Last updated: August 21, 2025
April in Iwakuni, Japan showcases a vibrant transition into spring, with temperatures ranging from a mild 2°C (36°F) at night to a pleasant 24°C (76°F) during the day, yielding an average of 14°C (58°F). Visitors can expect a fair amount of rainfall, with 137 mm (5.4 in) of precipitation over 9 days, contributing to the lush landscapes characteristic of the season. The humidity level hovers around 75%, enhancing the refreshing atmosphere as cherry blossoms bloom, making it an ideal time for outdoor exploration and cultural experiences.
In April, Iwakuni, Japan, experiences a delightful springtime transition, with temperatures gradually warming as the month unfolds. The minimum temperature hovers around 2°C (36°F), while the average climbs to a pleasant 14°C (58°F), reaching a comfortable maximum of 24°C (76°F). This notable increase denotes a shift from the cooler early months of the year, highlighting the arrival of blossoming cherry blossoms and lush greenery. As April progresses, residents and visitors alike can expect increasingly milder conditions, making it an ideal time for outdoor activities and enjoying the vibrant natural beauty that characterizes this season.
In April, Iwakuni experiences a notable surge in rainfall, with precipitation totaling 137 mm (5.4 in) over approximately 9 days. This increase marks a significant uptick compared to earlier months, particularly March, which recorded 125 mm but over 10 days. As spring deepens, the gentle showers of April pave the way for the lush greenery that characterizes the region. This trend of rising precipitation continues into May, maintaining a similar rainfall amount but with fewer days of rain. As April bridges the transition into the wetter summer months, it becomes clear that the region is gearing up for an even more robust rainy season, with July looking to be the peak.
In April, Iwakuni, Japan experiences a notable transition in humidity levels, settling at 75%. This slight increase from March's 69% marks the beginning of a trend where humidity steadily rises as the region approaches the heat of summer. The increase continues into May, reaching a significant 84%, illustrating the area's shift towards a more humid climate. This pattern highlights a clear seasonal progression, with humidity peaking in the hotter months of July and August, maintaining a notably lush environment. As the year unfolds, residents and visitors alike can expect a palpable change in the air, with April serving as a pivotal month in this climatic transition.
In April, Iwakuni, Japan, experiences a dramatic spike in the UV Index, soaring to an extreme level of 11, which drastically reduces safe sun exposure time to just 10 minutes. This reflects an emerging trend as winter transitions to spring, highlighting an intensifying sun that demands increased caution. While January and February offered moderate UV levels of 4 and 5 respectively, March introduced a very high index of 8. It’s evident that as the month progresses, sun safety becomes increasingly vital, with potential risks skyrocketing. This pattern persists into May and June, where similar extreme levels are recorded. For those planning outdoor activities, it’s essential to stay informed about the ongoing UV trends for Iwakuni. Protect yourself by checking the Iwakuni UV Index regularly.
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As April arrives in Iwakuni, the days grow delightfully longer, bringing 282 hours of radiant sunshine. This month marks a noticeable upswing in daylight compared to January's humble 184 hours, setting the stage for the vibrant blooms of spring. Following the steady increase from 266 hours in March, April continues the trend of escalating sunshine, just shy of May's peak at 303 hours. Interestingly, this upward trajectory highlights Iwakuni’s transition into the sun-kissed months, as the city dances through June's 291 hours and into the heart of summer with August, which boasts a stunning 308 hours of golden light. The emergence of these longer, sunlit days invites both residents and visitors alike to revel in the beauty of the season.
As April approaches in Iwakuni, Japan, the likelihood of sunny weather presents an inviting charm, with a 47% chance of sunlight gracing the region. This slight increase compared to March's 40% reflects the gradual transition into spring, highlighting a period where nature awakens and outdoor activities beckon. Interestingly, while April still enjoys more sunny days than the humid summer months that follow—July and August both hovering around 23% to 25%—it stands out as a delightful window of mild weather before the rainy season sets in. The sun’s reemergence not only enhances the beauty of cherry blossoms but also elevates spirits, making April a truly captivating time in Iwakuni.
