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December Weather in Saijo, Japan

Last updated: August 23, 2025

In Saijo, Japan, the average temperature in December hovers around 4°C (40°F), with a minimum dipping to -4°C (25°F) and a maximum reaching 18°C (65°F). Expect 89 mm (3.5 in) of precipitation spread over 16 days, accompanied by a notable average humidity of 82%. Prepare for a month that blends chilly mornings with the potential for damp afternoons!

December Temperature in Saijo

In December in Saijo, the average temperature is 4°C (40°F), with maximums reaching up to 18°C (65°F) and minimums dropping as low as -4°C (25°F). Be prepared for a mix of chilly days and milder weather, making it a varied time to explore Saijo.

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

The chart illustrates December temperature patterns in Saijo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Saijo, December typically has an average temperature of 4°C (40°F), with highs reaching up to 18°C (65°F) and lows dropping to around -4°C (25°F).
JanFebMarAprMayJunJulAugSepOctNovDec363745536368767870604939
Data source: Temperature data for Saijo 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 Saijo

In Saijo in December, the precipitation amount is 89 mm (3.5 in) over the course of 16 days.

December Precipitation Trends in Saijo

The chart displays monthly precipitation patterns in Saijo, 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 Saijo, December typically receives around 89 mm (3.5 inches) of precipitation spread over approximately 16 days.
JanFebMarAprMayJunJulAugSepOctNovDec73851291311191973592622341714489
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Saijo

In Saijo in December, humidity is 82%. With an average temperature of 4°C (40°F), this humidity feels like a chilly dampness that lingers in the air, making travel slightly uncomfortable as the cold penetrates through layers of clothing, often leaving you feeling chilled and clammy.

December Average Humidity in Saijo

This chart illustrates the average monthly humidity levels in Saijo, 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 Saijo is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%79%73%74%84%86%92%92%87%85%84%82%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Saijo

In Saijo 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 Saijo, you can check the information here.

Maximum UV Index Levels in Saijo for December

The chart shows the monthly maximum UV Index (UVI) for Saijo 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 Saijo typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec458111111121210753
Data source: Saijo 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 Saijo Compares to Other Months

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

This table compares monthly weather conditions in Saijo, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather2°C (36°F)73 mm (2.9 inches)82%moderate
February Weather3°C (37°F)85 mm (3.3 inches)79%moderate
March Weather7°C (45°F)129 mm (5.1 inches)73%very high
April Weather12°C (53°F)131 mm (5.2 inches)74%extreme
May Weather17°C (63°F)119 mm (4.7 inches)84%extreme
June Weather20°C (68°F)197 mm (7.7 inches)86%extreme
July Weather24°C (76°F)359 mm (14.1 inches)92%extreme
August Weather26°C (78°F)262 mm (10.3 inches)92%extreme
September Weather21°C (70°F)234 mm (9.2 inches)87%very high
October Weather16°C (60°F)171 mm (6.7 inches)85%high
November Weather9°C (49°F)44 mm (1.7 inches)84%moderate
December Weather4°C (40°F)89 mm (3.5 inches)82%moderate

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