Last updated: March 2, 2024
The weather in Sydney, Australia, during December is characterized by an average temperature of 21°C (70°F). Highs can soar to 29°C (85°F), while lows may dip to 16°C (61°F). Typically, the humidity level in Sydney throughout December hovers around 68%.
Minimum temperature
Average temperature
Maximum temperature
Humidity
In December, Sydney averages 78 mm (3.1 inches) of rainfall, typically over the course of 11 rainy days. The month enjoys an average of 14 hours 20 minutes of daylight, with the sun shining for approximately 10 hours 18 minutes each day. Additionally, there is a 42% probability of sunny days during this period.
Precipitation
Rainy days
Sunshine hours
Chance of sun
In December, the UV Index in Sydney reaches a maximum of 14, indicating a level of Extreme exposure. The most intense UV radiation typically occurs between 12:00 and 14:00, during which unprotected skin may burn in as little as 10 minutes.
| 07:00 | 08:00 | 09:00 | 10:00 | 11:00 | 12:00 | 13:00 | 14:00 | 15:00 | 16:00 | 17:00 | 18:00 | 19:00 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UVI | 1 | 3 | 5 | 8 | 12 | 14 | 14 | 13 | 10 | 7 | 4 | 2 | 1 |
| Exposure | Low | Moderate | VeryHigh | Extreme | VeryHigh | High | Moderate | Low | |||||
| Time to burn | 45 min | 30 min | 15 min | 10 min | 15 min | 25 min | 30 min | 45 min | |||||