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December Weather in Tosa, Japan

Last updated: August 23, 2025

In December, the average temperature in Tosa, Japan is a cool 9°C (49°F). Be prepared for a range of temperatures, with a minimum dipping to 1°C (34°F) and a maximum reaching up to 21°C (71°F). Expect 80 mm (3.1 in) of precipitation spread over 7 days, contributing to an average humidity level of 77%.

December Temperature in Tosa

In December, in Tosa, the average temperature is 9°C (49°F). The maximum can reach 21°C (71°F), while the minimum can drop as low as 1°C (34°F). Overall, it's a great time to visit for those who enjoy mild temperatures and are prepared for cooler evenings.

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

The chart illustrates December temperature patterns in Tosa, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Tosa, December typically has an average temperature of 9°C (49°F), with highs reaching up to 21°C (71°F) and lows dropping to around 1°C (34°F).
JanFebMarAprMayJunJulAugSepOctNovDec454653596672798176685849
Data source: Temperature data for Tosa 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 Tosa

In Tosa in December, the precipitation amount is 80 mm (3.1 in) during a span of 7 days.

December Precipitation Trends in Tosa

The chart displays monthly precipitation patterns in Tosa, 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 Tosa, December typically receives around 80 mm (3.1 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec691001792032313155793373483378180
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Tosa

In Tosa in December humidity is 77%. With an average temperature of 9°C (49°F), this humidity feels like a damp chill that seeps into your bones, making outdoor explorations feel colder and more uncomfortable than the thermometer suggests.

December Average Humidity in Tosa

This chart illustrates the average monthly humidity levels in Tosa, 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 Tosa is approximately 77%, 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 December generated using information from the Copernicus Climate Change Service.

December UV Index in Tosa

In Tosa 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 Tosa for better planning.

Maximum UV Index Levels in Tosa for December

The chart shows the monthly maximum UV Index (UVI) for Tosa 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 Tosa typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec469111112121210764
Data source: Tosa 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 Tosa Compares to Other Months

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

This table compares monthly weather conditions in Tosa, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather7°C (45°F)69 mm (2.7 inches)74%moderate
February Weather8°C (46°F)100 mm (3.9 inches)70%high
March Weather12°C (53°F)179 mm (7.1 inches)70%very high
April Weather15°C (59°F)203 mm (8.0 inches)76%extreme
May Weather19°C (67°F)231 mm (9.1 inches)82%extreme
June Weather22°C (72°F)314 mm (12.4 inches)86%extreme
July Weather26°C (79°F)579 mm (22.8 inches)91%extreme
August Weather27°C (81°F)337 mm (13.3 inches)88%extreme
September Weather25°C (76°F)348 mm (13.7 inches)85%very high
October Weather20°C (68°F)337 mm (13.3 inches)82%high
November Weather14°C (58°F)81 mm (3.2 inches)79%high
December Weather9°C (49°F)80 mm (3.1 inches)77%moderate

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