April Weather in Iwaki, Japan

Last updated: August 23, 2025

In Iwaki, Japan, the average temperature in April hovers around 11°C (53°F). You can expect a minimum of 3°C (38°F) and a maximum of 21°C (70°F), offering a pleasant range for outdoor activities. However, be prepared for some rain, as precipitation reaches 136 mm (5.4 in) over about 12 days. With an average humidity of 73%, the air can feel quite moist—perfect for enjoying those cozy indoor moments!

April Temperature in Iwaki

In April in Iwaki, the average temperature is 11°C (53°F). The maximum can reach 21°C (70°F) and the minimum can be as low as 3°C (38°F). This mild climate makes it a pleasant time for travel, perfect for outdoor activities and exploring the local sights.

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

The chart illustrates April temperature patterns in Iwaki, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Iwaki, April typically has an average temperature of 11°C (53°F), with highs reaching up to 21°C (70°F) and lows dropping to around 3°C (38°F).

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

April Precipitation in Iwaki

In Iwaki in April, the total precipitation amount reaches 136 mm (5.4 in) over the course of 12 days.

April Precipitation Trends in Iwaki

The chart displays monthly precipitation patterns in Iwaki, 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 Iwaki, April typically receives around 136 mm (5.4 inches) of precipitation spread over approximately 12 days.

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

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Millimeters (mm) Inches (in)

April Humidity in Iwaki

In Iwaki in April humidity is 73%. With an average temperature of 11°C (53°F), this humidity feels like a damp chill that can make outdoor activities less enjoyable, so travelers should dress in layers to stay comfortable while exploring.

April Average Humidity in Iwaki

This chart illustrates the average monthly humidity levels in Iwaki, 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 Iwaki is approximately 73%, 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 Iwaki

In Iwaki in April, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Iwaki.

Maximum UV Index Levels in Iwaki for April

The chart shows the monthly maximum UV Index (UVI) for Iwaki 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 Iwaki typically reaches 9, which falls under the very high exposure category.

Data source: Iwaki 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 Iwaki Compares to Other Months

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

This table compares monthly weather conditions in Iwaki, 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)	57 mm (2.2 inches)	76%	moderate
February Weather	6°C (42°F)	45 mm (1.8 inches)	75%	moderate
March Weather	8°C (47°F)	169 mm (6.6 inches)	72%	high
April Weather	11°C (53°F)	136 mm (5.4 inches)	73%	very high
May Weather	16°C (61°F)	154 mm (6.1 inches)	80%	very high
June Weather	19°C (66°F)	136 mm (5.3 inches)	87%	very high
July Weather	22°C (72°F)	202 mm (8.0 inches)	92%	extreme
August Weather	25°C (76°F)	137 mm (5.4 inches)	90%	extreme
September Weather	22°C (72°F)	186 mm (7.3 inches)	84%	very high
October Weather	18°C (64°F)	271 mm (10.7 inches)	80%	high
November Weather	13°C (55°F)	85 mm (3.4 inches)	77%	moderate
December Weather	8°C (46°F)	73 mm (2.9 inches)	77%	moderate