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December Weather in Isehara, Japan

Last updated: August 23, 2025

In December, the average temperature in Isehara, Japan hovers around 7°C (44°F), with a minimum dropping to a brisk -4°C (25°F) and a maximum peaking at a mild 21°C (71°F). Expect 68 mm (2.7 in) of precipitation spread over approximately 9 days, contributing to an average humidity of 78%. Plan accordingly for this varied weather!

December Temperature in Isehara

In December in Isehara, the average temperature is 7°C (44°F). The maximum can reach 21°C (71°F), and the minimum can be as low as -4°C (25°F). Be prepared for a broad range of temperatures during your travels!

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

The chart illustrates December temperature patterns in Isehara, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Isehara, December typically has an average temperature of 7°C (44°F), with highs reaching up to 21°C (71°F) and lows dropping to around -4°C (25°F).
JanFebMarAprMayJunJulAugSepOctNovDec394148556470778072635444
Data source: Temperature data for Isehara 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 Isehara

In Isehara in December, the precipitation amount is 68 mm (2.7 in) spread over 9 days.

December Precipitation Trends in Isehara

The chart displays monthly precipitation patterns in Isehara, 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 Isehara, December typically receives around 68 mm (2.7 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec57661771481401982771572213178468
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Isehara

In Isehara in December, humidity is 78%. With an average temperature of 7°C (44°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities less enjoyable and prompting travelers to seek cozy indoor spaces or warm beverages for comfort.

December Average Humidity in Isehara

This chart illustrates the average monthly humidity levels in Isehara, 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 Isehara is approximately 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec76%74%70%74%82%88%93%90%86%83%80%78%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Isehara

In Isehara 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 Isehara for better planning.

Maximum UV Index Levels in Isehara for December

The chart shows the monthly maximum UV Index (UVI) for Isehara 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 Isehara typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec46891111111110754
Data source: Isehara 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 Isehara Compares to Other Months

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

This table compares monthly weather conditions in Isehara, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather4°C (39°F)57 mm (2.2 inches)76%moderate
February Weather5°C (41°F)66 mm (2.6 inches)74%high
March Weather9°C (48°F)177 mm (7.0 inches)70%very high
April Weather13°C (56°F)148 mm (5.8 inches)74%very high
May Weather18°C (65°F)140 mm (5.5 inches)81%extreme
June Weather21°C (70°F)198 mm (7.8 inches)88%extreme
July Weather25°C (77°F)277 mm (10.9 inches)93%extreme
August Weather27°C (80°F)157 mm (6.2 inches)90%extreme
September Weather22°C (73°F)221 mm (8.7 inches)86%very high
October Weather17°C (63°F)317 mm (12.5 inches)83%high
November Weather12°C (54°F)84 mm (3.3 inches)80%moderate
December Weather7°C (44°F)68 mm (2.7 inches)78%moderate

Compare Isehara's Climate with Cities Worldwide