Altdorf Weather in September

With daytime temperatures of 20°C (68°F) and nighttime lows of 11°C (52°F), September in Altdorf brings pleasant temperatures during the day. Do keep in mind that quite a bit of rainfall is typical. Around 82 mm (3.2 in) falls on average.

Rainfall in Altdorf in September

Based on our climate data of the past 30 years, about 12 days of rain are anticipated, with 82 mm (3.2 in) on average. Expect a fairly normal spread of rainfall this month, with no particular pattern of very heavy or very persistent showers.

Temperature in Altdorf in September

September is one of the better months to visit Altdorf. Expect 20°C (68°F) during the day and 11°C (52°F) at night. Even when the weather is stable, mornings and evenings can still feel distinctly cool. Nights cool down to 11°C (52°F), so a light jacket or extra layer is useful once the sun goes down. On the plus side, the cooler nights make for comfortable sleeping conditions.

Sunshine in Altdorf in September

With about 167 hours of sunshine, the area enjoys a nice balance of sun and overcast, creating a pleasant environment.

If you're inclined towards comfortable temperatures and drier conditions, September is a good time to visit Altdorf.