Last updated: August 23, 2025
In December, the average temperature in Hitachi-Naka, Japan is a brisk 7°C (45°F). Expect chilly nights with minimums dipping to -1°C (30°F), while daytime highs can reach a pleasant 18°C (65°F). Be prepared for some rain, as the area experiences about 63 mm (2.5 in) of precipitation over 7 days. With an average humidity of 77%, layering is key to staying comfortable throughout your visit!
In December in Hitachi-Naka, the average temperature is 7°C (45°F). Maximums can reach 18°C (65°F), and minimums can be as low as -1°C (30°F). It's a great time for travelers to enjoy the crisp weather while exploring the area, but be sure to pack layers to stay comfortable throughout the day.
In Hitachi-Naka in December, the precipitation amount is 63 mm (2.5 in) over a span of 7 days.
In Hitachi-Naka in December, humidity is 77%. With an average temperature of 7°C (45°F), this humidity feels like a damp chill that clings to your skin, making it important to dress in layers for comfort while exploring the area.
In Hitachi-Naka 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-Naka, you can check the information here.
UV Risk Categories
Weather in Hitachi-Naka varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Hitachi-Naka, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 5°C (40°F) | 48 mm (1.9 inches) | 76% | moderate |
| February Weather | 5°C (42°F) | 42 mm (1.6 inches) | 75% | moderate |
| March Weather | 9°C (48°F) | 148 mm (5.8 inches) | 72% | high |
| April Weather | 12°C (55°F) | 126 mm (5.0 inches) | 73% | very high |
| May Weather | 18°C (64°F) | 137 mm (5.4 inches) | 80% | very high |
| June Weather | 21°C (70°F) | 140 mm (5.5 inches) | 87% | extreme |
| July Weather | 24°C (76°F) | 215 mm (8.4 inches) | 92% | extreme |
| August Weather | 26°C (80°F) | 138 mm (5.4 inches) | 90% | very high |
| September Weather | 23°C (73°F) | 176 mm (6.9 inches) | 84% | very high |
| October Weather | 18°C (64°F) | 239 mm (9.4 inches) | 80% | high |
| November Weather | 13°C (55°F) | 80 mm (3.2 inches) | 77% | moderate |
| December Weather | 7°C (45°F) | 63 mm (2.5 inches) | 77% | moderate |