Altdorf Temperature by Month
Altdorf in Uri, Switzerland sees significant seasonal temperature differences, with daytime highs between -1°C (30°F) in January and 19°C (66°F) in July, averaging 9°C (48°F) annually. Explore the full monthly breakdown below.
Altdorf Monthly Temperatures
With significant temperature fluctuations, Altdorf enjoys distinct seasons year-round. Nighttime lows range from 9°C (48°F) in July to -8°C (18°F) in January.
The chart below illustrates the average maximum day and minimum night temperatures in Altdorf by month:
The minimum temperature is often recorded between 4 AM and 6 AM, while the highest temperature is usually reached at 3 PM, when the sun's heating effect is strongest. July, the warmest month, gets 168 hours of sunshine.
The chart below shows the average temperature throughout the year:
Temperature: Altdorf vs Switzerland
The map below shows the annual temperature across Switzerland. You can also select individual months if you want to compare a specific time of year.
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Altdorf vs World: Temperature Compared
Altdorf's average annual maximum temperature is 9°C (48°F). To put that in context, here's how it compares to a few well-known destinations:
Barcelona, Spain has an annual average of around 21°C (70°F), with warm summers and mild, fairly short winters.
Zermatt, Switzerland averages just 4°C (39°F) annually due to its altitude, with very cold winters and cool summers even at its warmest.
Chicago, USA averages 15°C (59°F) annually — known for extreme seasonal swings, from bitterly cold winters to warm summers.
Melbourne, Australia averages 20°C (68°F) annually — known for unpredictable weather, with four seasons sometimes happening in one day.
What Does the Temperature Feel Like in Altdorf?
Temperature alone doesn't tell the whole story — humidity plays a big role in how warm or cold it actually feels. High humidity in summer makes the heat feel more intense, particularly once temperatures climb above 25°C. In winter, the same humidity can make cold air feel sharper than the thermometer suggests.
In the cooler months, when temperatures drop below 10°C, high humidity makes the cold feel more cutting than it would in dry conditions.
In Altdorf, January is the coolest month, with average highs of -1°C (30°F) and humidity around 78% — considered high. For a full picture, see our humidity page.
Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.
The readings come from a range of sources — land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.
For cities and regions with significant elevation, altitude is one of the biggest factors shaping local temperatures. As a rule of thumb, temperatures fall by around 6°C for every 1,000 metres gained — so a city at 2,000 metres will typically be around 12°C cooler than a city at sea level in the same region. Higher ground also tends to see more dramatic day-to-night temperature swings, since thinner air loses heat faster after sunset.
For more on Altdorf's weather — including monthly rainfall, sunshine hours, and humidity — visit our Altdorf climate page.
