April Weather in Osaka, Japan

Last updated: August 21, 2025

April in Osaka, Japan brings a delightful mix of mild temperatures and vibrant spring colors. With maximum temperatures reaching 26°C (79°F) and an average of 15°C (59°F), the month offers a pleasant ambiance for outdoor exploration. However, be prepared for some rain, as 135 mm (5.3 in) of precipitation falls over approximately 10 days, contributing to the region's lush landscapes. A humidity level of 76% adds a touch of dampness, making the air feel fresh and invigorating. Overall, April is a captivating time to experience the beauty of Osaka in bloom.

April Temperature in Osaka

In April, Osaka experiences a notable shift as winter yields to the warmth of spring. With minimum temperatures rising to 3°C (37°F) and averaging a comfortable 15°C (59°F), residents and visitors alike can shed their heavy coats, welcoming the vibrant blossoms that herald the season. The maximum temperatures reach a pleasant 26°C (79°F), inviting outdoor exploration and leisurely strolls through the city’s picturesque parks. This transition from the chill of March not only brings milder weather but also signals the beginning of Osaka's lively outdoor festivals, making it an ideal time to experience the blooming landscapes and cultural celebrations. As the month progresses, the gentle warmth sets the stage for the gradual rise into the summer months, charting a clear journey from the cooler start of the year to the balmy days ahead.

April Weather in Osaka: Daily Temperature Highs, Lows, and Averages

The chart illustrates April temperature patterns in Osaka, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Osaka, April typically has an average temperature of {2}°C ({3}°F), with highs reaching up to {4}°C ({5}°F) and lows dropping to around {6}°C ({7}°F).
JanFebMarAprMayJunJulAugSepOctNovDec424351596874828577675647
Data source: Temperature data for Osaka generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

April Precipitation in Osaka

In April, Osaka experiences a notable increase in precipitation, with rainfall totaling 135 mm (5.3 in) over 10 days. This surge follows the 109 mm (4.3 in) recorded in March, signaling the arrival of spring with its characteristic showers. As temperatures rise and foliage flourishes, April stands out as a month where the city receives a significant portion of its annual rainfall, bridging the transition toward the wet months ahead. This trend sets the stage for May's even greater 150 mm (5.9 in), suggesting that April's rains are merely a prelude to the summer deluge, making the landscape vibrant and lush while also preparing residents for the impending flood of seasonal showers.

April Precipitation Trends in Osaka

The chart displays monthly precipitation patterns in Osaka, with values for each month alongside April’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how April’s conditions compare to those of other months. In Osaka, April typically receives around {2} mm ({3} inches) of precipitation spread over approximately {4} days.
JanFebMarAprMayJunJulAugSepOctNovDec46601091351501472821831692304457
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

April Humidity in Osaka

In April, Osaka's humidity settles at a comfortable 76%, marking a slight increase from March's 74%. This transitional month hints at the approach of more humid days ahead, as the summer months loom with June and July reaching a peak of 87% and an impressive 93%, respectively. Interestingly, April's humidity is lower than the preceding and succeeding months, suggesting a brief window of relief before the sticky heat of May kicks in, where humidity spikes to 83%. Overall, April serves as a gentle reminder of the vibrant changes in Osaka's climate, offering a balance between the freshness of spring and the impending warmth of summer.

April Average Humidity in Osaka

This chart illustrates the average monthly humidity levels in Osaka, with April’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In April, average humidity in Osaka is approximately {2}%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%79%74%76%83%87%93%91%87%85%83%83%
Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in Osaka

As spring unfolds in Osaka, April witnesses a dramatic surge in the UV Index, soaring to an extreme level of 11, which necessitates a careful approach to sun exposure. This significant increase follows a progression from a moderate 4 in January to a staggering 8 in March, indicating a trend of intensifying UV radiation as the months transition toward summer. With a burn time reduced to just 10 minutes, it's crucial for residents and visitors alike to take protective measures when venturing outdoors. As we see the UV Index remain at this extreme level into May and June, awareness and preparation become essential for enjoying the beautiful outdoor scenes that Osaka has to offer without compromising skin health. For more details, check out Osaka UV Index.

