American River Weather in September

September in American River brings moderate temperatures, with daytime highs of 16°C (61°F) and nights around 12°C (54°F). Expect around 50 mm (2 in) of rainfall during the month.

Rainfall in American River in September

Expect around 9 days of rain based on historical data, with 50 mm (2 in) average. Expect a fairly normal spread of rainfall this month, with no particular pattern of very heavy or very persistent showers.

Temperature in American River in September

September in American River brings typical temperatures with highs around 16°C (61°F) and lows of 12°C (54°F). This creates a mild day-to-night pattern that is generally easy to manage with the right clothing. With overnight lows of 12°C (54°F), evenings can feel noticeably cooler than the daytime. An extra layer is a good idea, though the cool air makes for a good night's sleep.

September in American River has its charm. However, if you're seeking pleasant, dry and sunny weather, our weather planner can help you explore other destinations in the world.