July Weather in Koya, Japan

Last updated: August 23, 2025

In July, the average temperature in Koya, Japan hovers around a warm 26°C (79°F). Expect a range where the minimum dips to 18°C (65°F) and the maximum can soar up to 35°C (95°F). However, prepare for wet days as the region experiences about 324 mm (12.7 in) of precipitation over 21 days, accompanied by a high average humidity of 93%.

July Temperature in Koya

In July in Koya, the average temperature is 26°C (79°F). Maximum temperatures can reach 35°C (95°F), while the minimum can drop to as low as 18°C (65°F). This makes it an ideal time for travelers to enjoy a warm climate while exploring the outdoor attractions.

July Weather in Koya: Daily Temperature Highs, Lows, and Averages

The chart illustrates July temperature patterns in Koya, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Koya, July typically has an average temperature of 26°C (79°F), with highs reaching up to 35°C (95°F) and lows dropping to around 18°C (65°F).

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

July Precipitation in Koya

In Koya in July, the precipitation amount is 324 mm (12.7 in) spread over 21 days.

July Precipitation Trends in Koya

The chart displays monthly precipitation patterns in Koya, with values for each month alongside July’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how July’s conditions compare to those of other months. In Koya, July typically receives around 324 mm (12.7 inches) of precipitation spread over approximately 21 days.

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

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Millimeters (mm) Inches (in)

July Humidity in Koya

In Koya in July, humidity is 93%. With an average temperature of 26°C (79°F), this humidity feels like a warm, damp blanket enveloping you, making every outdoor adventure feel like a steamy, tropical experience that can quickly lead to discomfort if you're not prepared.

July Average Humidity in Koya

This chart illustrates the average monthly humidity levels in Koya, with July’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In July, average humidity in Koya is approximately 93%, offering insight into how humid the weather typically is during this month.

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

July UV Index in Koya

In Koya in July, the maximum UV index is 12, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, underscoring the importance of sun protection. For detailed information, you can check the Hourly UV Index in Koya.

Maximum UV Index Levels in Koya for July

The chart shows the monthly maximum UV Index (UVI) for Koya in July, 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 July, the maximum UV index in Koya typically reaches 12, which falls under the extreme exposure category.

Data source: Koya July 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 July Weather in Koya Compares to Other Months

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

This table compares monthly weather conditions in Koya, showing how July’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	4°C (40°F)	67 mm (2.6 inches)	82%	moderate
February Weather	5°C (41°F)	83 mm (3.3 inches)	79%	high
March Weather	9°C (49°F)	127 mm (5.0 inches)	74%	very high
April Weather	14°C (57°F)	132 mm (5.2 inches)	76%	extreme
May Weather	19°C (66°F)	169 mm (6.7 inches)	83%	extreme
June Weather	22°C (72°F)	220 mm (8.7 inches)	87%	extreme
July Weather	26°C (79°F)	324 mm (12.7 inches)	93%	extreme
August Weather	28°C (82°F)	203 mm (8.0 inches)	91%	extreme
September Weather	24°C (75°F)	204 mm (8.0 inches)	87%	very high
October Weather	18°C (65°F)	265 mm (10.5 inches)	85%	high
November Weather	12°C (54°F)	62 mm (2.4 inches)	83%	high
December Weather	7°C (44°F)	79 mm (3.1 inches)	83%	moderate