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April Weather in Nagaoka, Japan

Last updated: August 23, 2025

In Nagaoka, Japan, the average temperature in April hovers around 12°C (53°F). Expect minimums to dip to -1°C (30°F) and maximums reaching up to 27°C (80°F). Be prepared for a fair amount of precipitation, totaling 114 mm (4.5 in) over 14 days, and keep in mind the average humidity is a notable 78%.

April Temperature in Nagaoka

In April in Nagaoka, the average temperature is 12°C (53°F). The maximum can reach 27°C (80°F), while the minimum can drop as low as -1°C (30°F). This variety in temperatures makes Nagaoka an ideal destination for travelers seeking both mild and crisp weather experiences.

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

The chart illustrates April temperature patterns in Nagaoka, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Nagaoka, April typically has an average temperature of 12°C (53°F), with highs reaching up to 27°C (80°F) and lows dropping to around -1°C (30°F).
JanFebMarAprMayJunJulAugSepOctNovDec363745536471798173625141
Data source: Temperature data for Nagaoka 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 Nagaoka

In Nagaoka in April, the total precipitation amount is 114 mm (4.5 in) over the course of 14 days.

April Precipitation Trends in Nagaoka

The chart displays monthly precipitation patterns in Nagaoka, 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 Nagaoka, April typically receives around 114 mm (4.5 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec165138130114110108283186151158139204
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in Nagaoka

In Nagaoka in April, humidity is 78%. With an average temperature of 12°C (53°F), this humidity feels like a damp chill that lingers in the air, making it essential to wear layers while exploring the sights, as the cool moisture can seep into your bones and leave you feeling a bit uncomfortable if not properly dressed for the weather.

April Average Humidity in Nagaoka

This chart illustrates the average monthly humidity levels in Nagaoka, 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 Nagaoka is approximately 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%87%81%79%81%88%92%92%89%87%85%86%
Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in Nagaoka

In Nagaoka 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 Nagaoka.

Maximum UV Index Levels in Nagaoka for April

The chart shows the monthly maximum UV Index (UVI) for Nagaoka 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 Nagaoka typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3479101011119643
Data source: Nagaoka 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 Nagaoka Compares to Other Months

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

This table compares monthly weather conditions in Nagaoka, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather2°C (37°F)165 mm (6.5 inches)88%moderate
February Weather3°C (38°F)138 mm (5.4 inches)86%moderate
March Weather7°C (45°F)130 mm (5.1 inches)81%high
April Weather12°C (53°F)114 mm (4.5 inches)78%very high
May Weather18°C (64°F)110 mm (4.3 inches)81%very high
June Weather21°C (71°F)108 mm (4.3 inches)88%very high
July Weather26°C (79°F)283 mm (11.2 inches)92%extreme
August Weather27°C (82°F)186 mm (7.3 inches)92%extreme
September Weather23°C (73°F)151 mm (5.9 inches)89%very high
October Weather17°C (63°F)158 mm (6.2 inches)87%high
November Weather11°C (52°F)139 mm (5.5 inches)85%moderate
December Weather5°C (41°F)204 mm (8.0 inches)86%moderate

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