Altdorf Weather in September

Altdorf in September sees moderate temperatures, with highs around 15°C (59°F) and overnight lows of 5°C (41°F). With the rainy season in full effect, expect around 176 mm (6.9 in) of rainfall and regular showers throughout the month.

Rainfall in Altdorf in September

As part of the rainy season, Altdorf sees around 15 days of rain in September, with an average of 176 mm (6.9 in). Rain during the rainy season is significant rather than just light drizzle. Expect proper showers on most rainy days.

Temperature in Altdorf in September

Daytime temperatures in Altdorf reach 15°C (59°F) in September, dropping to 5°C (41°F) at night. A light jacket or extra layer can be useful, especially outside the warmest hours of the day. With overnight lows of 5°C (41°F), nights are cold. The cold air does make for deep, comfortable sleep if you have enough blankets.

Sunshine in Altdorf in September

With about 138 hours of sunshine, the area enjoys a nice balance of sun and rainy moments, creating a pleasant environment.

Wind Speed in Altdorf in September

Average wind conditions reach 2 m/s (4 knots) in September. This creates comfortable weather with light winds that gently move vegetation. Keep in mind this is an average. Daily conditions range from near-calm to more noticeable wind.

If your ideal day consists of dry skies and pleasant temperatures, September typically offers the best circumstances for Altdorf.