Last updated: August 21, 2025
In October, Iwakuni, Japan, experiences a comfortable yet variable climate, with temperatures ranging from a maximum of 29°C (85°F) to a refreshing minimum of 8°C (46°F), averaging around 19°C (66°F). This month brings a significant rainfall total of 172 mm (6.8 in), spread across 10 days, contributing to a humid environment with an average humidity level of 79%. Visitors can expect a delightful mix of warm days and cooler evenings, perfect for exploring Iwakuni's rich cultural heritage amid the vibrant autumn foliage.
In October, Iwakuni, Japan transitions gracefully into autumn, showcasing a delightful blend of mild temperatures. With a minimum of 8°C (46°F) and an average around 19°C (66°F), this month offers a comfortable reprieve from the summer heat. As the mercury peaks at 29°C (85°F), visitors can relish in warm afternoons, perfect for exploring the city's rich history and stunning natural landscapes. This month marks a noticeable drop from September's warmth, but the overall climate remains inviting, making October an ideal time for outdoor activities amidst the vibrant fall foliage. Embrace the changing seasons in Iwakuni, where each day is a beautiful balance of crisp air and sunny skies.
October in Iwakuni, Japan, brings a noticeable shift in precipitation patterns as the monsoon season begins to wane. With an average rainfall of 172 mm (6.8 in) over approximately 10 days, October sees a decrease from the heavy downpours of summer, particularly following the record-breaking 386 mm (15.2 in) in July. This month balances between the remnants of summer humidity and the approach of drier autumn conditions, reflected in the lower rainfall amounts compared to the preceding months of September and August. As the landscape transitions, Iwakuni's October weather offers a refreshing respite from the deluge, setting the stage for the cooler, crisper days ahead.
October in Iwakuni, Japan, brings a refreshing change in humidity, settling at 79%, a noticeable drop from the sweltering heights of summer. Following the peak months of July and August, which see humidity levels soar to 95% and 93% respectively, October offers a slight reprieve as autumn begins to set in. This transitional month sees humidity levels decrease further from September's 84%, indicating a gradual shift towards the drier air of winter. The year's rhythm reveals a pattern where humidity reaches its zenith in the warmer months of May through September, before tapering off into the milder climate of the latter part of the year. As temperatures cool and the foliage begins to change, October reminds us of nature's cyclical dance between heat and freshness.
As autumn settles in Iwakuni, Japan, the UV Index in October reaches a moderate 7, indicating a high risk of harm from unprotected sun exposure, especially for those with fair skin. This is a notable decrease from the extreme levels seen during the peak summer months, making the burn time extend to 25 minutes before risk increases. Comparatively, September had a slightly higher index of 10, while earlier months exhibited even harsher conditions, with values climbing to 12 in July and August. This transition to more favorable UV conditions in October allows for a safer outdoor experience, yet caution is still necessary. For those looking to plan their sun-soaked activities, staying informed is key—check out the detailed information available at Iwakuni UV Index.
UV Risk Categories
As October dawns in Iwakuni, it brings with it an inviting 254 hours of sunshine, a gradual transition from the sun-drenched days of summer. While August stands out with the highest sunshine at 308 hours, October maintains a solid position, showcasing a slight dip yet remaining significantly brighter than the winter months ahead, such as November and December. This month reflects a thoughtful moderation in daylight, as the charming autumn scenery unfolds with vibrant foliage, hinting at the cozy days to come. As daylight dwindles, October offers a perfect blend of warm sunshine and cooler air, creating an enchanting atmosphere to explore the beauty of Iwakuni.
In Iwakuni, Japan, October stands out as a month of brighter prospects, boasting a 59% chance of sunny weather, the highest rate in the year. This notable increase follows the summer months, which are often marked by lower sunshine percentages ranging from 23% to 31%. As autumn descends, not only does the likelihood of sunny days rise, but it also brings a refreshing transition from the humid heat of summer to the milder temperatures of fall. This trend suggests that October is the ideal time for outdoor activities, allowing residents and visitors alike to soak in the beautiful autumn scenery under the sun.
