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December Weather in Saikai, Japan

Last updated: August 23, 2025

In December, the average temperature in Saikai, Japan is a comfortable 10°C (51°F), with a minimum of 2°C (36°F) and a maximum reaching 22°C (71°F). Expect 81 mm (3.2 in) of precipitation over approximately 7 days, and a relatively high average humidity of 72%.

December Temperature in Saikai

In December in Saikai, the average temperature is 10°C (51°F). Maximums can reach 22°C (71°F), while minimums can drop as low as 2°C (36°F). This variation makes it a great time for travelers to enjoy mild weather while exploring the sights.

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

The chart illustrates December temperature patterns in Saikai, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Saikai, December typically has an average temperature of 10°C (51°F), with highs reaching up to 22°C (71°F) and lows dropping to around 2°C (36°F).
JanFebMarAprMayJunJulAugSepOctNovDec474754606773798277696051
Data source: Temperature data for Saikai 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 Saikai

In Saikai in December, the precipitation amount is 81 mm (3.2 in) over a period of 7 days.

December Precipitation Trends in Saikai

The chart displays monthly precipitation patterns in Saikai, 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 Saikai, December typically receives around 81 mm (3.2 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec58931471302062313933202231106581
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Saikai

In Saikai in December, humidity is 72%. With an average temperature of 10°C (51°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities less comfortable and requiring extra layers to stay warm while exploring.

December Average Humidity in Saikai

This chart illustrates the average monthly humidity levels in Saikai, 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 Saikai is approximately 72%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec73%69%71%79%87%92%97%94%84%79%75%72%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Saikai

In Saikai 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 Saikai for better planning.

Maximum UV Index Levels in Saikai for December

The chart shows the monthly maximum UV Index (UVI) for Saikai 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 Saikai typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec468101111121211764
Data source: Saikai 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 Saikai Compares to Other Months

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

This table compares monthly weather conditions in Saikai, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather8°C (47°F)58 mm (2.3 inches)73%moderate
February Weather9°C (48°F)93 mm (3.6 inches)69%high
March Weather12°C (54°F)147 mm (5.8 inches)71%very high
April Weather15°C (60°F)130 mm (5.1 inches)79%very high
May Weather19°C (67°F)206 mm (8.1 inches)87%extreme
June Weather23°C (73°F)231 mm (9.1 inches)91%extreme
July Weather26°C (79°F)393 mm (15.5 inches)97%extreme
August Weather28°C (82°F)320 mm (12.6 inches)94%extreme
September Weather25°C (77°F)223 mm (8.8 inches)84%extreme
October Weather21°C (69°F)110 mm (4.3 inches)79%high
November Weather16°C (60°F)65 mm (2.6 inches)75%high
December Weather10°C (51°F)81 mm (3.2 inches)72%moderate

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