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December Weather in Tachiarai, Japan

Last updated: August 23, 2025

In December, the average temperature in Tachiarai, Japan hovers around 8°C (46°F). Expect a chilly minimum of -1°C (31°F), with highs reaching up to 23°C (73°F). This month typically sees around 68 mm (2.7 in) of precipitation spread over 8 days, contributing to a comfortable average humidity of 79%.

December Temperature in Tachiarai

In December in Tachiarai, the average temperature is 8°C (46°F). The maximum can reach 23°C (73°F) and the minimum can be as low as -1°C (31°F). Pack accordingly for a mix of cool days and warmer afternoons, perfect for outdoor activities and sightseeing.

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

The chart illustrates December temperature patterns in Tachiarai, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Tachiarai, December typically has an average temperature of 8°C (46°F), with highs reaching up to 23°C (73°F) and lows dropping to around -1°C (31°F).
JanFebMarAprMayJunJulAugSepOctNovDec434452596874808376665546
Data source: Temperature data for Tachiarai 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 Tachiarai

In Tachiarai in December, the precipitation amount is 68 mm (2.7 in) spread over 8 days.

December Precipitation Trends in Tachiarai

The chart displays monthly precipitation patterns in Tachiarai, 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 Tachiarai, December typically receives around 68 mm (2.7 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec58801211151631993673032061135268
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Tachiarai

In Tachiarai in December humidity is 79%. With an average temperature of 8°C (46°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities a bit less enjoyable and leading travelers to seek cozy, warm spots to regain their comfort.

December Average Humidity in Tachiarai

This chart illustrates the average monthly humidity levels in Tachiarai, 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 Tachiarai is approximately 79%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec75%71%71%78%84%86%92%91%84%83%81%79%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Tachiarai

In Tachiarai 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 Tachiarai for better planning.

Maximum UV Index Levels in Tachiarai for December

The chart shows the monthly maximum UV Index (UVI) for Tachiarai 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 Tachiarai typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec468111111121211764
Data source: Tachiarai 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 Tachiarai Compares to Other Months

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

This table compares monthly weather conditions in Tachiarai, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather6°C (43°F)58 mm (2.3 inches)75%moderate
February Weather7°C (45°F)80 mm (3.1 inches)71%high
March Weather11°C (52°F)121 mm (4.8 inches)71%very high
April Weather15°C (59°F)115 mm (4.5 inches)78%extreme
May Weather20°C (68°F)163 mm (6.4 inches)84%extreme
June Weather23°C (74°F)199 mm (7.8 inches)86%extreme
July Weather27°C (81°F)367 mm (14.4 inches)92%extreme
August Weather28°C (83°F)303 mm (11.9 inches)91%extreme
September Weather24°C (76°F)206 mm (8.1 inches)84%extreme
October Weather19°C (67°F)113 mm (4.5 inches)83%high
November Weather13°C (56°F)52 mm (2.1 inches)81%high
December Weather8°C (46°F)68 mm (2.7 inches)79%moderate

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