Last updated: August 23, 2025
In Nishi-Tokyo-shi, Japan, the average temperature in December hovers around 7°C (44°F), showcasing a tranquil climate. Expect lows of -4°C (25°F) and highs reaching a pleasant 22°C (71°F). During this period, precipitation totals about 55 mm (2.2 in) spread over 7 days, accompanied by an average humidity of 78%. Perfect for outdoor adventures—just don’t forget your umbrella!
In December in Nishi-Tokyo-shi, the average temperature is 7°C (44°F). Maximums can reach 22°C (71°F) and minimums can be as low as -4°C (25°F). This temperature range makes Nishi-Tokyo-shi an interesting destination for travelers seeking both crisp, cool days and the possibility of warmer sunshine.
In Nishi-Tokyo-shi in December, the precipitation amount is 55 mm (2.2 in) over the course of 7 days.
In Nishi-Tokyo-shi 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.
In Nishi-Tokyo-shi 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 Nishi-Tokyo-shi for better planning.
UV Risk Categories
Weather in Nishi-Tokyo-shi varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Nishi-Tokyo-shi, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 4°C (40°F) | 47 mm (1.8 inches) | 76% | moderate |
| February Weather | 6°C (42°F) | 50 mm (2.0 inches) | 74% | moderate |
| March Weather | 10°C (50°F) | 144 mm (5.7 inches) | 70% | very high |
| April Weather | 14°C (57°F) | 126 mm (5.0 inches) | 74% | very high |
| May Weather | 19°C (67°F) | 117 mm (4.6 inches) | 81% | extreme |
| June Weather | 22°C (72°F) | 168 mm (6.6 inches) | 88% | extreme |
| July Weather | 26°C (79°F) | 252 mm (9.9 inches) | 93% | extreme |
| August Weather | 28°C (82°F) | 133 mm (5.3 inches) | 90% | extreme |
| September Weather | 23°C (74°F) | 201 mm (7.9 inches) | 86% | very high |
| October Weather | 18°C (64°F) | 291 mm (11.4 inches) | 83% | high |
| November Weather | 12°C (55°F) | 69 mm (2.7 inches) | 80% | moderate |
| December Weather | 7°C (44°F) | 55 mm (2.2 inches) | 78% | moderate |