Last updated: August 23, 2025
In December, the average temperature in Shinjo, Japan hovers around 2°C (35°F), with minimums dipping as low as -7°C (19°F) and maximums reaching up to 15°C (59°F). Expect 175 mm (6.9 in) of precipitation spread over 25 days, contributing to an average humidity of 80%. Don’t forget your umbrella!
In December in Shinjo, the average temperature is 2°C (35°F), with maximums reaching 15°C (59°F) and minimums dropping as low as -7°C (19°F). Travelers should be prepared for a chilly climate, layering their clothing to stay comfortable during the colder days and evenings.
In Shinjo in December, the precipitation amount reaches 175 mm (6.9 in) over the course of 25 days.
In Shinjo in December humidity is 80%. With an average temperature of 2°C (35°F), this humidity feels like a heavy, damp chill that clings to your skin, making outdoor excursions uncomfortable and your clothes feel soggy, while constantly reminding you to seek shelter indoors to escape the oppressive moisture in the air.
In Shinjo 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 Shinjo, you can check the information here.
UV Risk Categories
Weather in Shinjo varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Shinjo, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -1°C (31°F) | 138 mm (5.5 inches) | 80% | moderate |
| February Weather | 0°C (32°F) | 131 mm (5.1 inches) | 79% | moderate |
| March Weather | 4°C (40°F) | 131 mm (5.2 inches) | 77% | high |
| April Weather | 9°C (48°F) | 128 mm (5.1 inches) | 75% | very high |
| May Weather | 15°C (60°F) | 111 mm (4.4 inches) | 80% | very high |
| June Weather | 19°C (66°F) | 122 mm (4.8 inches) | 87% | very high |
| July Weather | 23°C (74°F) | 228 mm (9.0 inches) | 92% | extreme |
| August Weather | 24°C (76°F) | 208 mm (8.2 inches) | 92% | extreme |
| September Weather | 20°C (68°F) | 125 mm (4.9 inches) | 86% | very high |
| October Weather | 14°C (57°F) | 153 mm (6.0 inches) | 82% | high |
| November Weather | 8°C (47°F) | 112 mm (4.4 inches) | 79% | moderate |
| December Weather | 2°C (35°F) | 175 mm (6.9 inches) | 80% | moderate |