Grilly Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Grilly.
Climate overview of Grilly
Temperatures in Grilly, Rhône-Alps, France, vary greatly throughout the year. July is the hottest month at 24°C (75°F), while January is the coldest at 5°C (41°F).
The city has a wet climate, receiving around 1630 mm (64 in) of rain/snowfall per year. Despite the high annual total, it has warm summers and cold winters. December is the wettest month. The most sunshine falls in July, with an average of 8.9 hours of daily sunshine.
Grilly Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Grilly - and find the best time to visit.
Monthly Temperature in Grilly
The climate in Grilly is known for significant temperature differences throughout the year, making the weather dynamic. On average, daytime temperatures range from a comfortable 24°C (75°F) in July to a chilly 5°C (41°F) in January.
Nighttime temperatures range from 14°C (57°F) in July to -2°C (28°F) in January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Grilly
Grilly has a notably wet climate with abundant precipitation, recording 1630 mm (64 in) of rain/snowfall per year. The wettest period in Grilly occurs in December, which receives around 153 mm (6 in) of precipitation. During the driest month, March, Grilly experiences high rainfall, totaling 124 mm (4.9 in). The consistent precipitation levels throughout the year contribute to a relatively stable climate. For more details, please visit our Grilly Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Grilly
In Grilly, summer days are longer and more sunny, with daily sunshine hours peaking at 8.9 hours in July. As the darker season arrives, the brightness of the sun becomes less. December sees a soft sun for only 1.6 hours per average day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Water Temperature in Grilly
The mean water temperature over the year ranges from 6°C (43°F) in January to 23°C (73°F) in August.
Water temperature over the year
Humidity in Grilly by Month
The relative humidity is high throughout the year in Grilly.
The city experiences its highest humidity in December, reaching 82%. In April, the humidity drops to its lowest level at 64%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit Grilly
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: June, July, August and September
- Warmest weather: July and August
- Most sunshine: July
- Best for swimming: June, July, August and September.
- Seasonal pattern: Warm summers and cold winters
- Coldest conditions: January, with freezing nights around -2°C (28°F).
Frequently asked questions about the climate in Grilly
What is the best time to visit Grilly?
June, July, August and September typically offer the most optimal weather in Grilly. In contrast, January, February, March, November and December tend to have less optimal conditions. Grilly has warm summers and cold winters.
What temperatures can I expect in Grilly?
Daytime highs range from 5°C (41°F) in January to 24°C (75°F) in July. Nighttime lows range from -2°C (28°F) to 14°C (57°F). Temperatures vary considerably through the year.
How much rain does Grilly get?
Annual rainfall is around 1630 mm (64 in). December is the wettest month with 153 mm (6 in), while March is the driest with 124 mm (4.9 in). In the coldest months, precipitation may fall as snow/rain.
How sunny is Grilly?
Grilly receives around 1,883 hours of sunshine per year. July is the sunniest month with 267 hours, while December is the cloudiest with just 47 hours.
Grilly 3-Day Forecast
Grilly 3-Day Forecast
Grilly on the map
Grilly is highlighted - select any city to see its climate.
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