Last updated: October 30, 2025
In Ulsan, South Korea, October presents a tapestry of weather, with maximum temperatures reaching a warm 30°C (85°F), while the average settles at a comfortable 17°C (63°F). As the month progresses, temperatures can dip to a refreshing 5°C (41°F) at night. However, residents and visitors should be prepared for wet conditions, as the city experiences about 100 mm (3.9 in) of precipitation over an average of 7 days, accompanied by a humidity level of 77%. This blend of warmth and occasional rain contributes to the vibrant autumn atmosphere typical of Ulsan during this season.
As October arrives in Ulsan, South Korea, the city enjoys a delightful transition from the heat of summer to the crispness of autumn. With minimum temperatures averaging around 5°C (41°F) and maximums reaching a pleasant 30°C (85°F), it's a month that balances warmth and coolness perfectly. The average temperature sits at a comfortable 17°C (63°F), making it an ideal time for outdoor activities and enjoying the stunning fall foliage. Compared to the warmer months preceding it, October brings a refreshing change, with gentle breezes starting to replace the summer heat, creating a vibrant atmosphere that invites locals and visitors alike to embrace the beauty of the season.
October in Ulsan, South Korea, brings a refreshing change, with precipitation averaging 100 mm (3.9 in) over 7 days. As autumn settles in, this month typically sees a significant decrease in rainfall compared to the preceding summer months, which often exceed 200 mm. Notably, while October’s precipitation is less intense than during peak rainy seasons in July and September, it nonetheless contributes to a vibrant landscape as the foliage begins to transform. The consistent drizzle serves as a gentle reminder of the season's transition, making it a month of striking contrasts; the relative warmth of early autumn is accompanied by the crispness of damp air. This pattern hints that while October marks a dip in magnitude, the moisture it provides remains essential for sustaining the region’s lush scenery.
In October, Ulsan experiences a slight dip in humidity, averaging around 77%, as the summer's oppressive moisture begins to wane. This month marks a transition from the peak summer humidity levels, which soar to an impressive 95% in July and remain high at 93% in August. Following these humid months, the air becomes more comfortable, yet it still retains a noticeable dampness typical of fall. As autumn progresses, the humidity continues a gradual decline into November, which averages 75%, signaling the shift toward cooler and drier conditions. This trend illustrates how Ulsan's humidity ebbs and flows throughout the year, with October serving as a pivotal point bridging the sweltering summer and the crispness of winter.
As October rolls into Ulsan, South Korea, residents can expect a moderate to high UV Index of 7, requiring precautions as sun exposure can lead to skin damage in just 25 minutes. This marks a slight dip from the intense peaks observed during the summer months of June through August, where the Index reached extreme levels of 11 and 12, prompting urgent protective measures. However, the October sun remains powerful, requiring vigilance against UV rays, especially as the year transitions into the cooler months. As the UV Index begins to decline in November, returning to a moderate 5, October serves as a reminder of the lingering effects of late season sun. For more details on UV levels throughout the year, visit Ulsan UV Index.
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As autumn settles in, October in Ulsan, South Korea, basks in a delightful 259 hours of sunshine, a pleasant transition from the summer months. This figure reflects a remarkable trend of decreasing daylight as the year progresses, yet October shines brighter than both September and November. Following the peak sunshine of May at 307 hours, the sunlight gradually diminishes, with October still offering a substantial amount of daylight that invites both locals and visitors to enjoy the crisp air and vibrant fall colors. The lingering warmth of October sunshine serves as a perfect backdrop for outdoor activities, marking a charming farewell to the warmer months before winter approaches.
In Ulsan, South Korea, **October boasts a notable 52% chance of sunny weather, marking a welcome transition from the more overcast summer months. This month experiences a significant improvement compared to the dismal glare of June, which sees only a 27% likelihood of sunshine, hinting at a return to brighter days. Interestingly, as the year progresses, the chance of sun begins to climb, peaking in November (70%) and December (77%), suggesting that October serves as a gateway to the sunnier, crisper days of late fall and early winter. Whether you're planning outdoor activities or simply soaking up the sun, October’s moderate sunshine potential makes it an inviting time of year in Ulsan.