Maximum UV Index Levels in Osaka for April

The chart shows the monthly maximum UV Index (UVI) for Osaka in April, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In April, the maximum UV index in Osaka typically reaches {2}, which falls under the {3} exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec468111111121110753
Data source: Osaka April UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

April Sunshine in Osaka

As April unfolds in Osaka, the city basks in 279 hours of glorious sunlight, marking a delightful transition from the earlier months of winter. This surge in sunshine follows a steady climb from 185 hours in January, showing a clear trend of increasing daylight as spring takes hold. Each month builds upon the last, with March’s 265 hours serving as an energizing precursor to April's luminous days. The growth continues into May, peaking at 291 hours, as residents and visitors alike revel in the vibrant atmosphere. With summer on the horizon, the trend demonstrates an enticing promise of longer, sun-kissed days ahead, capturing the beauty of this season in Osaka.

Monthly Sunshine Duration in Osaka: April Highlighted

The April sunshine duration represents the total number of hours Osaka experiences direct sunlight during the month of April, excluding cloudy or obstructed periods. This chart compares the sunshine duration of April with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec185h229h265h279h291h268h258h305h242h237h236h221h
Data source: Osaka April Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Osaka During April

April in Osaka, Japan, offers a 45% chance of sunny weather, reflecting a moderate likelihood for those looking to enjoy the outdoors. This percentage is a slight dip from the preceding months of January and February, which boast higher chances of sunshine at 49% and 52% respectively. Interestingly, as spring settles in, the chance for bright days decreases further into May, hitting a low of 29%. Comparatively, the transition from winter to spring does not guarantee the same sunny disposition, making April a period where both possibilities and unpredictabilities coexist. As the month progresses, residents and visitors alike can anticipate variable weather, perhaps perfect for enjoying the cherry blossoms under partially cloudy skies.

Percentage of Sunny Days in April in Osaka

The chart illustrates the percentage of sunny days in Osaka throughout the year, with April highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Osaka experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec49%52%41%45%29%24%32%28%30%53%52%57%
Data source: Osaka April chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Osaka in April

As spring unfolds in Osaka, April brings a significant jump in daylight duration, basking the city in 13 hours of sunlight. This increase from 11 hours in March heralds the arrival of warmer days and longer evenings, encouraging outdoor activities and blossoming festivities. Following the trend, both May and June maintain this generous daylight, reaching up to 14 hours, before gradually tapering off as summer gives way to fall. The rhythm of daylight reflects the changing seasons, inviting residents and visitors alike to embrace the beauty of nature and the vibrant life that flourishes in this enchanting city.

Average Daylight Hours in Osaka for April

The chart illustrates the variation in daylight duration in Osaka throughout the year, with April highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec10h 5m10h 54m11h 58m13h 3m13h 58m14h 25m14h 12m13h 24m12h 21m11h 16m10h 20m9h 51m
Data source: Osaka daylight hours, calculated by summing the hours between sunrise and sunset for each day.

April Winds in Osaka

As April blossoms in Osaka, the average wind speed settles at a gentle 2.7 m/s (6 mph), mirroring the mild conditions of March and maintaining the same soothing breeze into May. This consistency in wind patterns suggests a transitional period where winter's chill gives way to the warmth of spring, creating an inviting atmosphere perfect for outdoor explorations. As the months progress toward summer, the wind speed begins to decline, dipping to 1.8 m/s (4 mph) by June, signaling a shift toward the more humid and still days that characterize the Japanese summer. Thus, April stands as a pivotal point in Osaka's climatic rhythm, balancing between the cool remnants of spring and the approaching heat.

Average April Wind Speed in Osaka

The chart displays monthly wind speed patterns in Osaka, with values for each month shown alongside April's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how April's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec2.93.12.72.7 m/s2.71.82.02.42.22.22.32.8
Data source: Osaka April wind data, generated using information from the Copernicus Climate Change Service.

