nomadseason

December Weather in Otawara, Japan

Last updated: August 23, 2025

In Otawara, Japan, the average temperature in December hovers around 5°C (42°F). Expect a chilly minimum of -4°C (26°F), but it can rise to a pleasant maximum of 18°C (65°F). The month typically sees 53 mm (2.1 in) of precipitation over 7 days, accompanied by average humidity levels of 86%.

December Temperature in Otawara

In December in Otawara, the average temperature is 5°C (42°F). The maximum can reach 18°C (65°F), while the minimum can drop as low as -4°C (26°F). It's a great time to visit for those who enjoy mild weather and don't mind the possibility of chilly nights!

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

The chart illustrates December temperature patterns in Otawara, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Otawara, December typically has an average temperature of 5°C (42°F), with highs reaching up to 18°C (65°F) and lows dropping to around -4°C (26°F).
JanFebMarAprMayJunJulAugSepOctNovDec384046546470767971625142
Data source: Temperature data for Otawara generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Otawara

In Otawara in December, the total precipitation amount is 53 mm (2.1 in) spread over a period of 7 days.

December Precipitation Trends in Otawara

The chart displays monthly precipitation patterns in Otawara, 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 Otawara, December typically receives around 53 mm (2.1 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec40421351271421482551891762255653
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

December Humidity in Otawara

In Otawara in December, humidity is 86%. With an average temperature of 5°C (42°F), this humidity feels like a damp chill that penetrates your layers, making outdoor activities quite uncomfortable and prompting you to seek warmth indoors more often.

December Average Humidity in Otawara

This chart illustrates the average monthly humidity levels in Otawara, 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 Otawara is approximately 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%87%81%79%81%88%92%92%89%87%85%86%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Otawara

In Otawara in December, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Otawara, you can check the information here.

Maximum UV Index Levels in Otawara for December

The chart shows the monthly maximum UV Index (UVI) for Otawara 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 Otawara typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3579101111119753
Data source: Otawara 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 Otawara Compares to Other Months

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

This table compares monthly weather conditions in Otawara, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather3°C (38°F)40 mm (1.6 inches)88%moderate
February Weather4°C (40°F)42 mm (1.6 inches)86%moderate
March Weather8°C (47°F)134 mm (5.3 inches)81%high
April Weather12°C (55°F)127 mm (5.0 inches)78%very high
May Weather18°C (64°F)142 mm (5.6 inches)81%very high
June Weather21°C (70°F)148 mm (5.8 inches)88%extreme
July Weather25°C (76°F)255 mm (10.0 inches)92%extreme
August Weather26°C (80°F)189 mm (7.5 inches)92%extreme
September Weather22°C (72°F)176 mm (6.9 inches)89%very high
October Weather16°C (62°F)225 mm (8.9 inches)87%high
November Weather11°C (52°F)56 mm (2.2 inches)85%moderate
December Weather5°C (42°F)53 mm (2.1 inches)86%moderate

Compare Otawara's Climate with Cities Worldwide