Guillac Weather & Climate: Best Time to Visit

Average temperatures, rainfall, sunshine and the best time to visit Guillac.

Current conditions Guillac  

Climate overview of Guillac

Temperatures in Guillac, Brittany, France, vary greatly throughout the year. July is the hottest month at 24°C (75°F), while January is the coldest at 10°C (50°F).

Annual rainfall is moderate at around 765 mm (30 in), with December being the wettest month. The city also has warm summers and cold winters. Sunshine peaks in June, when the city sees around 7.2 hours of sunshine per day.

Guillac Weather by Month

Pick a month to see the average temperature, rainfall and sunshine in Guillac - and find the best time to visit.

Monthly Temperature in Guillac

The climate in Guillac is known for significant temperature differences throughout the year, making the weather dynamic. Average daytime temperatures reach a comfortable 24°C (75°F) in July. In January, the coolest month of the year, temperatures drop to a chilly 10°C (50°F).

At night, temperatures range from around 14°C (57°F) in July to 3°C (37°F) in January.

Check out our detailed temperature page for more information.

Temperature ranges by month

Rainfall in Guillac

Generally, Guillac receives mid-range precipitation levels, with 765 mm (30 in) annually. Guillac experiences moderate seasonal variation in rainfall, with monthly averages ranging from 79 mm (3.1 in) in December, the wettest month, and 48 mm (1.9 in) in July, the driest month. For more details, please visit our Guillac Precipitation page.

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

Sunshine Hours in Guillac

Guillac can be enjoyed more throughout the sunniest month of June under a blue sky, with approximately 7.2 hours of sunshine daily. In contrast, the city experiences much darker days in December, with only 2.3 hours of sunlight per day.

Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Data from: Rennes, France (62 KM, 38 Miles).

Daily hours of sunshine

Data from: Rennes, France (62 KM, 38 Miles).

Humidity in Guillac by Month

Best Time to Visit Guillac

For comfortable weather, consider visiting Guillac in June, July, August and September. Conditions are usually least favourable in January and December.

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

Frequently asked questions about the climate in Guillac

What is the best time to visit Guillac?

June, July, August and September typically offer the most optimal weather in Guillac. In contrast, January and December tend to have less optimal conditions. Guillac has warm summers and cold winters.

What temperatures can I expect in Guillac?

Daytime highs range from 10°C (50°F) in January to 24°C (75°F) in July. Nighttime lows range from 3°C (37°F) to 14°C (57°F). Temperatures vary considerably through the year.

How much rain does Guillac get?

Annual rainfall is around 765 mm (30 in). December is the wettest month with 79 mm (3.1 in), while July is the driest with 48 mm (1.9 in).

How sunny is Guillac?

Guillac receives around 1,724 hours of sunshine per year. June is the sunniest month with 217 hours, while December is the cloudiest with just 68 hours.

Guillac 3-Day Forecast

Guillac on the map

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