Monthly climate averages for Lyss, Switzerland. Based on 10-year ERA5 reanalysis data.
Cfb Oceanic
Climate OverviewLyss, Switzerland in August has warm conditions, with highs averaging 25°C (77°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 105 mm across the month.
Expect around 11.4h of sunshine at the start of August, decreasing to 9.6h by the end.
The warmest days tend to fall around the 14th, averaging 26.8°C (80°F).
Compared to July, this month is about 0°C cooler with 3 fewer rainy days. Temperatures begin dropping heading into September.
Daily averages based on historical data (2016–2025)
Daytime temperatures around 25°C (77°F) are ideal for full-day outdoor exploration. Keep afternoons flexible as tropical showers are common — they typically clear within an hour.
Wet weather can spread across much of the day, so it is best to keep outdoor plans flexible.
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 | 15days (107 mm) Wet | 5.2h Fair | 84% Humid | 1.6 Low | Poor | View Details |
| February | 9°C / 0°C | 6°C / -3°C | 12days (73 mm) Wet | 6.6h Fair | 79% Humid | 2.3 Moderate | Poor | View Details |
| March | 11°C / 2°C | 9°C / -1°C | 13days (78 mm) Wet | 8.4h Good | 75% Muggy | 3.7 Moderate | Poor | View Details |
| April | 15°C / 5°C | 13°C / 3°C | 13days (85 mm) Wet | 10.3h Excellent | 72% Muggy | 5.1 High | Fair | View Details |
| May | 18°C / 9°C | 17°C / 8°C | 17days (134 mm) Wet | 10.4h Excellent | 76% Humid | 5.6 High | Good | View Details |
| June best | 23°C / 14°C | 24°C / 14°C | 15days (108 mm) Wet | 11.9h Excellent | 74% Muggy | 6.7 High | Excellent | View Details |
| July best | 25°C / 16°C | 26°C / 17°C | 15days (115 mm) Wet | 12.2h Excellent | 71% Muggy | 6.6 High | Excellent | View Details |
| August best | 25°C / 16°C | 26°C / 17°C | 12days (105 mm) Wet | 11.1h Excellent | 73% Muggy | 5.8 High | Excellent | View Details |
| September best | 21°C / 13°C | 20°C / 12°C | 11days (88 mm) Wet | 9.1h Good | 78% Humid | 4.4 Moderate | Excellent | View Details |
| October best | 16°C / 8°C | 15°C / 7°C | 12days (91 mm) Wet | 7.2h Good | 82% Humid | 2.9 Moderate | Good | View Details |
| November | 10°C / 3°C | 7°C / 1°C | 14days (99 mm) Wet | 5.6h Fair | 86% Very Muggy | 1.8 Low | Poor | View Details |
| December | 6°C / 0°C | 4°C / -3°C | 14days (102 mm) Wet | 4.7h Fair | 87% Very Muggy | 1.3 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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