April Weather in Iyo, Japan

Last updated: August 23, 2025

In Iyo, Japan, the average temperature in April hovers around 14°C (57°F). Expect a range from a chilly 2°C (36°F) to a pleasant 24°C (75°F). During this time, you can anticipate approximately 135 mm (5.3 in) of precipitation over about 10 days, with an average humidity of 76%—perfect for cozy indoor activities or enjoying the refreshing outdoors!

April Temperature in Iyo

In April in Iyo, the average temperature is 14°C (57°F). Maximum temperatures can reach 24°C (75°F), while minimums can dip as low as 2°C (36°F). Travelers should pack layers to comfortably enjoy the varying temperatures throughout the day.

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

The chart illustrates April temperature patterns in Iyo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Iyo, April typically has an average temperature of 14°C (57°F), with highs reaching up to 24°C (75°F) and lows dropping to around 2°C (36°F).

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

April Precipitation in Iyo

In Iyo in April, the total precipitation amount is 135 mm (5.3 in) recorded over a span of 10 days.

April Precipitation Trends in Iyo

The chart displays monthly precipitation patterns in Iyo, 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 Iyo, April typically receives around 135 mm (5.3 inches) of precipitation spread over approximately 10 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

April Humidity in Iyo

In Iyo in April humidity is 76%. With an average temperature of 14°C (57°F), this humidity feels like a warm blanket wrapped around you, creating a heavy atmosphere that can make outdoor activities feel sluggish and stifling, urging travelers to seek shade and refreshment more frequently.

April Average Humidity in Iyo

This chart illustrates the average monthly humidity levels in Iyo, 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 Iyo is approximately 76%, 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 Iyo

In Iyo 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 Iyo.

Maximum UV Index Levels in Iyo for April

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

Data source: Iyo 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 Iyo Compares to Other Months

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

This table compares monthly weather conditions in Iyo, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	5°C (42°F)	60 mm (2.4 inches)	74%	moderate
February Weather	6°C (43°F)	90 mm (3.6 inches)	70%	high
March Weather	10°C (50°F)	129 mm (5.1 inches)	70%	very high
April Weather	14°C (57°F)	135 mm (5.3 inches)	76%	very high
May Weather	18°C (65°F)	153 mm (6.0 inches)	82%	extreme
June Weather	22°C (72°F)	215 mm (8.5 inches)	86%	extreme
July Weather	26°C (79°F)	374 mm (14.7 inches)	91%	extreme
August Weather	27°C (81°F)	197 mm (7.7 inches)	88%	extreme
September Weather	24°C (75°F)	212 mm (8.4 inches)	85%	extreme
October Weather	19°C (66°F)	204 mm (8.0 inches)	82%	very high
November Weather	13°C (55°F)	61 mm (2.4 inches)	79%	high
December Weather	8°C (46°F)	69 mm (2.7 inches)	77%	moderate