June Weather in Kosai, Japan

Last updated: August 23, 2025

In June, the average temperature in Kosai, Japan hovers around 23°C (74°F). Temperatures can fluctuate between a minimum of 15°C (59°F) and a maximum of 33°C (92°F). Expect 240 mm (9.4 in) of precipitation spread over 15 days, accompanied by a high average humidity of 87%. Be prepared for a warm and humid month!

June Temperature in Kosai

In June in Kosai, the average temperature is 23°C (74°F). Maximum temperatures can reach 33°C (92°F), while minimums can dip to as low as 15°C (59°F). Overall, this climate makes it an ideal time for travelers looking to enjoy pleasant weather and outdoor activities in Kosai.

June Weather in Kosai: Daily Temperature Highs, Lows, and Averages

The chart illustrates June temperature patterns in Kosai, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Kosai, June typically has an average temperature of 23°C (74°F), with highs reaching up to 33°C (92°F) and lows dropping to around 15°C (59°F).

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

June Precipitation in Kosai

In Kosai in June, the precipitation amount is 240 mm (9.4 in) spread over 15 days.

June Precipitation Trends in Kosai

The chart displays monthly precipitation patterns in Kosai, with values for each month alongside June’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how June’s conditions compare to those of other months. In Kosai, June typically receives around 240 mm (9.4 inches) of precipitation spread over approximately 15 days.

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

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Millimeters (mm) Inches (in)

June Humidity in Kosai

In Kosai in June, humidity is 87%. With an average temperature of 23°C (74°F), this humidity feels like a warm, sticky embrace that can quickly wear you down while traveling, making even short walks feel exhausting and necessitating frequent breaks for hydration and cool air.

June Average Humidity in Kosai

This chart illustrates the average monthly humidity levels in Kosai, with June’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In June, average humidity in Kosai is approximately 87%, offering insight into how humid the weather typically is during this month.

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

June UV Index in Kosai

In Kosai in June, 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 Kosai.

Maximum UV Index Levels in Kosai for June

The chart shows the monthly maximum UV Index (UVI) for Kosai in June, 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 June, the maximum UV index in Kosai typically reaches 11, which falls under the extreme exposure category.

Data source: Kosai June 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 June Weather in Kosai Compares to Other Months

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

This table compares monthly weather conditions in Kosai, showing how June’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	6°C (44°F)	49 mm (1.9 inches)	82%	moderate
February Weather	7°C (45°F)	69 mm (2.7 inches)	79%	moderate
March Weather	12°C (53°F)	154 mm (6.1 inches)	74%	very high
April Weather	16°C (60°F)	160 mm (6.3 inches)	76%	very high
May Weather	20°C (69°F)	187 mm (7.4 inches)	83%	extreme
June Weather	23°C (74°F)	240 mm (9.4 inches)	87%	extreme
July Weather	27°C (81°F)	385 mm (15.2 inches)	93%	extreme
August Weather	29°C (85°F)	189 mm (7.4 inches)	91%	extreme
September Weather	25°C (78°F)	217 mm (8.5 inches)	87%	very high
October Weather	20°C (68°F)	284 mm (11.2 inches)	85%	high
November Weather	14°C (58°F)	75 mm (2.9 inches)	83%	moderate
December Weather	9°C (48°F)	65 mm (2.6 inches)	83%	moderate