Roisan Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Roisan.
Climate overview of Roisan
The climate in Roisan, Valle d'Aosta, Italy, is marked by large temperature swings across the seasons, ranging from 17°C (63°F) in July to -5°C (23°F) in January.
With around 1300 mm (51 in) of annual rain/snowfall, Roisan has a notably wet climate. The wettest month is November. The sunniest month is July, with 9.2 hours of sunshine per day on average.
Roisan Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Roisan — and find the best time to visit.
Monthly Temperature in Roisan
In Roisan, temperatures differ significantly between summer and winter months. Average daytime temperatures reach a moderate 17°C (63°F) in July. In January, the coolest month of the year, temperatures drop to a very cold -5°C (23°F).
At night, temperatures range from around 7°C (45°F) in July to -13°C (9°F) in January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Roisan
Roisan experiences significant rain/snowfall throughout the year, averaging 1300 mm (51 in) of precipitation annually. Despite minor fluctuations, Roisan enjoys fairly consistent precipitation throughout the year. In November, you can expect around 132 mm (5.2 in) of precipitation, while in February, Roisan receives about 94 mm (3.7 in). For more details, please visit our Roisan 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 Roisan
Roisan can be enjoyed more throughout the sunniest month of July under a blue sky, with approximately 9.2 hours of sunshine daily. In contrast, the city experiences much darker days in January, with only 2.3 hours of sunlight per day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Best Time to Visit Roisan
Frequently asked questions about the climate in Roisan
What is the best time to visit Roisan?
August typically offers the most optimal weather in Roisan. In contrast, January, February, March, April, May, September, October, November and December tend to have less optimal conditions.
What temperatures can I expect in Roisan?
Daytime highs range from -5°C (23°F) in January to 17°C (63°F) in July. Nighttime lows range from -13°C (9°F) to 7°C (45°F). Temperatures vary considerably through the year.
How much rain does Roisan get?
Annual rainfall is around 1300 mm (51 in). November is the wettest month with 132 mm (5.2 in), while February is the driest with 94 mm (3.7 in). In the coldest months, precipitation may fall as snow.
How sunny is Roisan?
Roisan receives around 2,002 hours of sunshine per year. July is the sunniest month with 275 hours, while January is the cloudiest with just 70 hours. Overall, Roisan enjoys abundant sunshine.
Roisan 3-Day Forecast
Roisan 3-Day Forecast
Roisan on the map
Roisan is highlighted — select any city to see its climate.
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