nomadseason

December Weather in Hitachi, Japan

Last updated: August 23, 2025

In December, the average temperature in Hitachi, Japan hovers around 9°C (48°F), with a minimum of 1°C (35°F) and a maximum reaching up to 19°C (67°F). This month typically brings about 75 mm (3.0 in) of precipitation over 9 days, contributing to an average humidity of 77%.

December Temperature in Hitachi

In December in Hitachi, the average temperature is 9°C (48°F). The maximum can reach 19°C (67°F), and the minimum can be as low as 1°C (35°F). Be sure to pack layers and prepare for varying weather conditions during your travels.

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

The chart illustrates December temperature patterns in Hitachi, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Hitachi, December typically has an average temperature of 9°C (48°F), with highs reaching up to 19°C (67°F) and lows dropping to around 1°C (35°F).
JanFebMarAprMayJunJulAugSepOctNovDec434449556368747873665748
Data source: Temperature data for Hitachi 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 Hitachi

In Hitachi in December, the precipitation amount is 75 mm (3.0 in) distributed over 9 days.

December Precipitation Trends in Hitachi

The chart displays monthly precipitation patterns in Hitachi, 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 Hitachi, December typically receives around 75 mm (3.0 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec59491621331461381971291722529875
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

December Humidity in Hitachi

In Hitachi in December, humidity is 77%. With an average temperature of 9°C (48°F), this humidity feels like a damp embrace, making traveling a bit more challenging as the cool air combines with the moisture, often leaving you with a chill that seeps into your bones.

December Average Humidity in Hitachi

This chart illustrates the average monthly humidity levels in Hitachi, 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 Hitachi is approximately 77%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec76%75%72%73%80%87%93%90%84%80%77%77%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Hitachi

In Hitachi 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 Hitachi, you can check the information here.

Maximum UV Index Levels in Hitachi for December

The chart shows the monthly maximum UV Index (UVI) for Hitachi 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 Hitachi typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3579101111109753
Data source: Hitachi 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 Hitachi Compares to Other Months

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

This table compares monthly weather conditions in Hitachi, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather6°C (44°F)59 mm (2.3 inches)76%moderate
February Weather7°C (44°F)49 mm (1.9 inches)75%moderate
March Weather9°C (49°F)162 mm (6.4 inches)72%high
April Weather13°C (55°F)133 mm (5.2 inches)73%very high
May Weather17°C (63°F)146 mm (5.7 inches)80%very high
June Weather20°C (69°F)138 mm (5.4 inches)87%extreme
July Weather24°C (75°F)197 mm (7.7 inches)92%extreme
August Weather26°C (78°F)129 mm (5.1 inches)90%very high
September Weather23°C (74°F)172 mm (6.8 inches)84%very high
October Weather19°C (66°F)252 mm (9.9 inches)80%high
November Weather14°C (58°F)98 mm (3.8 inches)77%moderate
December Weather9°C (48°F)75 mm (3.0 inches)77%moderate

Compare Hitachi's Climate with Cities Worldwide