As October unfolds in Ulsan, South Korea, the daylight hours begin to wane, offering about 11 hours of light each day. This marks a subtle decline from the vibrant 12 hours seen in September, heralding the transition from summer's prolonged brightness into the cooler months. The gradual decrease in daylight is part of a clear seasonal trend, beginning with longer days in the spring when hours peak at 14 in both May and June. As the year progresses, daylight diminishes steadily, reaching its annual low of just 9 hours in December. This cyclical journey through the months allows residents to embrace the beauty of autumn, as shorter days invite cozy evenings and reflections on the changing season.
As October arrives in Ulsan, the coastal winds begin to soften, averaging a gentle 2.9 m/s (6 mph). This shift marks a departure from the breezier September, where the winds picked up to 3.6 m/s (8 mph), signaling the transition into cooler autumn months. The steady decline from the summer months — which saw peak wind speeds around 2.8 to 3.0 m/s (6 mph) — creates a serene atmosphere, perfect for enjoying the vibrant fall foliage. With the wind calming down, October invites residents and visitors alike to experience the beauty of the season in the lovely coastal city of Ulsan.
Weather in Ulsan varies notably across the year, with each month offering distinct climate conditions. This page compares October’s weather to other months in Ulsan, focusing on differences in temperature, rainfall, humidity, and UV levels.
In October, the weather is significantly warmer, with temperatures ranging from a minimum of 5°C to a maximum of 30°C, averaging around 17°C. This month also experiences higher humidity at 77% and more precipitation, with around 100 mm falling over 7 days. In contrast, January brings a stark change, marked by colder temperatures that can dip as low as -12°C, averaging just 3°C and peaking at 16°C. The precipitation in January is much lower at 32 mm, spread over only 3 days, and humidity levels decrease slightly to 72%. For more details on January's conditions in Ulsan, you can check out Ulsan weather in January.
In comparing the weather of October and February, October presents a much milder climate with daytime temperatures averaging around 17°C (63°F), peaking at a warm 30°C (85°F) while experiencing higher humidity at 77%. In contrast, February tends to be significantly colder, with an average temperature of just 4°C (40°F) and nighttime lows dropping to -9°C (15°F). Additionally, February sees less precipitation at 39 mm (1.5 in) over fewer rainy days (4), compared to October's 100 mm (3.9 in) spread across 7 days. For a detailed look at what to expect, check out Ulsan weather in February.
In comparing the weather of October and March, October tends to be warmer with average temperatures ranging from a minimum of 5°C (41°F) to a maximum of 30°C (85°F), while March experiences cooler temperatures, with a range from -2°C (29°F) to 22°C (73°F). October sees more humidity at 77% and greater average precipitation of 100 mm (3.9 in) over 7 days, compared to March's 65% humidity and 86 mm (3.4 in) of precipitation over 8 days. For more details on March weather specifics, you can check Ulsan weather in March.
When comparing the weather in October and April, there are some notable differences. October typically has a wider temperature range, with minimums around 5°C (41°F) and maximums reaching up to 30°C (85°F). In contrast, April's temperatures are generally cooler, ranging from a minimum of 2°C (35°F) to a maximum of 26°C (80°F).
Precipitation levels are fairly similar, with October receiving 100 mm (3.9 in) over about 7 days, while April has slightly less at 87 mm (3.4 in) across the same number of days. Humidity is also comparable, with October at 77% and April slightly lower at 75%. For more detailed information, you can visit Ulsan weather in April.
When comparing the weather in October and May, we can observe some notable differences. October typically experiences a range of temperatures from a minimum of 5°C (41°F) to a maximum of 30°C (85°F), with an average of 17°C (63°F). The month also brings about 100 mm (3.9 in) of precipitation over approximately 7 days, accompanied by a humidity level of 77%. In contrast, May tends to be slightly warmer, with minimum temperatures around 6°C (43°F), maximums reaching 33°C (92°F), and an average of 19°C (66°F). It sees a bit less rainfall, totaling 80 mm (3.1 in) over 8 days, and a slightly higher humidity of 83%. For more detailed information on May weather, you can visit Ulsan weather in May.
