Monthly climate averages for Lancy, Switzerland. Based on 10-year ERA5 reanalysis data.
Cfb Oceanic
Climate OverviewLancy, Switzerland in August has warm conditions, with highs averaging 25.4°C (78°F). Rain falls on about 12 days this month.
This month falls at the end of Summer.
Temperatures remain fairly steady throughout August, with daily highs around 24°C (75°F).
August sees fairly even rainfall, totalling about 103 mm across the month.
Expect around 11.5h of sunshine at the start of August, decreasing to 10.4h by the end.
The warmest days tend to fall around the 13th, averaging 27.1°C (81°F).
Temperatures begin dropping heading into September.
Daily averages based on historical data (2016–2025)
Daytime temperatures around 25°C (78°F) are ideal for full-day outdoor exploration. Keep afternoons flexible as tropical showers are common — they typically clear within an hour.
Rain usually comes in shorter passing showers rather than all-day rain.
1 of the last 5 yearly records were warmer than this month's long-run average.
| Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 5°C / -1°C | 2°C / -4°C | 14days (157 mm) Wet | 5.2h Fair | 81% Humid | 1.6 Low | Poor | View Details |
| February | 9°C / 1°C | 6°C / -2°C | 11days (99 mm) Wet | 6.7h Fair | 78% Humid | 2.4 Moderate | Poor | View Details |
| March | 12°C / 2°C | 9°C / -1°C | 13days (125 mm) Wet | 8.4h Good | 75% Muggy | 3.9 Moderate | Poor | View Details |
| April | 15°C / 6°C | 14°C / 3°C | 12days (105 mm) Wet | 10.2h Excellent | 70% Muggy | 5.4 High | Fair | View Details |
| May | 18°C / 9°C | 18°C / 8°C | 16days (159 mm) Wet | 10.5h Excellent | 75% Muggy | 5.8 High | Fair | View Details |
| June best | 23°C / 15°C | 25°C / 15°C | 16days (148 mm) Wet | 11.9h Excellent | 74% Muggy | 6.8 High | Excellent | View Details |
| July best | 25°C / 16°C | 27°C / 17°C | 13days (120 mm) Wet | 12.3h Excellent | 70% Muggy | 6.8 High | Excellent | View Details |
| August best | 25°C / 16°C | 27°C / 17°C | 12days (103 mm) Wet | 11.4h Excellent | 70% Muggy | 6.1 High | Excellent | View Details |
| September best | 21°C / 12°C | 21°C / 12°C | 12days (128 mm) Wet | 9.3h Good | 77% Humid | 4.5 Moderate | Excellent | View Details |
| October | 17°C / 8°C | 16°C / 6°C | 12days (141 mm) Wet | 7.4h Good | 81% Humid | 3 Moderate | Fair | View Details |
| November | 10°C / 3°C | 8°C / 0°C | 14days (147 mm) Wet | 5.6h Fair | 84% Humid | 1.8 Low | Poor | View Details |
| December | 7°C / 0°C | 4°C / -3°C | 14days (168 mm) Wet | 4.8h Fair | 84% Humid | 1.4 Low | Poor | View Details |
Summer clothing like shorts, t-shirts, and sundresses will be comfortable. Bring a light cardigan for air-conditioned spaces.
A waterproof jacket or compact umbrella is recommended for occasional showers.
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