As spring blooms in Iwakuni, Japan, April heralds a notable increase in daylight duration. Transitioning from March's 11 hours to a welcoming 13 hours of daylight, April sets the stage for longer, sunnier days that invite outdoor activities and the vibrant beauty of nature. This upward trend continues into May, maintaining the 13-hour mark, while the days stretch even further in June and July, reaching a peak of 14 hours. As the season shifts towards summer, residents and visitors alike can cherish these longer days before the gradual tapering back in August and September. Overall, April marks a significant leap in daylight, embodying the essence of renewal and growth that characterizes the season.
In April, the winds in Iwakuni, Japan continue on a gentle note, mirroring the calmness of March with an average speed of 2.8 m/s (6 mph). This sustained breeze lingers through the anticipation of spring, providing a serene backdrop as cherry blossoms begin to bloom. As the weather warms, the winds tend to soften in the upcoming months, with May also reporting the same average speed. Notably, the sharp drop in wind speeds during June to 1.8 m/s (4 mph) signifies a transition towards the more tranquil summer months, suggesting that the breezy April is both a charming farewell to spring and a prelude to the stillness ahead.
Weather in Iwakuni varies notably across the year, with each month offering distinct climate conditions. This page compares April’s weather to other months in Iwakuni, focusing on differences in temperature, rainfall, humidity, and UV levels.
April and January present starkly contrasting weather conditions in Iwakuni. In January, temperatures range from a chilly -4°C (25°F) to a mild 15°C (59°F), with an average of just 5°C (42°F). The month experiences relatively low precipitation, totaling 49 mm (1.9 in) over 6 days, and humidity remains high at 76%. In contrast, April sees much warmer temperatures, with a minimum of 2°C (36°F) and a maximum reaching 24°C (76°F), resulting in a comfortable average of 14°C (58°F). This spring month receives significantly more rainfall, tallying 137 mm (5.4 in) across 9 days, while humidity remains similar at 75%. For more details on January's weather, you can visit Iwakuni weather in January.
April and February present quite different weather experiences. In April, temperatures range from a chilly 2°C (36°F) at night to a warm 24°C (76°F) during the day, with an average temperature of 14°C (58°F). The month also sees more precipitation, totaling 137 mm (5.4 in) across about 9 days, contributing to a higher humidity level of 75%. In contrast, February features a cooler temperature range from -4°C (26°F) to a maximum of 20°C (68°F), with an average of 6°C (43°F). It has significantly less precipitation at 69 mm (2.7 in) over 7 days and slightly lower humidity at 72%. For those interested in specifics about February weather, further details can be found here: Iwakuni weather in February.
April generally experiences milder and warmer conditions compared to March. The minimum temperature in April is slightly higher at 2°C (36°F), with an average of 14°C (58°F) and a maximum reaching 24°C (76°F). In contrast, March has a minimum of 1°C (33°F), an average temperature of 10°C (50°F), and a maximum of 22°C (71°F). Precipitation levels are similar, with April receiving 137 mm (5.4 in) over 9 days, compared to March's 125 mm (4.9 in) over 10 days. Additionally, April sees a higher humidity level at 75% compared to March's 69%. For a more in-depth look at March weather, visit Iwakuni weather in March.
April and May present a notable transition in weather patterns. April typically experiences cooler temperatures, with minimums around 2°C (36°F) and maximums reaching 24°C (76°F), along with an average temperature of 14°C (58°F). In contrast, May sees a rise in temperatures, boasting a minimum of 7°C (45°F) and maximums peaking at 28°C (83°F), with an average temperature of 19°C (66°F). Both months receive approximately the same level of precipitation, around 137 mm (5.4 in), spread across 9 days, but May tends to be slightly more humid at 84% compared to April's 75%. This shift contributes to a more comfortable and warmer climate as spring unfolds. For more details, you can check out the weather specifics here: Iwakuni weather in May.
April and June showcase distinct weather patterns, marking the transition from spring to early summer. In April, temperatures range from a chilly 2°C (36°F) at night to a comfortable average of 14°C (58°F), peaking at 24°C (76°F) during the day. The month sees significant precipitation, with 137 mm (5.4 in) falling over 9 days, and humidity levels at 75%. Conversely, June brings warmer conditions, with minimum temperatures rising to 14°C (57°F), averaging around 22°C (72°F), and reaching highs of 29°C (85°F). However, precipitation also increases, totaling 181 mm (7.1 in) over 14 days, while humidity climbs to 88%. This combination creates a noticeably warmer and more humid atmosphere in June compared to April. For more specific details on June weather, you can visit Iwakuni weather in June.
