Riihimäki Weather in September

September in Riihimäki brings moderate temperatures, with highs of 16°C (61°F) and nights dropping to 7°C (45°F). Expect some rainfall, with around 59 mm (2.3 in) typical for the month.

Rainfall in Riihimäki in September

The climate data from previous years indicates about 18 days of rain, averaging 59 mm (2.3 in) for the month. Rain falls on many days this month, but usually in relatively small amounts. A light waterproof is more useful than a heavy umbrella.

Temperature in Riihimäki in September

In September, expect moderate temperatures in Riihimäki, with highs of 16°C (61°F) and lows of 7°C (45°F) at night. Even when the weather is stable, mornings and evenings can still feel distinctly cool. With lows around 7°C (45°F), nights are cold. The upside is that cool, crisp nights are often the best for a deep sleep.

Sunshine in Riihimäki in September

The month brings about 151 hours of sunlight, offering a comfortable mix of sun and overcast.

If you prefer dry days with pleasant temperatures, June, July and August typically offer 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.