As October unfolds in Iwakuni, Japan, daylight begins to wane with an average of 11 hours of sunlight—a slight decline from the 12 hours enjoyed in September. This month marks a transition toward shorter days, echoing the patterns observed in preceding autumn months. The gradual reduction in daylight, which starts in June with its peak of 14 hours, signals the approach of winter, as daylight hours steadily decrease to 9 hours by December. With the vibrant colors of fall foliage contrasting against diminishing light, October provides a unique charm, as residents and visitors alike embrace the beauty of the season while savoring the precious hours of sunlight before it recedes further into winter's embrace.
As October arrives in Iwakuni, Japan, the wind begins to whisper hints of the changing season, with an average speed of 2.3 m/s (5 mph). This mild breeze mirrors September's gentle gusts, suggesting a continuity in the comfortable air that characterizes early autumn. Notably, the winds are softer compared to the briskness that often marks winter months, where speeds increase again in November and December, reaching up to 3.3 m/s (7 mph). This transitional period reflects a serene calmness, allowing residents and visitors alike to enjoy the vibrant autumn foliage without the interruption of harsh winds, thus creating a picturesque backdrop for outdoor activities and reflection.
Weather in Iwakuni varies notably across the year, with each month offering distinct climate conditions. This page compares October’s weather to other months in Iwakuni, focusing on differences in temperature, rainfall, humidity, and UV levels.
October generally offers a warmer and more humid climate compared to January. With average temperatures ranging from a minimum of 8°C (46°F) to a maximum of 29°C (85°F), it's ideal for outdoor activities. However, it also sees considerable precipitation, averaging around 172 mm (6.8 in) over 10 days, contributing to a humidity level of 79%. In contrast, January brings much cooler temperatures, with an average minimum of -4°C (25°F) and a maximum of 15°C (59°F). This month experiences significantly less rainfall, averaging only 49 mm (1.9 in) over 6 days, and maintains a slightly lower humidity at 76%. For a deeper look into January weather, you can check out Iwakuni weather in January.
In October, temperatures range from a mild 8°C (46°F) at night to a warm 29°C (85°F) during the day, with an average of 19°C (66°F). The month also experiences significant rainfall, with 172 mm (6.8 in) of precipitation over about 10 days, contributing to a high humidity level of 79%. In contrast, February is much cooler, with temperatures dropping to a minimum of -4°C (26°F) and peaking at a more moderate 20°C (68°F), averaging around 6°C (43°F). This winter month sees markedly less precipitation, totaling 69 mm (2.7 in) over approximately 7 days, and a slightly lower humidity of 72%. For more specific details about February weather, check Iwakuni weather in February.
In October, temperatures range from a minimum of 8°C (46°F) to a maximum of 29°C (85°F), with an average of 19°C (66°F). This month also experiences higher precipitation, totaling 172 mm (6.8 in) over about 10 days, while humidity reaches 79%. In contrast, March sees cooler temperatures, with a minimum of 1°C (33°F) and a maximum of 22°C (71°F), averaging around 10°C (50°F). Precipitation in March is lower at 125 mm (4.9 in) over the same number of days, and humidity is slightly less, at 69%. For more specific details about the weather in March, you can check Iwakuni weather in March.
When comparing the weather in October and April, there are notable differences in temperature and precipitation. October features a broader temperature range, with minimums around 8°C (46°F), average highs at 19°C (66°F), and maximums reaching up to 29°C (85°F). In contrast, April starts cooler, with minimums around 2°C (36°F) and average highs averaging at 14°C (58°F), peaking at 24°C (76°F). Precipitation is slightly higher in October, totaling 172 mm (6.8 in) over about 10 days, compared to April's 137 mm (5.4 in) falling over 9 days. Interestingly, October presents higher humidity at 79%, while April maintains a slightly lower level at 75%. For more specifics about April's weather, you can check Iwakuni weather in April.
In comparing the weather of October and May, both months exhibit mild average temperatures, around 19°C (66°F). However, October tends to warm up slightly more, with maximum temperatures reaching 29°C (85°F) compared to May's 28°C (83°F). Notable differences arise in precipitation; October sees significantly more rainfall at 172 mm (6.8 in) over 10 days, while May receives less, amounting to 136 mm (5.4 in) over 9 days. Additionally, humidity levels are slightly higher in May at 84%, compared to October’s 79%. For a closer look at May's weather specifics, visit Iwakuni weather in May.
