Last updated: August 21, 2025
In April, Muroran, Japan experiences a beautiful transition into spring, characterized by a maximum temperature of 15°C (59°F) and an average of 6°C (42°F), making it a pleasant time to enjoy the outdoors. With minimum temperatures dipping to 0°C (32°F), early mornings may still feel crisp. The region sees 86 mm (3.4 in) of precipitation over approximately 11 days, contributing to the lush scenery as humidity levels hover around a significant 81%. This blend of moderate temperatures and occasional rain creates an invigorating atmosphere for both residents and visitors alike, inviting exploration of the natural beauty that Muroran has to offer.
As April arrives in Muroran, Japan, the city begins to shake off the chill of winter, welcoming the promise of spring with noticeably milder temperatures. The month starts with a minimum temperature hovering around 0°C (32°F), providing a gentle shift from the biting cold of preceding months. With an average of 6°C (42°F), days gradually warm up, reaching highs of 15°C (59°F) by the month's end. This gradual warming trend marks a significant departure from the harsh lows of winter, making April a delightful time for locals to embrace outdoor activities, witness the blooming flora, and enjoy the refreshing atmosphere that heralds the arrival of the vibrant Japanese spring.
In April, Muroran experiences a notable increase in precipitation, with 86 mm (3.4 in) of rain falling over 11 days. This marks a continuation of the upward trend observed from previous months, with March recording 81 mm (3.2 in). As spring unfolds, the rain not only rejuvenates the landscape but also signals a seasonal shift towards wetter weather, paving the way for the more substantial rain of May and June. The pattern of increasing precipitation is indicative of Muroran's transitional climate, where the milder April showers prepare the lush backdrop for the vibrant summer months ahead.
Experience the April humidity in Muroran, Japan, where levels remain steady at 81%, maintaining the trend established in March. As spring unfolds, residents enjoy a comfortable atmosphere, a brief respite before the summer months bring notable increases. Following April, humidity levels surge, peaking in July and August at a relentless 93% and 95%, respectively. This seasonal transition highlights not only the mildness of early spring but also the impending tropical moisture that characterizes Muroran’s sultry summer. With 81% humidity in April, it's a perfect time to relish the refreshing coastal breezes before the air thickens with heat and humidity in the following months.
April marks a significant shift in Muroran’s UV Index, rising to 7, categorized as high. This increase reflects the transition to sunnier days, reducing typical burn time to just 25 minutes. As spring unfolds, sun safety becomes increasingly important, especially compared to the earlier months where the UV Index hovered between 2 and 5. Looking ahead, May will see an even sharper rise, with a very high UV Index of 9, emphasizing the need to stay vigilant about sun protection. For more insights and a detailed breakdown, check out the Muroran UV Index.
UV Risk Categories
As spring unfurls its charm in Muroran, Japan, April shines brightly with a delightful 285 hours of sunshine, marking a significant increase from the previous months. Following the gradual ascent from January's mere 142 hours, the city experiences a luminous leap through March's 253 hours, setting the stage for the vibrant energy of April. This month not only outshines its predecessors but also paves the way for May, which promises 300 hours of glorious sunlight. The steady rise in daylight hours heralds the onset of summer, creating a perfect backdrop for outdoor activities and exploration in this picturesque coastal town. As the warmth of the sun bathes Muroran, the spirit of renewal and vitality envelops the landscape, beckoning both locals and visitors to bask in its inviting glow.
April marks a notable increase in the likelihood of sunny weather in Muroran, Japan, with a 45% chance of sunshine—a significant jump from the earlier months of the year, where the percentages hover below 40%. This trend suggests a transition into a brighter season, as the dreariness of winter gives way to more frequent sunny days. While May sees a slight dip to 31%, the overall trajectory from January through April indicates a promising shift toward warmer, sunnier days, making it an ideal month for outdoor activities and enjoying the spring blooms. As the weather continues to improve, residents and visitors alike can look forward to a more cheerful and radiant atmosphere.
