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Hourly Forecast
Daylight Hours
06:55
Sunrise
19:15
Sunset
Moon
Waxing Crescent
11:56
Moonrise
20:41
Moonset
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Weather in Altdorf today, September 15, 2026
Expect reduced visibility in Altdorf on September 15, 2026 where fog patches form. Allow more time for morning journeys if the air stays thick.
Expect highs of 24°C and cooler readings close to 10°C. Relative humidity sits between 55% and 81%, reaching its peak around 23:00. Expect gentle winds, highest near 16:00 at 1.6 km/h.
The afternoon keeps an overcast feel, as cloud reaches about 100% around 22:00. Outdoor plans may still want a flexible backup. Expect visibility near 37.1 km, with poorer spells close to 32.6 km. Daylight runs from 06:55 to 19:15, lasting 12 hours 19 minutes of sunlight today.
The practical takeaway for Altdorf on September 15, 2026 is reduced clarity at times, so plan journeys with care near 24°C.
Frequently asked questions about weather in Altdorf
How warm does it get in Altdorf?
The warmest month in Altdorf is July, with average high temperatures of 25°C. The average temperature during this period is around 20°C.
How cold does it get in Altdorf?
The coldest month in Altdorf is January, with average low temperatures of -1°C. The average temperature during this period is around 1°C.
What is the wettest time of year in Altdorf?
The wettest month in Altdorf is May, with an average of 116mm of precipitation.
What is the driest time of year in Altdorf?
The driest month in Altdorf is March, with an average of 60mm of precipitation.
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