Last updated: August 21, 2025
In June, Iwakuni, Japan, experiences a warm climate that paints a vivid picture of early summer. Maximum temperatures can soar up to 29°C (85°F), while the average settles comfortably at 22°C (72°F), offering pleasant conditions for outdoor activities. However, as the humidity hovers around a high 88%, the air may feel quite muggy. This month also brings frequent rainfall, with 181 mm (7.1 in) accumulating over 14 days, ensuring the foliage remains lush and vibrant. Travelers and residents alike should prepare for the mix of warmth and moisture as June unfolds in this picturesque city.
As June unfolds in Iwakuni, Japan, the temperatures begin to rise, signifying the charm of late spring transitioning into summer. With a minimum temperature of 14°C (57°F) and a comfortable average of 22°C (72°F), residents enjoy pleasantly warm days. The maximum temperature reaches a delightful 29°C (85°F), offering ideal conditions for outdoor adventures and cultural explorations. Comparing June to the preceding months, it is clear that the warmth is notable; the transition from the cooler averages of May, hovering around 19°C (66°F), heralds a season filled with vibrant life. As humidity begins to increase towards July, June serves as a perfect precursor to the hotter months ahead, making it a prime time for visitors to experience the natural beauty of Iwakuni.
In June, Iwakuni experiences a notable increase in precipitation, with 181 mm (7.1 in) of rain falling over 14 days. This surge marks a significant shift from the drier months preceding it, such as May, which recorded 136 mm (5.4 in) over the same number of days. The onset of summer brings heavier rainfall, often leading into the even more intense precipitation of July, which averages a striking 386 mm (15.2 in) over nearly three weeks. June's rainfall not only enriches the lush landscape of Iwakuni, but also sets the stage for the wetter conditions of mid-summer, illustrating a clear trend of increasing rainfall as the seasons transition.
In June, Iwakuni experiences a notable peak in humidity, reaching 88%, which marks a significant increase from the milder spring months. As temperatures rise, the environment becomes more humid, continuing a trend that started in May, where humidity escalated to 84%. This upward trajectory leads into the sweltering summer months of July and August, where humidity soars to 95% and 93%, respectively. Overall, the transition from spring to summer in Iwakuni reveals a striking shift towards higher moisture levels, emphasizing the region's tropical characteristics during this time of year.
In June, Iwakuni, Japan, experiences an extreme UV Index of 11, indicating a consistent need for sun protection as the summer season sets in. This maintains the trend established in April and May, where the UV Index also reached levels of 11. With a brief burn time of just 10 minutes, locals and visitors alike are urged to be vigilant about sun exposure. This rising UV intensity is part of a broader pattern, as March marks a significant jump to 8, followed by April's peak, emphasizing the importance of adapting sun safety measures as summer approaches. As temperatures climb and the sun's rays become more potent, staying informed through resources like the Iwakuni UV Index can help ensure everyone enjoys the outdoors safely.
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June in Iwakuni, Japan, welcomes 291 hours of sunshine, marking a slight dip from the sun-drenched May, which boasted 303 hours. This month, while still bright and warm, showcases a trend where the length of sunny days begins to stabilize after the spring surge. As summer approaches, July typically sees a minor decrease to 281 hours, indicating that even the height of the season may experience variable sunshine. With August often peaking at 308 hours, it's clear that Iwakuni embraces its sunny disposition as the year progresses, making June a delightful prelude to the vibrant summer months ahead.
As we transition into June, Iwakuni's chances of sunny weather drop significantly to 25%, marking it as one of the least favorable months for sunshine. This decline continues a trend observed in the spring, where May already showed a low likelihood of 31% sunny days. Interestingly, while the earlier months of the year, like January and February, offered moderately higher probabilities of 43% and 50% respectively, the summer months don't provide much relief either, with both July and August still sitting at 23% and 25%. Overall, if you're planning outdoor activities in June, it might be wise to keep an eye on weather forecasts, as sunshine is likely to be elusive in Iwakuni during this transitional period.
