Duncan Weather in September

September in Duncan brings very high temperatures, with highs of 30°C (86°F) and nights dropping to 17°C (63°F). Rainfall is on the higher side this month, averaging around 78 mm (3.1 in), so keep a rain jacket handy.

Rainfall in Duncan in September

Based on our climate data of the past 30 years, about 8 days of rain are anticipated, with 78 mm (3.1 in) on average. When it rains this month, it tends to come down fairly heavily. Showers can be substantial even if they don't last all day.

Temperature in Duncan in September

In September, Duncan gets very high temperatures, with highs of 30°C (86°F). Nights cool to around 17°C (63°F). Indoor breaks or shaded spots can make the warmer part of the day much more comfortable. With lows of 17°C (63°F), nights are cool. If you're out after dark, an extra layer will keep you comfortable. The cooler air at night is also great for getting a good rest.

For Duncan itself, April and October generally stand out with the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.