July Weather in Seiyo, Japan

Last updated: August 23, 2025

In July, the average temperature in Seiyo, Japan hovers around 25°C (78°F). Expect a comfortable minimum of 17°C (62°F), while the mercury can rise to a maximum of 34°C (94°F). However, prepare for some rain, as the region receives an average precipitation of 409 mm (16.1 in) over approximately 20 days, maintaining a high average humidity of 91%.

July Temperature in Seiyo

In July in Seiyo, the average temperature is 25°C (78°F), with maximums reaching 34°C (94°F) and minimums dropping as low as 17°C (62°F). This delightful weather makes it an ideal time for outdoor activities and sightseeing.

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

The chart illustrates July temperature patterns in Seiyo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Seiyo, July typically has an average temperature of 25°C (78°F), with highs reaching up to 34°C (94°F) and lows dropping to around 17°C (62°F).

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

July Precipitation in Seiyo

In Seiyo in July, the total precipitation amount is 409 mm (16.1 in) spread over 20 days.

July Precipitation Trends in Seiyo

The chart displays monthly precipitation patterns in Seiyo, 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 Seiyo, July typically receives around 409 mm (16.1 inches) of precipitation spread over approximately 20 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

July Humidity in Seiyo

In Seiyo in July, humidity is 91%. With an average temperature of 25°C (78°F), this humidity feels like a warm, sticky embrace, making travel feel heavy and sluggish as you navigate through the air thick with moisture.

July Average Humidity in Seiyo

This chart illustrates the average monthly humidity levels in Seiyo, 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 Seiyo is approximately 91%, 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 Seiyo

In Seiyo 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 Seiyo.

Maximum UV Index Levels in Seiyo for July

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

Data source: Seiyo 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 Seiyo Compares to Other Months

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

This table compares monthly weather conditions in Seiyo, 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)	60 mm (2.4 inches)	74%	moderate
February Weather	5°C (41°F)	97 mm (3.8 inches)	70%	high
March Weather	9°C (49°F)	140 mm (5.5 inches)	70%	very high
April Weather	14°C (57°F)	140 mm (5.5 inches)	76%	very high
May Weather	18°C (65°F)	174 mm (6.8 inches)	82%	extreme
June Weather	22°C (71°F)	236 mm (9.3 inches)	86%	extreme
July Weather	25°C (78°F)	409 mm (16.1 inches)	91%	extreme
August Weather	27°C (80°F)	219 mm (8.6 inches)	88%	extreme
September Weather	23°C (74°F)	229 mm (9.0 inches)	85%	extreme
October Weather	18°C (64°F)	213 mm (8.4 inches)	82%	very high
November Weather	11°C (52°F)	62 mm (2.4 inches)	79%	high
December Weather	6°C (43°F)	69 mm (2.7 inches)	77%	moderate