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December Weather in Agano, Japan

Last updated: August 23, 2025

In Agano, Japan, the average temperature in December hovers around 3°C (38°F), with lows dipping to -7°C (19°F) and highs reaching up to 19°C (67°F). Expect significant rainfall, with an average precipitation of 224 mm (8.8 in) spread over 26 days, contributing to an average humidity of 86%. Prepare for a cool and wet month!

December Temperature in Agano

In December in Agano, the average temperature is 3°C (38°F). The maximum can reach 19°C (67°F), while the minimum can drop to a chilly -7°C (19°F). Travelers should be prepared for a wide range of temperatures, ensuring they pack layers to stay comfortable.

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

The chart illustrates December temperature patterns in Agano, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Agano, December typically has an average temperature of 3°C (38°F), with highs reaching up to 19°C (67°F) and lows dropping to around -7°C (19°F).
JanFebMarAprMayJunJulAugSepOctNovDec333441506268767970594837
Data source: Temperature data for Agano 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 Agano

In Agano in December, the precipitation amount is 224 mm (8.8 in) spread over 26 days.

December Precipitation Trends in Agano

The chart displays monthly precipitation patterns in Agano, 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 Agano, December typically receives around 224 mm (8.8 inches) of precipitation spread over approximately 26 days.
JanFebMarAprMayJunJulAugSepOctNovDec184169163152154169353280181186161224
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Agano

In Agano in December humidity is 86%. With an average temperature of 3°C (38°F), this humidity feels like a damp chill that seeps through your layers, making traveling uncomfortable as breath clouds visibly in the crisp air.

December Average Humidity in Agano

This chart illustrates the average monthly humidity levels in Agano, 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 Agano is approximately 86%, 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 December generated using information from the Copernicus Climate Change Service.

December UV Index in Agano

In Agano in December, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Agano, you can check the information here.

Maximum UV Index Levels in Agano for December

The chart shows the monthly maximum UV Index (UVI) for Agano 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 Agano typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3579101111119653
Data source: Agano 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 Agano Compares to Other Months

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

This table compares monthly weather conditions in Agano, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather1°C (33°F)184 mm (7.2 inches)88%moderate
February Weather1°C (34°F)169 mm (6.6 inches)86%moderate
March Weather5°C (42°F)163 mm (6.4 inches)81%high
April Weather10°C (51°F)152 mm (6.0 inches)78%very high
May Weather17°C (62°F)154 mm (6.1 inches)81%very high
June Weather20°C (68°F)169 mm (6.6 inches)88%extreme
July Weather25°C (77°F)353 mm (13.9 inches)92%extreme
August Weather26°C (79°F)280 mm (11.0 inches)92%extreme
September Weather21°C (71°F)180 mm (7.1 inches)89%very high
October Weather15°C (60°F)186 mm (7.3 inches)87%high
November Weather9°C (49°F)161 mm (6.3 inches)85%moderate
December Weather3°C (38°F)224 mm (8.8 inches)86%moderate

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