In Muroran, Japan, the transition into April marks a significant leap in daylight duration, with the sun gracing the region for an impressive 13 hours each day. This increase is part of a broader trend of gradually lengthening days as winter fades, progressing from 9 hours in January to 11 hours in March. Following April, the daylight peaks in June at a dazzling 15 hours, before gradually tapering off towards the end of the year. This rhythm of lengthening and shortening days not only brings more light to the spring and summer months but also allows residents to savor the vibrant beauty of nature as it awakens from winter's slumber.
In Muroran, Japan, the wind in April continues a trend of gentle breezes, with an average speed of 4.8 m/s (11 mph), matching the slightly calmer winds of March. As spring unfolds, this steadiness contrasts with the brisker months of January and February, where winds frequently reach around 7.0 m/s (16 mph) to 7.1 m/s (16 mph). Interestingly, the month's wind speed mirrors the quietude of March, hinting at a gradual reduction leading into the milder days of late spring. Following April, the winds slightly dip in May before rising again in August, presenting a fascinating ebb and flow that captures the seasonal transformation in this coastal locale.
Weather in Muroran varies notably across the year, with each month offering distinct climate conditions. This page compares April’s weather to other months in Muroran, focusing on differences in temperature, rainfall, humidity, and UV levels.
April and January showcase distinctly different weather patterns. In April, temperatures range from a minimum of 0°C (32°F) to an average of 6°C (42°F), peaking at 15°C (59°F), signaling the arrival of spring. In contrast, January brings colder conditions with temperatures ranging from a chilly -9°C (16°F) to an average of -1°C (30°F), and a maximum of 8°C (47°F). Notably, April receives more precipitation at 86 mm (3.4 in) over 11 days, compared to January's 66 mm (2.6 in) across 13 days. Humidity levels remain quite similar, with April at 81% and January at 84%. For more insights on January weather in Muroran, check out Muroran weather in January.
April and February present contrasting weather conditions. April sees a significant increase in temperature, with average highs reaching 15°C (59°F), compared to February's maximum of only 6°C (43°F). The transition into spring is marked by higher precipitation levels in April at 86 mm (3.4 in) over 11 days, while February records 59 mm (2.3 in) across 13 days. Humidity remains relatively similar, with April at 81% and February slightly higher at 83%. For more detailed weather information, you can check Muroran weather in February.
In comparing the weather between March and April, it is notable that April experiences noticeably milder temperatures, with average highs reaching 15°C (59°F), compared to March's maximum of 10°C (50°F). While both months share the same humidity level of 81%, April also sees slightly more precipitation, with 86 mm (3.4 in) over 11 days, compared to March’s 81 mm (3.2 in) across 9 days. These conditions signal a transition into spring, making April feel warmer and wetter than its predecessor. For more detailed insights, you can visit Muroran weather in March.
April and May present notable contrasts in weather patterns. In April, temperatures range from a chilly 0°C (32°F) at night to a mild 15°C (59°F) during the day, with an average temperature of 6°C (42°F). The month sees 86 mm (3.4 in) of precipitation over 11 days and maintains a high humidity level of 81%. In comparison, May ushers in warmer temperatures, with nighttime lows of 5°C (41°F) and daytime highs reaching 22°C (73°F), averaging around 10°C (50°F). Although May experiences slightly more precipitation at 99 mm (3.9 in) over 10 days, the humidity increases to 86%. These changes signal a clear transition from the cool, damp days of April to the more temperate conditions of May. For more details on May weather, visit Muroran weather in May.
April generally experiences cooler temperatures compared to June, with minimums around 0°C (32°F) and an average of 6°C (42°F), while June sees milder conditions with minimums at 9°C (48°F) and an average of 14°C (58°F). Precipitation increases in June, totaling 126 mm (5.0 in) over 11 days, compared to April's 86 mm (3.4 in) also over 11 days. Humidity levels are slightly higher in June at 87%, compared to April's 81%. For more details on the climate during this month, you can check Muroran weather in June.
April and July present a stark contrast in weather conditions. In April, temperatures range from a chilly minimum of 0°C (32°F) to a pleasant maximum of 15°C (59°F), with an average of 6°C (42°F). The month experiences significant precipitation, totaling 86 mm (3.4 in) over approximately 11 days, and humidity levels hover around 81%. In contrast, July brings much warmer temperatures, with a minimum of 13°C (55°F), an average of 19°C (66°F), and a maximum reaching up to 26°C (79°F). While July is slightly wetter, with a total of 128 mm (5.0 in) over 14 days, it also has higher humidity levels at 93%. This transition from the cool, damp atmosphere of April to the warm, humid climate of July highlights the seasonal shift. For more detailed weather statistics, you can refer to Muroran weather in July.
