Climate Chart of Geneva, Switzerland

Climate overview

Temperature

The monthly mean temperature is lowest in January, at 2.6 °C, and reaches its highest point in July, at 21.6 °C. These are averages for each whole month, not daytime maximum temperatures, so they describe the broad seasonal contrast rather than the range visitors might experience from day to day. Across the calendar months, the unweighted mean of the monthly temperature means is 11.5 °C. It is a useful compact reference for the dataset, but is not a day-weighted annual average.

Rain

Mean daily rainfall is lowest in February, at 2.51 mm/day, while the highest monthly mean occurs in May, at 4.74 mm/day. These daily averages are not monthly rainfall totals and cannot show how often rain falls or whether a particular day will be wet. The unweighted mean across the monthly daily-rainfall means is 3.29 mm/day. It offers an overall reference, not a promise of evenly distributed rainfall through the year.

Sunshine

Mean daily sunshine reaches its highest monthly value in July, at 12.11 hours/day, and its lowest in December, at 4.78 hours/day. These figures can help with broad outdoor-planning expectations, but sunshine duration is not the same as daylight length and does not guarantee clear skies on an individual day. The unweighted mean of the monthly sunshine-duration means is 8.53 hours/day per day, providing a summary across calendar months rather than a forecast for any particular date.

Snow

The highest monthly mean daily snowfall is recorded in January, at 8.56 mm/day; the unweighted mean across monthly snowfall means is 2.27 mm/day. These are average daily amounts, not monthly totals, and they do not establish the number of snowy days, snow depth, snow cover or skiing conditions.