As June arrives in Iwakuni, Japan, the days grow noticeably longer, boasting 14 hours of daylight that perfectly complements the vibrant summer atmosphere. This uptick in sunlight follows a steady increase from March, where daylight extends to 11 hours, gradually reaching 13 hours in April and May. The trend of increasing daylight is particularly striking from spring to early summer, enhancing outdoor activities and the region's natural beauty. As the summer months continue, July maintains this peak of 14 hours, before transitioning back into slightly shorter days in August and September. Overall, June signals a delightful embrace of prolonged daylight, inviting residents and visitors alike to revel in the warmth and joy of summer in Iwakuni.
In Iwakuni, Japan, June ushers in a marked change in wind patterns, with average wind speeds dropping to 1.8 m/s (4 mph), the lowest of the year. This gentle breeze signals a transition into summer, contrasting sharply with the brisker winds of earlier months, where averages hovered between 2.8 to 3.3 m/s (6 to 7 mph). As the spring months, particularly May, maintained a steadiness in wind speeds, June's calmness sets the stage for warmer days ahead, characterized by a shift towards the more humid air that summer brings. Following June, the winds slightly pick up again in July, but the month stands out as a tranquil prelude to the season's heat, offering a serene escape for locals and visitors alike.
Weather in Iwakuni varies notably across the year, with each month offering distinct climate conditions. This page compares June’s weather to other months in Iwakuni, focusing on differences in temperature, rainfall, humidity, and UV levels.
June and January present stark contrasts in weather. June sees temperatures ranging from a chilly 14°C (57°F) to a warm 29°C (85°F), averaging around 22°C (72°F), accompanied by significant rainfall of 181 mm (7.1 in) over approximately 14 days, resulting in high humidity levels of 88%. In contrast, January offers a much colder experience, with temperatures dipping as low as -4°C (25°F) and peaking at only 15°C (59°F), with an average of 5°C (42°F). Precipitation in January is considerably lower at 49 mm (1.9 in) spread over just 6 days, and the humidity is relatively less at 76%. For more detailed information on January weather, check out Iwakuni weather in January.
June and February present stark contrasts in weather. In June, temperatures are quite mild, with a minimum of 14°C (57°F) and an average of 22°C (72°F), peaking at a warm 29°C (85°F). However, this month also sees considerable rainfall, with 181 mm (7.1 in) over 14 days and high humidity levels at 88%. In contrast, February is much colder, featuring a minimum temperature of -4°C (26°F), an average of 6°C (43°F), and a maximum of 20°C (68°F). Precipitation is significantly lower at 69 mm (2.7 in), spread over just 7 days, and humidity is also lower at 72%. For more detailed insights on February in Iwakuni, you can check Iwakuni weather in February.
When comparing the weather in June and March, it's evident that June experiences significantly warmer temperatures, ranging from a minimum of 14°C (57°F) to a maximum of 29°C (85°F), with an average of 22°C (72°F). In contrast, March has a much cooler climate, featuring temperatures from a chilly 1°C (33°F) to a comfortable maximum of 22°C (71°F), averaging around 10°C (50°F). Additionally, June sees more precipitation, with 181 mm (7.1 in) over 14 days, while March has 125 mm (4.9 in) over just 10 days. Moreover, June has higher humidity at 88%, compared to March's 69%. For more detailed insights about March weather, you can check Iwakuni weather in March.
When comparing the weather in June to that in April, it's clear that June is warmer and more humid. June boasts an average temperature of 22°C (72°F), with daily highs reaching up to 29°C (85°F), while April's average temperature is significantly cooler at 14°C (58°F), peaking at 24°C (76°F). Additionally, June experiences more precipitation, with 181 mm (7.1 in) over 14 days, compared to April's 137 mm (5.4 in) over 9 days. The humidity also rises in June to 88%, compared to April’s 75%. For more details on April weather, you can check Iwakuni weather in April.
In comparing the weather of June and May, June typically features warmer temperatures, with a minimum of 14°C (57°F) and an average temperature of 22°C (72°F), compared to May's minimum of 7°C (45°F) and average of 19°C (66°F). Additionally, June can reach a maximum of 29°C (85°F), while May peaks at 28°C (83°F). Precipitation in June is higher, with 181 mm (7.1 in) falling over 14 days, compared to May's 136 mm (5.4 in) spread over just 9 days. Despite the increase in rainfall, June maintains a slightly higher humidity level at 88%, compared to May's 84%. For more detailed insights, you can visit Iwakuni weather in May.
