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Average temperatures, rainfall, sunshine and the best time to visit Saint-Cast-le-Guildo.
Saint-Cast-le-Guildo, Brittany, France, experiences significant temperature variation throughout the year. Summers bring daytime highs of 22°C (72°F) in August, while winters cool to 10°C (50°F) in January.
Annual rainfall is moderate at around 867 mm (34 in), with December being the wettest month. The city also has pleasant summers and cold winters. The sunniest month is June, with 6.9 hours of sunshine per day on average.
Pick a month to see the average temperature, rainfall and sunshine in Saint-Cast-le-Guildo - and find the best time to visit.
Depending on the time of the year, temperatures range from pleasant to chilly in Saint-Cast-le-Guildo. Average daytime temperatures reach a pleasant 22°C (72°F) in August. In January, the coolest month of the year, temperatures drop to a chilly 10°C (50°F).
At night, temperatures range from around 15°C (59°F) in August to 5°C (41°F) in January.
Check out our detailed temperature page for more information.
Generally, Saint-Cast-le-Guildo has a moderate amount of precipitation, averaging 867 mm (34 in) of rainfall annually. Saint-Cast-le-Guildo experiences moderate seasonal variation in rainfall, with monthly averages ranging from 96 mm (3.8 in) in December, the wettest month, and 53 mm (2.1 in) in July, the driest month. For more details, please visit our Saint-Cast-le-Guildo Precipitation page.
Saint-Cast-le-Guildo can be enjoyed more throughout the sunniest month of June under a blue sky, with approximately 6.9 hours of sunshine daily. In contrast, the city experiences much darker days in December, with only 2.2 hours of sunlight per day.
Visit our detailed sunshine hours page for more information.
The city experiences its highest humidity in October, reaching 85%. In March, the humidity drops to its lowest level at 78%. What does this mean? Read our detailed page on humidity levels for further details.
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
June, July, August and September typically offer the most optimal weather in Saint-Cast-le-Guildo. In contrast, January tends to have less optimal conditions. Saint-Cast-le-Guildo has pleasant summers and cold winters.
Daytime highs range from 10°C (50°F) in January to 22°C (72°F) in August. Nighttime lows range from 5°C (41°F) to 15°C (59°F). Temperatures vary considerably through the year.
Annual rainfall is around 867 mm (34 in). December is the wettest month with 96 mm (3.8 in), while July is the driest with 53 mm (2.1 in).
Saint-Cast-le-Guildo receives around 1,679 hours of sunshine per year. June is the sunniest month with 207 hours, while December is the cloudiest with just 66 hours.
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Where to go in September - average daytime high across popular destinations.
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