April Weather in Kai, Japan

Last updated: August 23, 2025

In April, the average temperature in Kai, Japan hovers around 9°C (48°F). Expect to experience a wide range, with minimums dipping to -5°C (23°F) and maximums reaching up to 25°C (77°F). This month also brings about 129 mm (5.1 in) of precipitation spread over 13 days, while the average humidity sits at a comfortable 74%.

April Temperature in Kai

In April in Kai, the average temperature is 9°C (48°F), with maximums reaching 25°C (77°F) and minimums dropping as low as -5°C (23°F). Travelers should be prepared for a wide range of temperatures, ensuring they pack layers for both warm days and cooler nights.

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

The chart illustrates April temperature patterns in Kai, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Kai, April typically has an average temperature of 9°C (48°F), with highs reaching up to 25°C (77°F) and lows dropping to around -5°C (23°F).

Data source: Temperature data for Kai generated using information from the Copernicus Climate Change Service.

April Precipitation in Kai

In Kai in April, the precipitation amount is 129 mm (5.1 in) over the course of 13 days.

April Precipitation Trends in Kai

The chart displays monthly precipitation patterns in Kai, 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 Kai, April typically receives around 129 mm (5.1 inches) of precipitation spread over approximately 13 days.

Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

April Humidity in Kai

In Kai in April humidity is 74%. With an average temperature of 9°C (48°F), this humidity feels like a damp chill that seeps into your bones, making travel uncomfortable and necessitating warm layers to fully enjoy your explorations.

April Average Humidity in Kai

This chart illustrates the average monthly humidity levels in Kai, 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 Kai is approximately 74%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in Kai

In Kai in April, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Kai.

Maximum UV Index Levels in Kai for April

The chart shows the monthly maximum UV Index (UVI) for Kai 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 Kai typically reaches 10, which falls under the very high exposure category.

Data source: Kai 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 Kai Compares to Other Months

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

This table compares monthly weather conditions in Kai, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-1°C (30°F)	48 mm (1.9 inches)	76%	moderate
February Weather	0°C (32°F)	60 mm (2.4 inches)	74%	high
March Weather	4°C (40°F)	136 mm (5.4 inches)	70%	very high
April Weather	9°C (48°F)	129 mm (5.1 inches)	74%	very high
May Weather	14°C (58°F)	138 mm (5.4 inches)	81%	extreme
June Weather	17°C (64°F)	147 mm (5.8 inches)	88%	extreme
July Weather	21°C (70°F)	293 mm (11.6 inches)	93%	extreme
August Weather	23°C (73°F)	150 mm (5.9 inches)	90%	extreme
September Weather	18°C (65°F)	183 mm (7.2 inches)	86%	very high
October Weather	13°C (55°F)	277 mm (10.9 inches)	83%	high
November Weather	7°C (45°F)	52 mm (2.0 inches)	80%	high
December Weather	1°C (35°F)	54 mm (2.1 inches)	78%	moderate