June and July exhibit markedly different weather patterns. In June, temperatures range from a minimum of 14°C (57°F) to a maximum of 29°C (85°F), with an average of 22°C (72°F). The month sees a significant amount of rainfall, with 181 mm (7.1 in) over 14 days and a humidity level of 88%. In contrast, July brings warmer temperatures, with a minimum of 18°C (65°F) and a maximum reaching 35°C (95°F), averaging around 26°C (79°F). However, it also experiences heavier precipitation, totaling 386 mm (15.2 in) over 19 days, and higher humidity at 95%. For a detailed look at July weather, you can visit Iwakuni weather in July.
In June, temperatures typically range from a minimum of 14°C (57°F) to a maximum of 29°C (85°F), with an average of 22°C (72°F). The month experiences significant precipitation, totaling 181 mm (7.1 in) over 14 days, and features high humidity at 88%. Conversely, August sees warmer conditions, with temperatures ranging from a minimum of 20°C (67°F) to a maximum of 35°C (96°F), averaging around 28°C (82°F). Precipitation increases to 256 mm (10.1 in) over the same number of days, and humidity also rises slightly to 93%. For more detailed information, you can check Iwakuni weather in August.
June and September present distinct weather characteristics, with both months offering mild temperatures but differing in precipitation and overall moisture. In June, the temperatures range from a minimum of 14°C (57°F) to a maximum of 29°C (85°F), accompanied by 181 mm (7.1 in) of precipitation over 14 days and high humidity at 88%. In contrast, September sees slightly warmer temperatures, with a minimum of 15°C (60°F) and a maximum of 33°C (92°F), but it also experiences increased rainfall, totaling 237 mm (9.3 in) over the same number of days, while humidity is slightly lower at 84%. For more detailed information on September weather, you can check Iwakuni weather in September.
June and October showcase distinct weather patterns. June tends to be warmer, with average temperatures around 22°C (72°F) and maximums reaching up to 29°C (85°F), while October's averages drop to 19°C (66°F), with similar peak temperatures. Precipitation is relatively high in both months, with June receiving 181 mm (7.1 in) over 14 days and October slightly less at 172 mm (6.8 in) across 10 days. Additionally, June experiences higher humidity at 88%, compared to October's more comfortable 79%. For more details on October weather, check out Iwakuni weather in October.
June typically presents a warm and humid climate, with temperatures ranging from a minimum of 14°C (57°F) to a maximum of 29°C (85°F), resulting in an average temperature of 22°C (72°F). Rainfall is common, with 181 mm (7.1 in) of precipitation over approximately 14 days, contributing to a high humidity level of 88%. In contrast, November experiences cooler temperatures, with a minimum of 2°C (36°F) and a maximum of 23°C (74°F), leading to an average of 13°C (55°F). Rainfall in November is significantly lower, at 37 mm (1.5 in) over just 5 days, and humidity drops to 76%. For more detailed information on November weather, you can visit Iwakuni weather in November.
June and December present strikingly different weather patterns. In June, temperatures range from a minimum of 14°C (57°F) to a maximum of 29°C (85°F), with an average of 22°C (72°F). The month is characterized by high humidity at 88% and significant rainfall, totaling 181 mm (7.1 in) over about 14 days. In contrast, December experiences much cooler temperatures, with a minimum of -1°C (31°F) and a maximum of 20°C (69°F), averaging just 7°C (46°F). Precipitation decreases considerably to 61 mm (2.4 in) across only 6 days, and humidity lowers to 75%. For a more detailed look at the December climate, you can check out Iwakuni weather in December.
As June unfolds in Iwakuni, the weather transitions into a warm, humid embrace, distinct from the cooler months preceding it. With temperatures averaging around 22°C (72°F), the days are ripe for outdoor exploration, though visitors should be prepared for increased humidity levels at 88% and the likelihood of rain on about half the days of the month. The average precipitation of 181 mm (7.1 in) makes it the start of the wet season, contrasting sharply with the drier, cooler climate of spring. This blend of warmth and moisture creates a lush environment, showcasing the beauty of Iwakuni before the summer heat sets in. For a deeper understanding of the region's weather patterns, be sure to check out the complete guide at Iwakuni Climate.