Last updated: August 23, 2025
In December, the average temperature in Osaka-sayama, Japan hovers around 8°C (47°F), with a minimum dipping to -1°C (31°F) and a maximum reaching up to 22°C (73°F). Expect about 62 mm (2.5 in) of precipitation spread over 7 days, and be prepared for a relatively high humidity level of 83%.
In December in Osaka-sayama, the average temperature is 8°C (47°F). The maximum can reach 22°C (73°F), while the minimum can plummet to as low as -1°C (31°F). This diverse range of temperatures makes Osaka-sayama a great destination for travelers seeking both mild days and crisp nights.
In Osaka-sayama in December, the precipitation amount is 62 mm (2.5 in) over a period of 7 days.
In Osaka-sayama in December humidity is 83%. With an average temperature of 8°C (47°F), this humidity feels like a chilly dampness that clings to your skin, making travel uncomfortable and leaving you yearning for warmth and dryness as you explore.
In Osaka-sayama 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 Osaka-sayama for better planning.
UV Risk Categories
Weather in Osaka-sayama varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Osaka-sayama, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 6°C (42°F) | 53 mm (2.1 inches) | 82% | moderate |
| February Weather | 6°C (43°F) | 65 mm (2.6 inches) | 79% | high |
| March Weather | 10°C (51°F) | 110 mm (4.3 inches) | 74% | very high |
| April Weather | 15°C (59°F) | 122 mm (4.8 inches) | 76% | extreme |
| May Weather | 20°C (68°F) | 146 mm (5.7 inches) | 83% | extreme |
| June Weather | 23°C (74°F) | 166 mm (6.5 inches) | 87% | extreme |
| July Weather | 27°C (82°F) | 270 mm (10.6 inches) | 93% | extreme |
| August Weather | 29°C (85°F) | 160 mm (6.3 inches) | 91% | extreme |
| September Weather | 25°C (77°F) | 164 mm (6.5 inches) | 87% | very high |
| October Weather | 19°C (67°F) | 238 mm (9.4 inches) | 85% | high |
| November Weather | 13°C (56°F) | 48 mm (1.9 inches) | 83% | high |
| December Weather | 8°C (47°F) | 62 mm (2.5 inches) | 83% | moderate |