Climate averages 1991–2020
Luzern weather
in August.
A warm, very wet month: the 2nd warmest and the 11th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a warm month in Luzern: daytime highs average 23.0°C and nights cool to about 15.2°C. By daytime temperature it is the 2nd warmest of the 12 months.
Expect about 211 mm of rain on roughly 18 days, which makes August a very wet month (the 11th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 14 min on an average August day.
The nearest other city in this atlas is Zürich (40 km away). In August its highs average 23.2°C, about as warm as Luzern, with 147 mm of rain.
Among the 8 cities listed in Switzerland, Luzern ranks 5th of 8 for the warmest August highs and 8th of 8 for the driest August (rainfall, lowest first). The mean August high of those 8 cities is 22.9°C; Luzern is level with that mean.
From August to September, average highs fall by 4.0°C to 18.9°C, and monthly rainfall falls from 211 mm to 166 mm.
The annual picture
August in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Luzern climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 4.6°C-0.9°C | -0.9°C | 117 | 13.7 | 9.09 h |
| February | 5.7°C-1.2°C | -1.2°C | 112 | 12.8 | 10.210 h |
| March | 9.7°C1.2°C | 1.2°C | 126 | 15.1 | 11.912 h |
| April | 13.8°C3.9°C | 3.9°C | 135 | 15.2 | 13.614 h |
| May | 17.9°C8.1°C | 8.1°C | 188 | 18.4 | 15.015 h |
| June | 21.2°C12.1°C | 12.1°C | 200 | 18.6 | 15.816 h |
| July | 23.1°C14.5°C | 14.5°C | 212 | 18.5 | 15.515 h |
| August, selected | 23.0°C15.2°C | 15.2°C | 211 | 17.7 | 14.214 h |
| September | 18.9°C11.6°C | 11.6°C | 166 | 15.3 | 12.613 h |
| October | 14.9°C7.9°C | 7.9°C | 130 | 13.6 | 10.911 h |
| November | 9.0°C3.2°C | 3.2°C | 134 | 14.1 | 9.49 h |
| December | 5.3°C0.0°C | 0.0°C | 131 | 14.3 | 8.69 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
August in nearby cities
- Zürich in AugustSwitzerland · 40 kmHigh 23.2°C · Low 15.0°C · 147 mm rain
- Winterthur in AugustSwitzerland · 60 kmHigh 23.1°C · Low 14.6°C · 107 mm rain
- Bern in AugustSwitzerland · 66 kmHigh 21.8°C · Low 13.1°C · 101 mm rain
- Basel in AugustSwitzerland · 79 kmHigh 24.5°C · Low 14.9°C · 125 mm rain
- Sankt Gallen in AugustSwitzerland · 91 kmHigh 21.2°C · Low 12.7°C · 175 mm rain
- Vaduz in AugustLiechtenstein · 93 kmHigh 23.1°C · Low 13.9°C · 219 mm rain
- Konstanz in AugustGermany · 94 kmHigh 23.3°C · Low 16.8°C · 120 mm rain
- Mulhouse in AugustFrance · 107 kmHigh 24.3°C · Low 15.1°C · 80 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Luzern) is explained once on the Luzern year overview and on the Sources, method and limits page.