June Weather in Niihama, Japan

Last updated: August 23, 2025

In June, the average temperature in Niihama, Japan is a pleasant 22°C (71°F), with minimums dipping to 15°C (59°F) and maximums reaching up to 29°C (84°F). Be prepared for some rain, as 199 mm (7.8 in) of precipitation typically falls over 15 days. With an average humidity of 86%, you might want to carry an umbrella and stay hydrated!

June Temperature in Niihama

In June in Niihama, the average temperature is 22°C (71°F). The maximum can reach 29°C (84°F), and the minimum can be as low as 15°C (59°F). This pleasant weather makes it an ideal time for exploring and enjoying outdoor activities.

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

The chart illustrates June temperature patterns in Niihama, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Niihama, June typically has an average temperature of 22°C (71°F), with highs reaching up to 29°C (84°F) and lows dropping to around 15°C (59°F).

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

June Precipitation in Niihama

In Niihama in June, the precipitation amount reaches 199 mm (7.8 in) over a span of 15 days.

June Precipitation Trends in Niihama

The chart displays monthly precipitation patterns in Niihama, 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 Niihama, June typically receives around 199 mm (7.8 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 Niihama

In Niihama in June humidity is 86%. With an average temperature of 22°C (71°F), this humidity feels like a heavy blanket wrapping around you, making outdoor activities feel muggy and draining.

June Average Humidity in Niihama

This chart illustrates the average monthly humidity levels in Niihama, 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 Niihama is approximately 86%, 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 Niihama

In Niihama 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 Niihama.

Maximum UV Index Levels in Niihama for June

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

Data source: Niihama 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 Niihama Compares to Other Months

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

This table compares monthly weather conditions in Niihama, showing how June’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	5°C (42°F)	65 mm (2.6 inches)	74%	moderate
February Weather	6°C (43°F)	85 mm (3.4 inches)	70%	high
March Weather	9°C (49°F)	129 mm (5.1 inches)	70%	very high
April Weather	13°C (57°F)	142 mm (5.6 inches)	76%	very high
May Weather	18°C (65°F)	148 mm (5.8 inches)	82%	extreme
June Weather	22°C (71°F)	199 mm (7.8 inches)	86%	extreme
July Weather	26°C (79°F)	357 mm (14.1 inches)	91%	extreme
August Weather	27°C (82°F)	181 mm (7.1 inches)	88%	extreme
September Weather	24°C (75°F)	237 mm (9.3 inches)	85%	very high
October Weather	19°C (66°F)	253 mm (10.0 inches)	82%	high
November Weather	13°C (56°F)	69 mm (2.7 inches)	79%	high
December Weather	8°C (46°F)	80 mm (3.1 inches)	77%	moderate