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December Weather in Tono, Japan

Last updated: August 23, 2025

In December, the average temperature in Tono, Japan hovers around 1°C (34°F), with a minimum dip to -9°C (17°F) and a maximum rise to 15°C (59°F). Expect a total precipitation of approximately 69 mm (2.7 in) spread over 14 days, contributing to an average humidity of 80%.

December Temperature in Tono

In December in Tono, the average temperature is 1°C (34°F), with maximums reaching up to 15°C (59°F) and minimums dipping as low as -9°C (17°F). Travelers should be prepared for chilly weather and pack accordingly for both warmer days and colder nights.

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

The chart illustrates December temperature patterns in Tono, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Tono, December typically has an average temperature of 1°C (34°F), with highs reaching up to 15°C (59°F) and lows dropping to around -9°C (17°F).
JanFebMarAprMayJunJulAugSepOctNovDec303139475864717366564434
Data source: Temperature data for Tono 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 Tono

In Tono in December, the precipitation amount is 69 mm (2.7 in) over the course of 14 days.

December Precipitation Trends in Tono

The chart displays monthly precipitation patterns in Tono, 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 Tono, December typically receives around 69 mm (2.7 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec47601141201151321821801381825369
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Tono

In Tono in December, humidity is 80%. With an average temperature of 1°C (34°F), this humidity feels like a damp chill that seeps through your layers, making outdoor activities uncomfortable and potentially discouraging for travelers.

December Average Humidity in Tono

This chart illustrates the average monthly humidity levels in Tono, 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 Tono is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec80%79%77%75%80%87%92%92%86%82%79%80%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Tono

In Tono 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 Tono, you can check the information here.

Maximum UV Index Levels in Tono for December

The chart shows the monthly maximum UV Index (UVI) for Tono 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 Tono typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec346891110109643
Data source: Tono 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 Tono Compares to Other Months

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

This table compares monthly weather conditions in Tono, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (30°F)47 mm (1.9 inches)80%moderate
February Weather0°C (31°F)60 mm (2.4 inches)79%moderate
March Weather4°C (39°F)114 mm (4.5 inches)77%high
April Weather8°C (47°F)120 mm (4.7 inches)75%very high
May Weather14°C (58°F)115 mm (4.5 inches)80%very high
June Weather18°C (64°F)132 mm (5.2 inches)87%extreme
July Weather22°C (71°F)182 mm (7.2 inches)92%very high
August Weather23°C (74°F)180 mm (7.1 inches)92%very high
September Weather19°C (67°F)138 mm (5.4 inches)86%very high
October Weather13°C (56°F)182 mm (7.2 inches)82%high
November Weather7°C (44°F)53 mm (2.1 inches)79%moderate
December Weather1°C (34°F)69 mm (2.7 inches)80%moderate

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