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December Weather in Izumi, Japan

Last updated: August 23, 2025

In December, the average temperature in Izumi, Japan hovers around 11°C (52°F). Expect a range that dips to a minimum of 3°C (38°F) and peaks at a comfortable 23°C (74°F). With 101 mm (4.0 in) of precipitation spread over 9 days, you might want to keep an umbrella handy. Meanwhile, the average humidity rests at a notable 74%, adding to the character of the season.

December Temperature in Izumi

In December in Izumi, the average temperature is 11°C (52°F). Maximums can reach 23°C (74°F), while minimums can drop as low as 3°C (38°F). This moderate climate makes Izumi an ideal destination for travelers looking to enjoy mild weather.

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

The chart illustrates December temperature patterns in Izumi, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Izumi, December typically has an average temperature of 11°C (52°F), with highs reaching up to 23°C (74°F) and lows dropping to around 3°C (38°F).
JanFebMarAprMayJunJulAugSepOctNovDec494955616874808379716152
Data source: Temperature data for Izumi 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 Izumi

In Izumi in December, the total precipitation amount is 101 mm (4.0 in), occurring over a span of 9 days.

December Precipitation Trends in Izumi

The chart displays monthly precipitation patterns in Izumi, 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 Izumi, December typically receives around 101 mm (4.0 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec64108163160250343454247261141114101
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Izumi

In Izumi in December, humidity is 74%. With an average temperature of 11°C (52°F), this humidity feels like a damp chill in the air, making travel outdoors feel heavier and more cumbersome, often leading to discomfort and a need for warmer clothing.

December Average Humidity in Izumi

This chart illustrates the average monthly humidity levels in Izumi, 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 Izumi is approximately 74%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec72%68%72%79%83%86%90%85%80%78%76%75%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Izumi

In Izumi 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 Izumi for better planning.

Maximum UV Index Levels in Izumi for December

The chart shows the monthly maximum UV Index (UVI) for Izumi 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 Izumi typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec569111212121311864
Data source: Izumi 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 Izumi Compares to Other Months

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

This table compares monthly weather conditions in Izumi, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather9°C (49°F)64 mm (2.5 inches)72%moderate
February Weather10°C (50°F)108 mm (4.3 inches)68%high
March Weather13°C (55°F)162 mm (6.4 inches)72%very high
April Weather16°C (61°F)160 mm (6.3 inches)79%extreme
May Weather20°C (68°F)250 mm (9.9 inches)83%extreme
June Weather23°C (74°F)343 mm (13.5 inches)86%extreme
July Weather27°C (81°F)454 mm (17.9 inches)90%extreme
August Weather28°C (83°F)247 mm (9.7 inches)85%extreme
September Weather26°C (79°F)261 mm (10.3 inches)80%extreme
October Weather22°C (71°F)141 mm (5.6 inches)78%very high
November Weather16°C (61°F)114 mm (4.5 inches)76%high
December Weather11°C (52°F)101 mm (4.0 inches)74%moderate

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