Saint-Cast-le-Guildo Weather & Climate: Best Time to Visit

Average temperatures, rainfall, sunshine and the best time to visit Saint-Cast-le-Guildo.

Current conditions Saint-Cast-le-Guildo  

Climate overview of 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.

Saint-Cast-le-Guildo Weather by Month

Pick a month to see the average temperature, rainfall and sunshine in Saint-Cast-le-Guildo - and find the best time to visit.

Monthly Temperature in Saint-Cast-le-Guildo

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.

Temperature ranges by month

Rainfall in Saint-Cast-le-Guildo

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.

The mean monthly precipitation over the year, including rain, hail, and snow

Sunshine Hours in Saint-Cast-le-Guildo

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.

Monthly hours of sunshine

Data from: Saint Malo, France (17 KM, 11 Miles).

Daily hours of sunshine

Data from: Saint Malo, France (17 KM, 11 Miles).

Humidity in Saint-Cast-le-Guildo by Month

Best Time to Visit Saint-Cast-le-Guildo

The most comfortable overall weather for exploring Saint-Cast-le-Guildo is usually found in June, July, August and September. Conditions are generally least comfortable in January.

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, August and September
  • Most sunshine: June, July and August
  • Fewest rainy days: June, July, August and September
  • Seasonal pattern: Pleasant summers and cold winters

Frequently asked questions about the climate in Saint-Cast-le-Guildo

What is the best time to visit Saint-Cast-le-Guildo?

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.

What temperatures can I expect in Saint-Cast-le-Guildo?

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.

How much rain does Saint-Cast-le-Guildo get?

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).

How sunny is Saint-Cast-le-Guildo?

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.

Saint-Cast-le-Guildo 3-Day Forecast

Saint-Cast-le-Guildo on the map

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