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April Weather in Kosaka, Japan

Last updated: August 23, 2025

In April, the average temperature in Kosaka, Japan hovers around 7°C (45°F). Expect a range from a chilly -6°C (21°F) to a warm 22°C (72°F), making it essential to dress in layers. The region experiences approximately 127 mm (5.0 in) of precipitation over about 17 days, contributing to an average humidity level of 78%. Stay prepared for a mix of weather as you explore this beautiful destination!

April Temperature in Kosaka

In April in Kosaka, the average temperature is 7°C (45°F), with maximums reaching up to 22°C (72°F) and minimums dropping as low as -6°C (21°F). This wide range in temperatures means travelers should be prepared for both mild and chilly weather.

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

The chart illustrates April temperature patterns in Kosaka, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Kosaka, April typically has an average temperature of 7°C (45°F), with highs reaching up to 22°C (72°F) and lows dropping to around -6°C (21°F).
JanFebMarAprMayJunJulAugSepOctNovDec262735455763717265534230
Data source: Temperature data for Kosaka 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 Kosaka

In Kosaka in April, the precipitation amount is 127 mm (5.0 in) over the course of 17 days.

April Precipitation Trends in Kosaka

The chart displays monthly precipitation patterns in Kosaka, 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 Kosaka, April typically receives around 127 mm (5.0 inches) of precipitation spread over approximately 17 days.
JanFebMarAprMayJunJulAugSepOctNovDec78108107127116142168179137166100114
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

April Humidity in Kosaka

In Kosaka in April, humidity is 78%. With an average temperature of 7°C (45°F), this humidity feels like a damp chill that seeps into your bones, making outdoor exploration less enjoyable and necessitating cozy, layered clothing for comfort while traveling.

April Average Humidity in Kosaka

This chart illustrates the average monthly humidity levels in Kosaka, 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 Kosaka is approximately 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec79%78%77%78%86%91%95%97%89%82%78%77%
Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in Kosaka

In Kosaka 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 Kosaka.

Maximum UV Index Levels in Kosaka for April

The chart shows the monthly maximum UV Index (UVI) for Kosaka 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 Kosaka typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec346891010119642
Data source: Kosaka 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 Kosaka Compares to Other Months

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

This table compares monthly weather conditions in Kosaka, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (26°F)78 mm (3.1 inches)79%moderate
February Weather-3°C (28°F)108 mm (4.3 inches)78%moderate
March Weather2°C (35°F)107 mm (4.2 inches)77%high
April Weather7°C (45°F)127 mm (5.0 inches)78%very high
May Weather14°C (57°F)116 mm (4.6 inches)86%very high
June Weather17°C (63°F)142 mm (5.6 inches)91%very high
July Weather22°C (71°F)168 mm (6.6 inches)95%very high
August Weather22°C (73°F)179 mm (7.1 inches)97%extreme
September Weather18°C (65°F)137 mm (5.4 inches)89%very high
October Weather12°C (54°F)166 mm (6.5 inches)81%high
November Weather6°C (42°F)100 mm (4.0 inches)78%moderate
December Weather-1°C (30°F)114 mm (4.5 inches)77%low

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