Weather Prediction December 2025. Get the monthly weather forecast for chennai, tamil nadu, india, including daily high/low, historical averages, to help you plan ahead. So far, december 2025 in sydney is slightly warmer than the historical average by 0.9 °c.

So far, december 2025 in sydney is slightly warmer than the historical average by 0.9 °c. Explore comprehensive december 2025 weather forecasts for chennai, including daily high and low temperatures, precipitation risks, and monthly temperature trends.