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December Weather in Nagatoro, Japan

Last updated: August 23, 2025

In December, the average temperature in Nagatoro, Japan hovers around 5°C (40°F), with temperatures ranging from a chilly -4°C (24°F) to a mild 19°C (67°F). Be prepared for 57 mm (2.2 in) of precipitation spread across 8 days, and expect the air to feel quite damp, with an average humidity of 78%.

December Temperature in Nagatoro

In December in Nagatoro, the average temperature is 5°C (40°F). The maximum can reach 19°C (67°F) and the minimum can be as low as -4°C (24°F). Pack accordingly for chilly weather, but be prepared for a pleasant daytime warmth during your travels.

December Weather in Nagatoro: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Nagatoro, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Nagatoro, December typically has an average temperature of 5°C (40°F), with highs reaching up to 19°C (67°F) and lows dropping to around -4°C (24°F).
JanFebMarAprMayJunJulAugSepOctNovDec363845526266737668594940
Data source: Temperature data for Nagatoro 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.

December Precipitation in Nagatoro

In Nagatoro in December, the precipitation amount is 57 mm (2.2 in) over the course of 8 days.

December Precipitation Trends in Nagatoro

The chart displays monthly precipitation patterns in Nagatoro, with values for each month alongside December’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December’s conditions compare to those of other months. In Nagatoro, December typically receives around 57 mm (2.2 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec55591521581862453772422853595957
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Nagatoro

In Nagatoro in December humidity is 78%. With an average temperature of 5°C (40°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities less enjoyable and requiring extra layers to stay warm while you explore.

December Average Humidity in Nagatoro

This chart illustrates the average monthly humidity levels in Nagatoro, with December’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In December, average humidity in Nagatoro is approximately 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec76%74%70%74%82%88%93%90%86%83%80%78%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Nagatoro

In Nagatoro in December, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Nagatoro for better planning.

Maximum UV Index Levels in Nagatoro for December

The chart shows the monthly maximum UV Index (UVI) for Nagatoro in December, 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 December, the maximum UV index in Nagatoro typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec468101111121110754
Data source: Nagatoro December 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 December Weather in Nagatoro Compares to Other Months

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

This table compares monthly weather conditions in Nagatoro, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather2°C (36°F)55 mm (2.2 inches)76%moderate
February Weather3°C (38°F)59 mm (2.3 inches)74%high
March Weather7°C (45°F)152 mm (6.0 inches)70%very high
April Weather11°C (52°F)158 mm (6.2 inches)74%very high
May Weather16°C (62°F)186 mm (7.3 inches)81%extreme
June Weather19°C (67°F)245 mm (9.7 inches)88%extreme
July Weather23°C (74°F)377 mm (14.8 inches)93%extreme
August Weather25°C (77°F)242 mm (9.5 inches)90%extreme
September Weather20°C (69°F)285 mm (11.2 inches)86%very high
October Weather15°C (59°F)359 mm (14.1 inches)83%high
November Weather10°C (49°F)59 mm (2.3 inches)80%moderate
December Weather5°C (40°F)57 mm (2.2 inches)78%moderate

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