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April Weather in Niihama, Japan

Last updated: August 23, 2025

In April, the average temperature in Niihama, Japan is a mild 13°C (57°F), with minimums dropping to 3°C (38°F) and maximums reaching up to 22°C (73°F). Expect 142 mm (5.6 in) of precipitation spread over 10 days, contributing to an average humidity level of 76%.

April Temperature in Niihama

In April in Niihama, the average temperature is 13°C (57°F). Maximum temperatures can reach 22°C (73°F), while minimums can drop as low as 3°C (38°F). This month offers a pleasant climate, making it an ideal time for travelers to explore the beauty of Niihama.

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

The chart illustrates April 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, April typically has an average temperature of 13°C (57°F), with highs reaching up to 22°C (73°F) and lows dropping to around 3°C (38°F).
JanFebMarAprMayJunJulAugSepOctNovDec424249566571788175665546
Data source: Temperature data for Niihama generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

April Precipitation in Niihama

In Niihama in April, the total precipitation amount is 142 mm (5.6 in) over the course of 10 days.

April Precipitation Trends in Niihama

The chart displays monthly precipitation patterns in Niihama, 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 Niihama, April typically receives around 142 mm (5.6 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec65851291421481993571812372536980
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in Niihama

In Niihama in April humidity is 76%. With an average temperature of 13°C (57°F), this humidity feels like a damp chill wrapping around you, making travel uncomfortable and prompting a constant need for a light jacket as you navigate through the misty atmosphere.

April Average Humidity in Niihama

This chart illustrates the average monthly humidity levels in Niihama, 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 Niihama is approximately 76%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec74%70%70%76%83%86%91%88%85%82%79%77%
Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in Niihama

In Niihama 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 Niihama.

Maximum UV Index Levels in Niihama for April

The chart shows the monthly maximum UV Index (UVI) for Niihama 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 Niihama typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec468101111121210764
Data source: Niihama 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 Niihama Compares to Other Months

Weather in Niihama varies notably across the year, with each month offering distinct climate conditions. This page compares April’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 April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (42°F)65 mm (2.6 inches)74%moderate
February Weather6°C (43°F)85 mm (3.4 inches)70%high
March Weather9°C (49°F)129 mm (5.1 inches)70%very high
April Weather13°C (57°F)142 mm (5.6 inches)76%very high
May Weather18°C (65°F)148 mm (5.8 inches)82%extreme
June Weather22°C (71°F)199 mm (7.8 inches)86%extreme
July Weather26°C (79°F)357 mm (14.1 inches)91%extreme
August Weather27°C (82°F)181 mm (7.1 inches)88%extreme
September Weather24°C (75°F)237 mm (9.3 inches)85%very high
October Weather19°C (66°F)253 mm (10.0 inches)82%high
November Weather13°C (56°F)69 mm (2.7 inches)79%high
December Weather8°C (46°F)80 mm (3.1 inches)77%moderate

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