In comparing the weather of October and June, we see notable differences in temperature and precipitation. October typically experiences cooler temperatures, with a minimum of 8°C (46°F) and an average of 19°C (66°F), while June tends to be warmer, with a minimum of 14°C (57°F) and an average of 22°C (72°F). Both months have similar maximum temperatures, reaching up to 29°C (85°F). However, June has slightly more precipitation, totaling 181 mm (7.1 in) over about 14 days, compared to October's 172 mm (6.8 in) over 10 days. Humidity is also higher in June at 88%, versus October's 79%. For a detailed look at June weather specifically, you can check Iwakuni weather in June.
In comparing the weather between October and July, we see notable differences in temperature and precipitation. October features a milder climate, with average temperatures ranging from a minimum of 8°C (46°F) to a maximum of 29°C (85°F) and an average humidity of 79%. In contrast, July is significantly warmer, with temperatures ranging from a minimum of 18°C (65°F) to a maximum of 35°C (95°F) and much higher humidity at 95%. Additionally, July experiences greater rainfall, with 386 mm (15.2 in) over 19 days, compared to October’s 172 mm (6.8 in) over just 10 days. For more details on July weather conditions, you can visit Iwakuni weather in July.
In comparing the weather patterns of October and August, a distinct shift can be observed. October experiences cooler temperatures, with a minimum of 8°C (46°F) and an average of 19°C (66°F), reaching a maximum of 29°C (85°F). In contrast, August offers much warmer conditions, with a minimum of 20°C (67°F) and averaging 28°C (82°F), peaking at 35°C (96°F). Regarding precipitation, October sees 172 mm (6.8 in) over about 10 days, while August has more significant rainfall at 256 mm (10.1 in) across 14 days, accompanied by higher humidity levels of 93% compared to October's 79%. For a detailed look at weather specifics, you can check Iwakuni weather in August.
When comparing the weather in October to September, there is a noticeable shift in temperatures and precipitation patterns. October experiences cooler temperatures, with a minimum of 8°C (46°F) and an average of 19°C (66°F), compared to September's milder range of 15°C (60°F) minimum and an average of 24°C (75°F). Additionally, October sees a maximum temperature of 29°C (85°F), while September peaks at 33°C (92°F). Precipitation is also more prevalent in September, with 237 mm (9.3 in) of rain over 14 days, compared to October's 172 mm (6.8 in) over 10 days. Lastly, humidity levels are slightly lower in October at 79% compared to September's 84%. For more detailed information on September weather, visit Iwakuni weather in September.
October and November exhibit notable differences in weather patterns. In October, temperatures range from a mild minimum of 8°C (46°F) to a warm maximum of 29°C (85°F), with an average of 19°C (66°F). The month is also characterized by higher precipitation, totaling 172 mm (6.8 in) over 10 days and a humidity level of 79%. In contrast, November experiences cooler temperatures; the minimum drops to 2°C (36°F) and the average is only 13°C (55°F), while the maximum reaches 23°C (74°F). Additionally, November sees much less rainfall, with just 37 mm (1.5 in) across 5 days and humidity at 76%. For more detailed information, check out Iwakuni weather in November.
October and December showcase contrasting weather patterns. In October, temperatures range from a cool 8°C (46°F) at night to a warm 29°C (85°F) during the day, with an average of 19°C (66°F). This month experiences considerable rainfall, averaging 172 mm (6.8 in) over about 10 days, along with high humidity at 79%. In contrast, December brings much cooler conditions, with minimum temperatures dropping to -1°C (31°F) and a daytime max of 20°C (69°F), averaging around 7°C (46°F). Precipitation decreases significantly to 61 mm (2.4 in) across just 6 days, while humidity remains relatively stable at 75%. For more detailed information, check Iwakuni weather in December.
As October arrives in Iwakuni, the weather begins to transition, bringing a delightful mix of warmth and cooler temperatures. The average daily temperatures hover around a comfortable 19°C, with bright sunny days occasionally peaking at 29°C, making it a pleasant time for outdoor activities. However, the month is not without its quirks, as it also sees an increase in precipitation, totaling 172 mm over about 10 days, which adds a refreshing touch to the air while maintaining a humidity level of 79%. This shift from the sweltering summer months to more moderate conditions makes October a unique and inviting time to experience the charm of Iwakuni's landscape. For a deeper dive into Iwakuni's weather patterns, visit Iwakuni Climate.