Hi, Mr. Anthony, I can give your exact answer to your question. Our weather report usually can predict the weather condition in the next ten days. Personally I believe, there is little reference valuse to see the weather report for the next 4-10 days. Just pay attention to the latest report in 1-3 days. The average temperature in Jan in Guangzhou is about 10 degrees. May have cold air flow, then it will drop below 10. Take this Guangzhou Weather(https://www.travelchinaguide.com/climate/guangzhou.htm) report for latest forecast.