korea, offers a delightful transition with 250 hours of sunshine, providing ample opportunity for outdoor activities and enjoying the vibrant autumn landscape. This hour count reflects a slight dip from the sun-soaked days of June, which boasts the year's highest total at 306 hours. However, September's sunshine still holds its own, remaining significantly bright compared to the chillier months ahead, particularly as it stands favorably against the earlier winter months like January and November, which struggle at 197 and 228 hours respectively. Overall, this month beautifully balances warmth and light, inviting both locals and visitors to relish the gentle shift towards fall.
In Icheon-si, South Korea, the likelihood of sunny weather in September is a modest 38%, which reflects a gradual decline in sunshine as summer retreats into fall. After experiencing drier and sunnier months in earlier summer, such as July and August with chances of sun dropping to 30% and 28% respectively, September marks a slight uptick, yet still remains on the lower end of the spectrum compared to spring months. As the year progresses, the chances begin to rise again in October to 45%, suggesting that while September may not be the sunniest month, it serves as a transitional period before brighter days return.
In Icheon-si, South Korea, the transition from summer to autumn is beautifully reflected in the daylight duration throughout September. After enjoying a peak of 14 hours of daylight in the summer months of June and July, the days start to shorten, with September providing a more balanced 12 hours of sunlight. This gradual decrease signals the onset of fall, where the days gradually tumble to 11 hours by October. The shift not only marks a change in daylight but also transitions the landscape into a palette of warm autumn hues, inviting residents to savor the beauty of the season amid cooling temperatures and shorter days.
In Icheon-si, South Korea, the September winds bring a gentle shift as the average wind speed reaches 2.2 m/s (5 mph). This marks a slight uptick from the languid breezes of summer, which dipped to 1.8 m/s (4 mph) in July and August, creating a serene atmosphere for late summer activities. As autumn approaches, the winds begin to pick up again, with September's gusts hinting at the seasonal transitions ahead. The trend continues into October with a slight decrease, emphasizing the cyclical nature of Icheon-si’s climate. Overall, September serves as a bridge, offering a refreshing blend of summer's calm and the invigorating breezes of fall.
Weather in Icheon-si varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Icheon-si, focusing on differences in temperature, rainfall, humidity, and UV levels.
In September, the weather is generally mild and warm, with temperatures ranging from a cool 7°C (45°F) at night to a comfortable average of 21°C (70°F) and rising to a peak of 30°C (86°F) during the day. The month also sees a fair amount of rain, with 144 mm (5.7 in) of precipitation over about 9 days, contributing to a high humidity level of 77%. In stark contrast, January presents a much harsher climate, with temperatures plunging to a minimum of -18°C (-1°F) and averaging around -2°C (28°F), reaching a maximum of only 13°C (55°F). This winter month experiences significantly less rainfall, totaling just 23 mm (0.9 in) over 3 days, and a slightly lower humidity of 71%. For more detailed information, you can check Icheon-si weather in January.
The weather in September presents a warm and humid environment with temperatures ranging from a minimum of 7°C (45°F) to a maximum of 30°C (86°F), averaging 21°C (70°F). During this month, the area experiences significant precipitation, totaling 144 mm (5.7 in) over about 9 days, contributing to a high humidity level of 77%. In contrast, February brings a stark chill, with temperatures dipping as low as -16°C (4°F), while the average sits at 0°C (32°F) and peaks at 19°C (67°F). This winter month sees much less precipitation, just 26 mm (1.0 in) across 4 days, and a lower humidity of 65%. For those interested in a detailed look at February's weather specifics, you can refer to Icheon-si weather in February.
September and March present strikingly different weather profiles. September typically experiences warmer conditions, with average temperatures reaching about 21°C (70°F) and maximums soaring to 30°C (86°F). In contrast, March is much cooler, with an average temperature of only 7°C (45°F) and a minimum dipping down to -6°C (21°F). Precipitation is also more prevalent in September, with 144 mm (5.7 in) of rain over approximately 9 days, compared to March's 57 mm (2.3 in) over 6 days. Additionally, the humidity is generally higher in September at 77%, while March enjoys a relatively drier atmosphere with 65% humidity. For more specific details about the weather in March, you can check Icheon-si weather in March.
When comparing September and April weather, several notable differences emerge. September boasts a much warmer average temperature of 21°C (70°F) with maximums reaching up to 30°C (86°F), compared to April's average of 12°C (55°F) and maximums of 28°C (82°F). Precipitation levels are also higher in September, with 144 mm (5.7 in) over 9 days, while April sees just 71 mm (2.8 in) of rain across 7 days. Humidity levels remain relatively similar, with September at 77% and April slightly lower at 75%. This makes September feel more tropical, while April still exhibits the chill of early spring. For further details on April weather in Icheon-si, you can refer to Icheon-si weather in April.