October and June exhibit distinct differences in weather patterns. In October, temperatures vary from a minimum of 5°C (41°F) to a maximum of 30°C (85°F), with an average of 17°C (63°F). The month sees around 100 mm (3.9 in) of rainfall over approximately 7 days, accompanied by a humidity level of 77%. In contrast, June experiences warmer temperatures, ranging from a minimum of 13°C (56°F) to a maximum of 32°C (90°F), with an average of 22°C (72°F). This month is wetter, with 144 mm (5.7 in) of precipitation over about 10 days and higher humidity at 87%. For more detailed insights into June weather, you can visit Ulsan weather in June.
October weather presents a notable contrast to July, with significantly cooler temperatures and lower humidity levels. While October sees temperatures ranging from a chilly 5°C (41°F) at night to a warm average of 17°C (63°F) during the day, July boasts considerably warmer conditions, with nighttime lows of 17°C (63°F) and daytime highs averaging 26°C (78°F). Additionally, July is characterized by its higher precipitation levels, with 244 mm (9.6 in) of rain falling over 14 days, compared to October's 100 mm (3.9 in) spread over just 7 days. The humidity is also much higher in July at 95%, making it feel hotter, while October's humidity of 77% provides a more comfortable atmosphere. For a detailed look at July's weather specifics, check out Ulsan weather in July.
October weather is significantly cooler than August, with average temperatures ranging from a minimum of 5°C (41°F) to a maximum of 30°C (85°F), compared to August's warmer range of 19°C (66°F) to 36°C (98°F). While October experiences lower humidity at 77%, August tends to be more oppressive with a humidity level of 93%. Precipitation is also notably different; October receives about 100 mm (3.9 in) of rain over 7 days, whereas August sees a higher total of 199 mm (7.8 in) across 15 rainy days. For a more detailed look at August conditions, you can visit Ulsan weather in August.
In comparing the weather between October and September, October tends to be cooler with minimum temperatures dropping to 5°C (41°F) and an average of 17°C (63°F), while September experiences milder temperatures with a minimum of 13°C (56°F) and an average of 22°C (73°F). Both months can reach similar maximum temperatures of around 30°C (85°F to 87°F), but October sees a significant reduction in precipitation, with only 100 mm (3.9 in) over 7 days compared to September's heavier rainfall of 236 mm (9.3 in) across 12 days. Additionally, humidity is slightly lower in October at 77% compared to September's 80%. For more details on September conditions, you can visit Ulsan weather in September.
In October, the weather is typically warmer with temperatures ranging from a minimum of 5°C (41°F) to a maximum of 30°C (85°F), contributing to an average temperature of 17°C (63°F). This month generally experiences about 100 mm (3.9 in) of precipitation over approximately 7 days, along with a humidity level of 77%. In contrast, November sees a notable drop in temperatures, with lows reaching -2°C (29°F) and highs peaking at 22°C (72°F), leading to an average of 11°C (52°F). Rainfall is considerably reduced to 21 mm (0.8 in) over just 3 days, and humidity decreases slightly to 75%. For more detailed weather information, you can check Ulsan weather in November.
The weather in October is significantly warmer compared to December, with temperatures ranging from a minimum of 5°C (41°F) to a maximum of 30°C (85°F) and an average of 17°C (63°F). In contrast, December experiences much colder conditions, featuring a range from -9°C (17°F) to a maximum of 18°C (64°F), with an average temperature of just 4°C (40°F). Additionally, October is wetter, receiving 100 mm (3.9 in) of precipitation over about 7 days, while December sees only 23 mm (0.9 in) across approximately 3 days. Humidity levels also shift slightly, with October at 77% compared to December's 73%. For further details, explore Ulsan weather in December.
As October unfolds in Ulsan, the weather beautifully transitions from the sweltering heat of summer to a more temperate climate. With average temperatures settling around a mild 17°C (63°F) and maximums reaching up to 30°C (85°F), it provides a pleasant respite from the extremes experienced in the previous months. However, rainfall becomes more frequent, with 7 days likely to bring about 100 mm (3.9 in) of precipitation, adding a refreshing touch to the scenery. The humidity also rises, averaging 77%, making for a crisp atmosphere that is perfect for autumn explorations. For a deeper understanding of seasonal patterns, be sure to check out Ulsan Climate.