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April Weather in Hiroo, Japan

Last updated: August 23, 2025

In Hiroo, Japan, the average temperature in April hovers around 5°C (42°F). Expect a chilly minimum of -6°C (22°F) and a mild maximum reaching 18°C (64°F). During this month, anticipate 97 mm (3.8 in) of precipitation spread over approximately 12 days, accompanied by an average humidity level of 83%. Prepare for cozy, rainy days ahead!

April Temperature in Hiroo

In April in Hiroo, the average temperature is 5°C (42°F). The maximum can reach 18°C (64°F), while the minimum can be as low as -6°C (22°F). This range makes it essential for travelers to pack both warm clothing for the chilly days and lighter layers for the occasional warmer spells.

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

The chart illustrates April temperature patterns in Hiroo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Hiroo, April typically has an average temperature of 5°C (42°F), with highs reaching up to 18°C (64°F) and lows dropping to around -6°C (22°F).
JanFebMarAprMayJunJulAugSepOctNovDec242433425257656763534330
Data source: Temperature data for Hiroo 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 Hiroo

In Hiroo in April, the precipitation amount is 97 mm (3.8 in) spread over 12 days.

April Precipitation Trends in Hiroo

The chart displays monthly precipitation patterns in Hiroo, 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 Hiroo, April typically receives around 97 mm (3.8 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec616511597951051061751402019066
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in Hiroo

In Hiroo in April, humidity is 83%. With an average temperature of 5°C (42°F), this humidity feels like a heavy blanket wrapping around you, making even the simplest outdoor activities feel exhausting and uncomfortable for traveling.

April Average Humidity in Hiroo

This chart illustrates the average monthly humidity levels in Hiroo, 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 Hiroo is approximately 83%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%83%83%83%86%88%93%96%89%83%80%79%
Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in Hiroo

In Hiroo in April, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Hiroo.

Maximum UV Index Levels in Hiroo for April

The chart shows the monthly maximum UV Index (UVI) for Hiroo 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 Hiroo typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec236891010108632
Data source: Hiroo 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 Hiroo Compares to Other Months

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

This table compares monthly weather conditions in Hiroo, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-5°C (24°F)61 mm (2.4 inches)84%low
February Weather-4°C (25°F)65 mm (2.6 inches)83%moderate
March Weather1°C (34°F)115 mm (4.5 inches)83%high
April Weather5°C (42°F)97 mm (3.8 inches)83%very high
May Weather11°C (52°F)95 mm (3.7 inches)86%very high
June Weather14°C (58°F)105 mm (4.1 inches)88%very high
July Weather18°C (65°F)106 mm (4.2 inches)93%very high
August Weather19°C (67°F)175 mm (6.9 inches)96%very high
September Weather17°C (63°F)140 mm (5.5 inches)89%very high
October Weather12°C (54°F)201 mm (7.9 inches)83%high
November Weather6°C (43°F)90 mm (3.6 inches)80%moderate
December Weather-1°C (30°F)66 mm (2.6 inches)79%low

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