In comparing the weather between September and May, we notice several distinct differences. September typically experiences a wider temperature range, with minimums around 7°C (45°F) and maximums reaching 30°C (86°F), resulting in a comfortable average of 21°C (70°F). In contrast, May's temperatures are generally a bit cooler, with minimums of 4°C (39°F) and maximums peaking at 33°C (92°F), leading to an average of 18°C (64°F). While both months receive precipitation on 9 days, September sees slightly heavier rainfall at 144 mm (5.7 in) compared to May's 109 mm (4.3 in). Humidity is also prevalent in both months, with September at 77% and May slightly higher at 81%. For more detailed information, you can check Icheon-si weather in May.
September and June exhibit some notable differences in weather patterns. In September, temperatures range from a cooler minimum of 7°C (45°F) to a pleasant average of 21°C (70°F), reaching a maximum of 30°C (86°F). The month experiences higher precipitation, with around 144 mm (5.7 in) falling over 9 days, accompanied by a humidity level of 77%. In contrast, June showcases milder temperatures, with a minimum of 12°C (54°F), an average of 22°C (72°F), and a maximum reaching 34°C (94°F). Precipitation is lighter in June, totaling 85 mm (3.3 in) over 8 days, and the humidity is slightly higher at 85%. Overall, June tends to be warmer and more humid, while September is cooler and wetter. For more details on June weather in Icheon-si, you can visit Icheon-si weather in June.
When comparing the weather in September and July, it’s clear that September tends to be cooler and less humid. September features a temperature range with a minimum of 7°C (45°F) and a maximum of 30°C (86°F), averaging at 21°C (70°F), while July is significantly warmer, with temperatures ranging from a minimum of 17°C (62°F) to a maximum of 35°C (96°F) and an average of 26°C (78°F). In terms of precipitation, July is wetter, receiving 265 mm (10.4 in) of rain over 16 days, compared to September's 144 mm (5.7 in) across 9 days. Additionally, July has a higher humidity level at 91%, while September's humidity averages at 77%. For more details, you can check Icheon-si weather in July.
Comparing the weather between August and September reveals notable differences in temperature and precipitation. August experiences a higher minimum temperature of 15°C (60°F) and an average of 26°C (79°F), with maximum temperatures reaching up to 38°C (101°F), making it significantly warmer than September, which has a minimum of 7°C (45°F) and an average of 21°C (70°F) with a maximum of 30°C (86°F). Additionally, August sees more precipitation at 267 mm (10.5 in) over 17 days, compared to September's 144 mm (5.7 in) across only 9 days. The humidity is also higher in August at 91% compared to September's 77%. For more detailed information on August weather in Icheon-si, you can visit Icheon-si weather in August.
September experiences warmer temperatures, with a minimum of 7°C and an average high of 30°C, while October sees a notable drop, with minimums dipping to -1°C and an average high of 29°C. Precipitation levels also decrease significantly from 144 mm in September to 62 mm in October, with fewer rainy days. Humidity remains relatively high in both months, slightly increasing from 77% in September to 79% in October. For more detailed insights, you can explore Icheon-si weather in October.
In September, the weather is significantly warmer, with temperatures ranging from a minimum of 7°C (45°F) to a maximum of 30°C (86°F), and an average of 21°C (70°F). In contrast, November sees a marked drop in temperature, with a minimum of -6°C (21°F) and an average of just 7°C (45°F). While September experiences more rainfall with 144 mm (5.7 in) over 9 days, November's precipitation is much lower at 53 mm (2.1 in) over just 5 days. Additionally, humidity levels in November rise slightly to 80%, compared to 77% in September. For further details on weather specifics, you can check Icheon-si weather in November.
September and December present stark contrasts in weather patterns. In September, temperatures range from a mild 7°C (45°F) to a warm 30°C (86°F), with an average of 21°C (70°F). The month experiences significant rainfall, totaling 144 mm (5.7 in) over about 9 days, combined with a higher humidity of 77%. In contrast, December brings a much colder climate, with temperatures dropping between -15°C (5°F) and a maximum of 13°C (55°F), averaging around 0°C (31°F). Precipitation significantly decreases to 25 mm (1.0 in) over just 5 days, and humidity levels drop slightly to 74%. For a closer look at December weather, you can visit Icheon-si weather in December.
As September unfolds in Icheon-si, it brings a noticeable shift in weather patterns compared to the summer months. With temperatures cooling down significantly from the highs of August, the average climate becomes more temperate, making it a perfect time for outdoor activities. However, this month also sees an increase in rainfall, with about nine days experiencing precipitation, contributing to the relatively high humidity levels. The combination of warm days and refreshing evenings creates a unique transitional atmosphere, paving the way for the crispness of autumn ahead. For a deeper dive into Icheon-si's weather nuances, visit Icheon-si Climate.