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April Weather in Semboku, Japan

Last updated: August 23, 2025

In April, the average temperature in Semboku, Japan hovers around 6°C (44°F). Expect a chilly minimum of -8°C (18°F), while temperatures can rise to a pleasant 22°C (71°F). Be prepared for 170 mm (6.7 in) of precipitation over 18 days, contributing to an average humidity of 75%.

April Temperature in Semboku

In April in Semboku, the average temperature is 6°C (44°F). Maximums can reach 22°C (71°F), and minimums can be as low as -8°C (18°F). Be prepared for diverse weather conditions while exploring the beauty of Semboku during this time.

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

The chart illustrates April temperature patterns in Semboku, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Semboku, April typically has an average temperature of 6°C (44°F), with highs reaching up to 22°C (71°F) and lows dropping to around -8°C (18°F).
JanFebMarAprMayJunJulAugSepOctNovDec252634445663717264534129
Data source: Temperature data for Semboku 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 Semboku

In Semboku in April, the precipitation amount is 170 mm (6.7 in) over the course of 18 days.

April Precipitation Trends in Semboku

The chart displays monthly precipitation patterns in Semboku, 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 Semboku, April typically receives around 170 mm (6.7 inches) of precipitation spread over approximately 18 days.
JanFebMarAprMayJunJulAugSepOctNovDec105140141170160182237238170179134153
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in Semboku

In Semboku in April humidity is 75%. With an average temperature of 6°C (44°F), this humidity feels like a chilly, damp blanket wrapping around you, making travel less enjoyable as the moisture clings to your skin and seeps into your clothes, leaving you feeling uncomfortable and clammy.

April Average Humidity in Semboku

This chart illustrates the average monthly humidity levels in Semboku, 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 Semboku is approximately 75%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec80%79%77%75%80%87%92%92%86%82%79%80%
Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in Semboku

In Semboku in April, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Semboku.

Maximum UV Index Levels in Semboku for April

The chart shows the monthly maximum UV Index (UVI) for Semboku 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 Semboku typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec346991010119643
Data source: Semboku 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 Semboku Compares to Other Months

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

This table compares monthly weather conditions in Semboku, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-4°C (25°F)105 mm (4.1 inches)80%moderate
February Weather-3°C (26°F)140 mm (5.5 inches)79%moderate
March Weather1°C (34°F)141 mm (5.6 inches)77%high
April Weather6°C (44°F)170 mm (6.7 inches)75%very high
May Weather13°C (56°F)160 mm (6.3 inches)80%very high
June Weather17°C (63°F)182 mm (7.2 inches)87%very high
July Weather21°C (71°F)237 mm (9.3 inches)92%very high
August Weather22°C (73°F)238 mm (9.4 inches)92%extreme
September Weather18°C (65°F)170 mm (6.7 inches)86%very high
October Weather12°C (54°F)179 mm (7.1 inches)82%high
November Weather5°C (42°F)134 mm (5.3 inches)79%moderate
December Weather-1°C (30°F)153 mm (6.0 inches)80%moderate

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