In comparing the weather between April and August, notable differences emerge in temperature and precipitation patterns. April features cooler temperatures, with a minimum of 0°C (32°F) and maximum of 15°C (59°F), and is characterized by higher relative humidity at 81%. The month also experiences moderate precipitation, totaling 86 mm (3.4 in) over 11 days. In contrast, August boasts much warmer conditions, with temperatures ranging from a minimum of 16°C (61°F) to a maximum of 27°C (82°F), and a higher average of 21°C (70°F). However, it also sees increased precipitation, accumulating 194 mm (7.7 in) over 15 days, alongside a higher humidity level of 95%. For more specifics on August weather, you can check Muroran weather in August.
April weather is characterized by cooler temperatures, ranging from a minimum of 0°C (32°F) to a maximum of 15°C (59°F), with an average of 6°C (42°F). This month experiences about 86 mm (3.4 in) of precipitation spread over 11 days, coupled with a humidity level of 81%. In contrast, September welcomes milder temperatures, with a minimum of 13°C (56°F) and a maximum of 27°C (81°F), averaging around 19°C (67°F). Precipitation in September is higher at 137 mm (5.4 in), occurring over 13 days and accompanied by a slightly higher humidity of 88%. For more details, you can check Muroran weather in September.
April and October present distinct weather profiles, highlighting the transition of seasons. In April, temperatures range from a chilly 0°C (32°F) to a mild 15°C (59°F), with an average temperature of 6°C (42°F). The month sees approximately 86 mm (3.4 in) of precipitation over 11 days, coupled with a high humidity of 81%. In contrast, October enjoys warmer conditions, with temperatures ranging from 6°C (43°F) at night to a comfortable high of 23°C (73°F) during the day. The average temperature is 14°C (58°F), and it experiences slightly more rainfall at 127 mm (5.0 in) over 12 days, while humidity rises marginally to 83%. For more insights on October weather, you can check Muroran weather in October.
April and November exhibit distinct weather patterns despite their proximity in the calendar. In April, temperatures range from a chilly minimum of 0°C (32°F) to a milder maximum of 15°C (59°F), averaging around 6°C (42°F). The month experiences a fair amount of rainfall, averaging 86 mm (3.4 in) over 11 days, coupled with a high humidity of 81%.
In contrast, November presents slightly cooler conditions, with temperatures dipping to a minimum of -3°C (28°F) and peaking at 17°C (62°F), giving an average of 8°C (46°F). The precipitation increases marginally to 95 mm (3.8 in) spread over 13 days, while humidity remains relatively low at 79%. For a closer look at November’s weather specifics, you can check out Muroran weather in November.
In April, temperatures begin to rise with a minimum of 0°C (32°F) and an average of 6°C (42°F), peaking at 15°C (59°F). With about 86 mm (3.4 in) of precipitation over 11 days, the weather is generally damp, accompanied by a humidity level of 81%. In stark contrast, December experiences colder conditions, with temperatures ranging from a minimum of -6°C (21°F) to an average of 1°C (35°F), and a maximum of 13°C (56°F). Interestingly, December also sees the same amount of precipitation—86 mm (3.4 in)—but it is spread over more days, totaling 21 days, while humidity remains fairly stable at 80%. For more detailed weather information, you can check Muroran weather in December.
As April in Muroran unfolds, the transition from the bitter chill of winter to the gentler warmth of spring becomes evident. While temperatures begin to rise, with an average around 6°C, the conditions can still feel brisk, especially in contrast to the impending summer months. The significant humidity and frequent rain with about 11 days of precipitation mark this month, underscoring its wet and often unpredictable nature. While other months may experience more consistent weather patterns, April's characteristic variability adds a unique charm to the region, making it a pivotal time for nature's awakening. To learn more about what to expect year-round, visit Muroran Climate.