April Weather in Omachi, Japan

Last updated: August 23, 2025

In Omachi, Japan, the average temperature for April hovers around 4°C (39°F), with a minimum dipping to -11°C (12°F) and a maximum rising to 22°C (71°F). Prepare for the possibility of rain, as the area sees about 226 mm (8.9 in) of precipitation over 18 days. With an average humidity of 78%, be ready for that cozy, damp atmosphere that often accompanies the season.

April Temperature in Omachi

In April in Omachi, the average temperature is 4°C (39°F). The maximum can reach 22°C (71°F), while the minimum can drop as low as -11°C (12°F). This wide range of temperatures means that travelers should be prepared for both chilly conditions and warmer days, making layers essential for a comfortable experience.

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

The chart illustrates April temperature patterns in Omachi, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Omachi, April typically has an average temperature of 4°C (39°F), with highs reaching up to 22°C (71°F) and lows dropping to around -11°C (12°F).

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

April Precipitation in Omachi

In Omachi in April, the total precipitation amount is 226 mm (8.9 in) spread over 18 days.

April Precipitation Trends in Omachi

The chart displays monthly precipitation patterns in Omachi, 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 Omachi, April typically receives around 226 mm (8.9 inches) of precipitation spread over approximately 18 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 Omachi

In Omachi in April humidity is 78%. With an average temperature of 4°C (39°F), this humidity feels like a damp chill that seeps into your bones, making outdoor exploration somewhat uncomfortable and necessitating the need for warm, weatherproof clothing to fully enjoy your travels.

April Average Humidity in Omachi

This chart illustrates the average monthly humidity levels in Omachi, 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 Omachi is approximately 78%, 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 Omachi

In Omachi 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 Omachi.

Maximum UV Index Levels in Omachi for April

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

Data source: Omachi 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 Omachi Compares to Other Months

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

This table compares monthly weather conditions in Omachi, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-8°C (19°F)	193 mm (7.6 inches)	88%	moderate
February Weather	-7°C (20°F)	181 mm (7.1 inches)	86%	high
March Weather	-1°C (30°F)	198 mm (7.8 inches)	81%	very high
April Weather	4°C (39°F)	226 mm (8.9 inches)	78%	very high
May Weather	11°C (52°F)	276 mm (10.9 inches)	81%	extreme
June Weather	15°C (59°F)	310 mm (12.2 inches)	88%	extreme
July Weather	19°C (67°F)	565 mm (22.3 inches)	92%	extreme
August Weather	20°C (69°F)	400 mm (15.8 inches)	92%	extreme
September Weather	16°C (61°F)	334 mm (13.1 inches)	89%	very high
October Weather	10°C (50°F)	284 mm (11.2 inches)	87%	high
November Weather	3°C (37°F)	139 mm (5.5 inches)	85%	moderate
December Weather	-5°C (24°F)	206 mm (8.1 inches)	86%	moderate