How April Weather in Osaka Compares to Other Months

Weather in Osaka varies notably across the year, with each month offering distinct climate conditions. This page compares April’s weather to other months in Osaka, focusing on differences in temperature, rainfall, humidity, and UV levels.

April and January present contrasting weather patterns in Osaka. April boasts a milder climate, with temperatures ranging from a minimum of 3°C (37°F) to a maximum of 26°C (79°F) and an average of 15°C (59°F). In comparison, January features colder temperatures, with a minimum of -3°C (26°F) and a maximum of 18°C (64°F), averaging around 6°C (42°F). Precipitation is also significantly higher in April, totaling 135 mm (5.3 in) over approximately 10 days, while January sees just 46 mm (1.8 in) throughout 6 days. Additionally, humidity levels are slightly higher in January at 82%, compared to April's 76%. For more details about the cold month, check out Osaka weather in January.

April weather in Osaka is significantly warmer than February, with average temperatures rising from February's 6°C (43°F) to a pleasant 15°C (59°F) in April. The maximum temperature in April can reach up to 26°C (79°F), compared to February's highest at 20°C (68°F). While April sees more rainfall with 135 mm (5.3 in) over about 10 days, February is relatively drier with only 60 mm (2.3 in) across 6 days. Humidity remains fairly consistent, with April at 76% and February slightly higher at 79%. For a deeper dive into February's climate specifics, you can check out Osaka weather in February.

April weather in Osaka marks a notable shift compared to March, with an increase in average temperatures from 10°C (51°F) to 15°C (59°F). This month features a milder temperature range, with minimums rising from -1°C (31°F) to 3°C (37°F) and maximums reaching up to 26°C (79°F) compared to March's peak of 23°C (73°F). Precipitation also sees a slight uptick, with April recording 135 mm (5.3 in) over 10 rainy days, while March had 109 mm (4.3 in) across 11 days. Humidity remains fairly consistent, slightly increasing from 74% in March to 76% in April. For a detailed look at March's climate, you can visit Osaka weather in March.

April and May present distinct shifts in weather patterns. In April, temperatures range from a chilly minimum of 3°C (37°F) to a pleasant average of 15°C (59°F), with maximums peaking at 26°C (79°F). Precipitation is relatively high at 135 mm (5.3 in), falling across about 10 days, and the humidity sits at 76%. In contrast, May sees an increase in temperatures, with minimums rising to 8°C (47°F) and averages reaching 20°C (69°F). Maximum temperatures can soar to 31°C (88°F) while precipitation slightly increases to 150 mm (5.9 in) over the same number of wet days, accompanied by a rise in humidity to 83%. For detailed insights about the weather during this time, you can visit Osaka weather in May.

April weather tends to be cooler and more unpredictable compared to June, with temperatures ranging from a minimum of 3°C (37°F) to a maximum of 26°C (79°F) and an average of 15°C (59°F). While April experiences around 135 mm (5.3 in) of precipitation over approximately 10 days, humidity levels sit at 76%. In contrast, June brings warmer temperatures, with a minimum of 14°C (58°F), an average of 24°C (75°F), and a maximum of 32°C (89°F). Although June has slightly higher precipitation at 147 mm (5.8 in) over about 12 days, the humidity is higher at 87%. For more detailed information, you can check Osaka weather in June.

April and July present notably contrasting weather conditions. In April, temperatures range from a cool minimum of 3°C (37°F) to a comfortable average of 15°C (59°F), peaking at a warm 26°C (79°F). The month experiences significant rainfall, with 135 mm (5.3 in) spread across about 10 days, and the humidity hovers around 76%. In stark contrast, July sees much warmer weather, where temperatures rise dramatically, with a minimum of 20°C (69°F), an average of 28°C (82°F), and maximums reaching a sweltering 37°C (99°F). Rainfall is even more pronounced, totaling 282 mm (11.1 in) over approximately 18 days, accompanied by high humidity levels of 93%. For more detailed insights into the climate specifics, you can check Osaka weather in July.

