Weather in Grenoble in August 2025
Average weather
Average temperature in Grenoble 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 +28°C.
The average maximum temperature goes down 4% by the end of the month, compared with the beginning of the month, from +25°C to +24°C.
Is Grenoble warm or cold in August?
Grenoble is typically warm in August.
Maximum temperatures go down compared to the previous month from +28°C to +27°C. The minimum temperature also goes down from +17°C to +16°C.
It’s generally warm, but pack a long-sleeve shirt for evenings.
August is one of the warmest months in Grenoble, here is the comparison with other months:
Climate in Grenoble in August
| July | August | September | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +28°C | +27°C | +23°C | ||||
| Min. temperature | ||||||
| +9°C | +8°C | +4°C | ||||
| Max. temperature | ||||||
| +38°C | +39°C | +34°C | ||||
| Rainfall | ||||||
| 95 mm | 96 mm | 102 mm | ||||
| Wind | ||||||
| 1 m/s | 1 m/s | 1 m/s | ||||
| Humidity | ||||||
| 71% | 73% | 78% | ||||
| Air pressure | ||||||
| 1016 HPa | 1016 HPa | 1017 HPa | ||||
| Sunny days | ||||||
| 8 | 8 | 6 | ||||
| Cloudy days | ||||||
| 7 | 8 | 10 | ||||
| Rainy days | ||||||
| 16 | 16 | 14 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
August weather is still as good as in July. It’s getting colder in August. From +28°C in the day, the average maximum temperature lowers to +27°C. Prepare for more rain. Average rainfall goes from 95 mm to 96 mm. Humidity rises from 71% to 73%. The average wind speed doesn’t change much during August, staying around 1 m/s. The amount of sunny days stay about the same, averaging 8 sunny days during the month.
Next month (September) brings a further decline in the weather.
Wind
The average wind speed is 1 m/s getting up to 3 m/s which is a light breeze; barely moving the tree leaves.
The average wind speed in Grenoble is gradually increasing during August, going from 1 m/s to 1 m/s over the course of the month.
Rain
How was the weather last August in Grenoble?
Climate Change over Years
The climate in Grenoble in August has not changed much over the last 43 years.
The average temperature was the lowest in 1980 (+15°C) and the highest in 2022 (+20°C). The driest year was 1989 with only 836 mm of rainfall, and the wettest year was 2023 with 2113 mm.
FAQ
Is August a good time to visit Grenoble?
Can you sunbathe in Grenoble in August?
Is Grenoble rainy in August?
Is it sunny in Grenoble in August?
Other cities in France
Monthly weather in Grenoble
Source of the data
For this page, we’ve looked at the typical weather in Grenoble, 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.