January Weather in Saikai, Japan

Last updated: August 23, 2025

In January, the average temperature in Saikai, Japan hovers around 8°C (47°F). Expect chilly days with minimum temperatures dropping to 0°C (32°F), while highs can reach up to 18°C (65°F). With 58 mm (2.3 in) of precipitation spread across 8 days, don't forget your umbrella! Additionally, the average humidity sits at a comfortable 73%, perfect for those cozy indoor moments.

January Temperature in Saikai

In January in Saikai, the average temperature is 8°C (47°F). Maximums can reach 18°C (65°F) and minimums can be as low as 0°C (32°F). This makes it a great time to explore the outdoors while layering your clothing for comfort.

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

The chart illustrates January 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, January typically has an average temperature of 8°C (47°F), with highs reaching up to 18°C (65°F) and lows dropping to around 0°C (32°F).

Data source: Temperature data for Saikai generated using information from the Copernicus Climate Change Service.

January Precipitation in Saikai

In Saikai in January, the precipitation amount is 58 mm (2.3 in) over a span of 8 days.

January Precipitation Trends in Saikai

The chart displays monthly precipitation patterns in Saikai, with values for each month alongside January’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how January’s conditions compare to those of other months. In Saikai, January typically receives around 58 mm (2.3 inches) of precipitation spread over approximately 8 days.

Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

January Humidity in Saikai

In Saikai in January humidity is 73%. With an average temperature of 8°C (47°F), this humidity feels like a chilly dampness that can make outdoor activities less enjoyable, wrapping you in a thick, misty embrace that weighs heavily on your clothes and skin, making travel seem a bit more cumbersome and less invigorating.

January Average Humidity in Saikai

This chart illustrates the average monthly humidity levels in Saikai, with January’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In January, average humidity in Saikai is approximately 73%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Saikai

In Saikai in January, 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 January

The chart shows the monthly maximum UV Index (UVI) for Saikai in January, 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 January, the maximum UV index in Saikai typically reaches 4, which falls under the moderate exposure category.

Data source: Saikai January 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 January 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 January’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 January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	8°C (47°F)	58 mm (2.3 inches)	73%	moderate
February Weather	9°C (48°F)	93 mm (3.6 inches)	69%	high
March Weather	12°C (54°F)	147 mm (5.8 inches)	71%	very high
April Weather	15°C (60°F)	130 mm (5.1 inches)	79%	very high
May Weather	19°C (67°F)	206 mm (8.1 inches)	87%	extreme
June Weather	23°C (73°F)	231 mm (9.1 inches)	91%	extreme
July Weather	26°C (79°F)	393 mm (15.5 inches)	97%	extreme
August Weather	28°C (82°F)	320 mm (12.6 inches)	94%	extreme
September Weather	25°C (77°F)	223 mm (8.8 inches)	84%	extreme
October Weather	21°C (69°F)	110 mm (4.3 inches)	79%	high
November Weather	16°C (60°F)	65 mm (2.6 inches)	75%	high
December Weather	10°C (51°F)	81 mm (3.2 inches)	72%	moderate