April and July showcase markedly different weather patterns. In April, temperatures range from a chilly 2°C (36°F) at night to a comfortable 24°C (76°F) during the day, with an average of 14°C (58°F). This month experiences moderate rainfall, totaling 137 mm (5.4 in) over about 9 days and a humidity level of 75%. In contrast, July presents much warmer conditions, with minimum temperatures of 18°C (65°F) and daytime highs soaring to 35°C (95°F), resulting in an average of 26°C (79°F). However, July is also characterized by significantly higher precipitation, accumulating 386 mm (15.2 in) over 19 days and experiencing increased humidity at 95%. For more details on July's weather, check out Iwakuni weather in July.
April and August exhibit striking differences in weather patterns. In April, temperatures range from a minimum of 2°C (36°F) to a pleasant average of 14°C (58°F), peaking at 24°C (76°F). This month experiences substantial rainfall, with precipitation totaling 137 mm (5.4 in) over about 9 days, and humidity levels around 75%. In contrast, August is much warmer, with temperatures starting at 20°C (67°F) and averaging 28°C (82°F), reaching highs of 35°C (96°F). It also sees increased rainfall, with 256 mm (10.1 in) falling over 14 days and a higher humidity level of 93%. For a closer look at what to expect in August, you can check Iwakuni weather in August.
When comparing the weather in April and September, a noticeable shift in temperature and precipitation is evident. April features a cooler temperature range, with minimums around 2°C (36°F) and averages of 14°C (58°F), peaking at 24°C (76°F). In contrast, September experiences much warmer conditions, with minimum temperatures starting at 15°C (60°F) and averages reaching 24°C (75°F), soaring to highs of 33°C (92°F). Additionally, September sees a significant increase in precipitation, totaling 237 mm (9.3 in) over 14 days, compared to April's 137 mm (5.4 in) over just 9 days. The humidity also rises in September to 84%, while April maintains a relative humidity of 75%. For more specific details about September weather, you can check Iwakuni weather in September.
April and October present contrasting weather conditions, with April experiencing cooler temperatures ranging from a minimum of 2°C (36°F) to a maximum of 24°C (76°F), while October boasts a milder range of 8°C (46°F) to 29°C (85°F). In terms of precipitation, October sees slightly more rainfall at 172 mm (6.8 in) over 10 days compared to April's 137 mm (5.4 in) over 9 days. Additionally, October's humidity is marginally higher at 79%, compared to April's 75%. For more details, you can check Iwakuni weather in October.
April and November present a transition between the cooler and warmer seasons, with each month showcasing its unique characteristics. In April, temperatures range from a minimum of 2°C (36°F) to a maximum of 24°C (76°F), with an average of 14°C (58°F). This month experiences more precipitation, accumulating 137 mm (5.4 in) over approximately 9 days, resulting in a humidity level of 75%. In contrast, November sees slightly cooler temperatures, with a minimum of 2°C (36°F) and a maximum of 23°C (74°F), averaging 13°C (55°F). However, it is much drier, with only 37 mm (1.5 in) of rain over 5 days and a humidity level that remains high at 76%. For more detailed information, you can check Iwakuni weather in November.
April and December present contrasting weather patterns. In April, temperatures range from a chilly 2°C (36°F) at night to a pleasant 24°C (76°F) during the day, with an average of 14°C (58°F). This month sees considerable rainfall, accumulating to 137 mm (5.4 in) over about 9 days, while humidity remains high at 75%. In contrast, December starts cooler, with nighttime lows around -1°C (31°F) and daytime highs reaching up to 20°C (69°F), averaging at 7°C (46°F). Precipitation is less frequent and lighter, totaling 61 mm (2.4 in) over 6 days, but the humidity also sits at 75%. For more details, you can check Iwakuni weather in December.
In April, Iwakuni experiences a delightful transition from the chill of winter to the warmth of spring, with average temperatures rising significantly compared to the colder months. The pleasant days invite outdoor activities, while the occasional rainfall adds a refreshing touch to the budding landscape. With humidity levels around 75%, the air feels vibrant and alive, although the precipitation, spread across nine days, is a reminder that spring weather can be unpredictable. This month sets the stage for the blossoming beauty of cherry blossoms, making it a unique and enchanting time to visit. To learn more about what to expect throughout the year, check out Iwakuni Climate.