Weather in Basel in August 2025
Average weather
Average temperature in Basel in August
Going from a maximum of +37°C during the day to a minimum of +11°C during the night, the temperature in August averages around +27°C.
The average maximum temperature goes down 4% by the end of the month, compared with the beginning of the month, from +22°C to +21°C.
Is Basel warm or cold in August?
Basel is typically warm in August.
Maximum temperatures go down compared to the previous month from +26°C to +25°C. The minimum temperature also goes up from +15°C to +15°C.
It’s generally warm, but pack a long-sleeve shirt for evenings.
August is one of the warmest months in Basel, here is the comparison with other months:
Climate in Basel in August
| July | August | September | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +26°C | +25°C | +21°C | ||||
| Min. temperature | ||||||
| +6°C | +6°C | +2°C | ||||
| Max. temperature | ||||||
| +38°C | +39°C | +32°C | ||||
| Rainfall | ||||||
| 121 mm | 120 mm | 86 mm | ||||
| Wind | ||||||
| 2 m/s | 1 m/s | 1 m/s | ||||
| Humidity | ||||||
| 69% | 72% | 77% | ||||
| Air pressure | ||||||
| 1016 HPa | 1016 HPa | 1017 HPa | ||||
| Sunny days | ||||||
| 7 | 7 | 6 | ||||
| Cloudy days | ||||||
| 4 | 4 | 6 | ||||
| Rainy days | ||||||
| 14 | 15 | 16 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
August weather is still as good as in July. It’s getting colder in August. From +26°C in the day, the average maximum temperature lowers to +25°C. As August arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 121 mm to 120 mm. Humidity rises from 69% to 72%. Winds are calmer in comparison to July, going down from 2 m/s to 1 m/s on average. The amount of sunny days stay about the same, averaging 7 sunny days during the month.
Next month (September) brings a further decline in the weather.
Wind
The average wind speed is 2 m/s getting up to 6 m/s which is a medium breeze. You can feel it, especially getting out of the water.
The average wind speed in Basel is gradually decreasing during August, going from 3 m/s to 2 m/s over the course of the month.
Rain
How was the weather last August in Basel?
Climate Change over Years
The climate in Basel in August has not changed much over the last 43 years.
The average temperature was the lowest in 1980 (+14°C) and the highest in 2022 (+18°C). The driest year was 1991 with only 753 mm of rainfall, and the wettest year was 2016 with 1490 mm.
FAQ
Is August a good time to visit Basel?
Can you sunbathe in Basel in August?
Is Basel rainy in August?
Is it sunny in Basel in August?
Other cities in Switzerland
Monthly weather in Basel
Source of the data
For this page, we’ve looked at the typical weather in Basel, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.