The climate of Grenoble is temperate, with quite cold winters and warm summers.
The city is located 200 meters (650 feet) above sea level, at the foot of the Alps, in a Y-shaped valley. The configuration in a relatively closed valley entails that it can snow in winter, while there can be very hot days in summer.
The lowest record is -27 °C (-16.5 °F), recorded in January 1971. The highest record is 39.5 °C (103 °F), recorded in August 2003.
The average temperature of the coldest month (January) is of 2.4 °C (36 °F), that of the warmest month (July) is of 20.6 °C (69 °F). Here are the average temperatures.
Grenoble - Average temperatures
Min (°C)-1024912141411830
Max (°C)681215202427262217106
Min (°F)303236394854575752463732
Max (°F)434654596875817972635043

Precipitation amounts to 935 millimeters (36.8 inches) per year: so, it is at an intermediate level. It ranges from 50 mm (2 in) in the driest month (February) to 105 mm (4.1 in) in the wettest ones (May, September, October). Here is the average precipitation.
Grenoble - Average precipitation

On average, there are around 2,070 sunshine hours per year. Here are the average sunshine hours per day.
Grenoble - Sunshine


Best Time

The best time to visit Grenoble runs from mid-May to mid-September, since it is the warmest and sunniest period of the year. Sometimes, it can be hot in July and August, while in other circumstances, nights can be cool or even a little cold even in these months, so it can be useful to bring a sweatshirt or sweater and a light jacket for the evening.