Bellevue Temperature by Month

Bellevue, Canton of Geneva, Switzerland has an average annual maximum temperature of 15°C (59°F), ranging from 6°C (43°F) in January to 25°C (77°F) in July. Below you'll find a full monthly breakdown and a comparison with cities worldwide.

Visitors to Bellevue can expect significant temperature changes throughout the year. Nighttime temperatures also vary widely, ranging from 14°C (57°F) in July to -2°C (28°F) in January.

The chart below illustrates the average maximum day and minimum night temperatures in Bellevue by month:

The coolest part of the day is typically between 4 AM and 6 AM, while 3 PM is usually the warmest, when solar heating is at its peak. July, the city's warmest month, averages 267 hours of sunshine.

The chart below shows the average temperature throughout the year:

Bellevue's average annual maximum temperature is 15°C (59°F). To put that in context, here's how it compares to a few well-known destinations:

Rome, Italy averages 20°C (68°F) annually, with reliably warm summers and comfortable winters.

Toronto, Canada averages 13°C (55°F) annually, with cold snowy winters balanced by genuinely warm summers.

Chicago, USA averages 15°C (59°F) annually, known for extreme seasonal swings, from bitterly cold winters to warm summers.

Adelaide, Australia averages 21°C (70°F) a year, with warm summers, mild winters, and relatively low rainfall year-round.

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 Bellevue, January is the coolest month, with average highs of 6°C (43°F) and humidity around 81%, considered very high. In July, the warmest month, temperatures average 25°C (77°F) with 65% humidity, conditions that feel 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 Bellevue's weather, including monthly rainfall, sunshine hours, and humidity, visit our Bellevue climate page.