Traders see the highest temperature in Guangzhou on August 20 clustering around 35–36°C because official forecast models from agencies like the China Meteorological Administration currently project peak daytime readings in that narrow band amid typical late-summer subtropical conditions. High humidity, light winds, and urban heat retention support those levels, while scattered cloud cover and thunderstorm chances on the 19th–20th could cap extremes by limiting solar heating and introducing brief cooling. Recent model runs show minor disagreements on exact timing of any rain, creating the tight spread between 35°C and 36°C outcomes and slightly lower odds for 37°C or higher. Historical August averages near 33°C provide context, but short-term variability keeps probabilities fluid until updated guidance arrives closer to the date.