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April Weather in Onojo, Japan

Last updated: August 23, 2025

In April, the average temperature in Onojo, Japan is a pleasant 15°C (59°F). Be prepared for a range, as temperatures can dip to a minimum of 2°C (37°F) and soar to a maximum of 28°C (83°F). You'll also experience 115 mm (4.5 in) of precipitation spread over 9 days, making for a humidity average of 78%.

April Temperature in Onojo

In April in Onojo, the average temperature is 15°C (59°F). Maximum temperatures can reach 28°C (83°F), while the minimum can drop to as low as 2°C (37°F). This makes Onojo a great destination for travelers seeking mild weather, but it's wise to pack layers for varying conditions.

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

The chart illustrates April temperature patterns in Onojo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Onojo, April typically has an average temperature of 15°C (59°F), with highs reaching up to 28°C (83°F) and lows dropping to around 2°C (37°F).
JanFebMarAprMayJunJulAugSepOctNovDec434452596874808376665546
Data source: Temperature data for Onojo generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

April Precipitation in Onojo

In Onojo in April, the precipitation amount is 115 mm (4.5 in) over the course of 9 days, indicating a relatively wet period for the region.

April Precipitation Trends in Onojo

The chart displays monthly precipitation patterns in Onojo, 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 Onojo, April typically receives around 115 mm (4.5 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec58801211151631993673032061135268
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in Onojo

In Onojo in April, humidity is 78%. With an average temperature of 15°C (59°F), this humidity feels like a warm, enveloping blanket that clings to your skin, making outdoor activities a bit more tiring and requiring frequent breaks for hydration as you explore the area.

April Average Humidity in Onojo

This chart illustrates the average monthly humidity levels in Onojo, 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 Onojo is approximately 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec75%71%71%78%84%86%92%91%84%83%81%79%
Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in Onojo

In Onojo in April, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Onojo.

Maximum UV Index Levels in Onojo for April

The chart shows the monthly maximum UV Index (UVI) for Onojo 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 Onojo typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec468111111121211764
Data source: Onojo 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.

How April Weather in Onojo Compares to Other Months

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

This table compares monthly weather conditions in Onojo, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather6°C (43°F)58 mm (2.3 inches)75%moderate
February Weather7°C (45°F)80 mm (3.1 inches)71%high
March Weather11°C (52°F)121 mm (4.8 inches)71%very high
April Weather15°C (59°F)115 mm (4.5 inches)78%extreme
May Weather20°C (68°F)163 mm (6.4 inches)84%extreme
June Weather23°C (74°F)199 mm (7.8 inches)86%extreme
July Weather27°C (81°F)367 mm (14.4 inches)92%extreme
August Weather28°C (83°F)303 mm (11.9 inches)91%extreme
September Weather24°C (76°F)206 mm (8.1 inches)84%extreme
October Weather19°C (67°F)113 mm (4.5 inches)83%high
November Weather13°C (56°F)52 mm (2.1 inches)81%high
December Weather8°C (46°F)68 mm (2.7 inches)79%moderate

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