Climate Chart of Lucerne, Switzerland

Climate overview

Temperature

Monthly mean temperatures are lowest in January, at 2.0 °C, and highest in July, at 20.3 °C. These are averages for each month, not daytime highs or a promise of the temperature on a particular date; day-to-day conditions can differ from the monthly mean. Across the calendar-month means, the unweighted mean is 10.8 °C. It offers a compact overview of the figures, but should not be read as a day-weighted annual average.

Rain

Mean daily rainfall reaches its monthly high in July, at 5.45 mm/day; the corresponding low is February, at 1.89 mm/day. The values are daily averages, not monthly totals, and the lower mean does not mean every day in that month will be dry or indicate how often rain falls. The unweighted mean of the monthly daily-rainfall averages is 3.65 mm/day. Use it as a broad reference rather than a forecast for a specific day or a measure of rain frequency.

Sunshine

Mean daily sunshine is highest in June, at 11.50 hours/day, and lowest in December, at 4.47 hours/day. These averages can help frame expectations for outdoor daylight planning, but sunshine duration is not the same as day length and does not guarantee clear skies throughout a day. The unweighted mean across monthly sunshine averages is 8.00 hours/day per day, a broad summary rather than a daily forecast.

Snow

Mean daily snowfall is highest in January, at 8.74 mm/day. The unweighted mean of the monthly daily-snowfall averages is 2.90 mm/day. These amounts do not establish how many days have snow, how deep it becomes, whether snow cover persists, or whether conditions suit skiing.