April and August present contrasting weather conditions. In April, temperatures range from a chilly minimum of 3°C (37°F) to a pleasant average of 15°C (59°F), peaking at 26°C (79°F). The month is characterized by moderate rainfall, receiving 135 mm (5.3 in) over approximately 10 days and a humidity level of 76%. In stark contrast, August experiences much warmer temperatures, with a minimum of 19°C (66°F), an average of 29°C (85°F), and highs soaring up to 38°C (101°F). Rainfall is more abundant in August, with 183 mm (7.2 in) spread over about 12 days, and humidity levels reaching a sticky 91%. For more detailed insights into August weather, you can check Osaka weather in August.

April and September present distinct weather contrasts. In April, temperatures range from a chilly minimum of 3°C (37°F) to a comfortable maximum of 26°C (79°F), with an average of 15°C (59°F). This month typically experiences 135 mm (5.3 in) of precipitation over about 10 days and a humidity level of 76%. In contrast, September warms up significantly, with temperatures starting at a minimum of 15°C (59°F) and going up to a sweltering maximum of 37°C (99°F), averaging around 25°C (78°F). This month sees increased precipitation of 169 mm (6.7 in) across approximately 15 days, accompanied by higher humidity at 87%. For a detailed look at the conditions during September, you can refer to Osaka weather in September.

April and October present distinct weather patterns, with April experiencing milder temperatures ranging from a minimum of 3°C (37°F) to a maximum of 26°C (79°F) and an average of 15°C (59°F). April typically sees about 135 mm (5.3 in) of precipitation over 10 days, alongside a humidity level of 76%. In contrast, October is generally warmer, with temperatures ranging from a minimum of 8°C (46°F) to a maximum of 33°C (91°F) and an average of 20°C (67°F). This month also has higher precipitation, totaling around 230 mm (9.0 in) over 12 days, and a slight increase in humidity at 85%. For more detailed information on October's weather, you can check Osaka weather in October.

April and November present quite different weather patterns. In April, temperatures range from a minimum of 3°C (37°F) to a maximum of 26°C (79°F), with an average of 15°C (59°F). The month experiences substantial rainfall, totaling 135 mm (5.3 in) over approximately 10 days, and has a humidity level of 76%.

In contrast, November features slightly cooler temperatures, with a minimum of 2°C (35°F), an average of 13°C (56°F), and a maximum of 25°C (78°F). Precipitation in November is significantly lower at 44 mm (1.7 in) over about 6 days, while the humidity increases to 83%. For more details, you can check Osaka weather in November.

April and December present contrasting weather patterns, with April generally being warmer and wetter. In April, temperatures range from a mild 3°C (37°F) to a pleasant 26°C (79°F), with an average of 15°C (59°F) and significant precipitation of 135 mm (5.3 in) over approximately 10 days. This month experiences a humidity level of 76%. In contrast, December features cooler temperatures, ranging from a minimum of -1°C (30°F) to a maximum of 22°C (71°F), with an average of 8°C (47°F). The precipitation drops to 57 mm (2.2 in) across only 6 days, and humidity is slightly higher at 83%. For more detailed information on December weather, you can check Osaka weather in December.

Compare Osaka's Climate with Cities Worldwide

Conclusion: What to Expect From April Weather in Osaka

As April ushers in a refreshing change in Osaka's climate, the city transforms with blooming cherry blossoms and milder temperatures. Unlike the cooler, harsher winter months, April boasts more comfortable weather, with daytime highs reaching a pleasant 26°C (79°F) and an average temperature of around 15°C (59°F). However, a moderate level of humidity at 76% and an average of 10 rainy days, totaling approximately 135 mm (5.3 in) of precipitation, remind residents and visitors alike that spring showers are not uncommon. This unique blend of warmth and moisture sets April apart, inviting exploration and outdoor activities as nature comes to life. For more insights, check out Osaka Climate.