Dinan

Brittany Weather in August

Average temperatures, rainfall, sunshine and the best places to visit in Brittany, France in August.

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Saint Malo Carnac Rennes Brest

Are you planning a trip a to Brittany, France in August and wondering what kind of weather to expect? This page has all the details you need.

What to Expect in Brittany in August

Brittany, France is a region in France. August in Brittany generally has temperatures that range from pleasant to warm, with moderate precipitation. The month of August is in the summer season.

Temperatures

Based on our climate data spanning from 1990-2020, the average maximum temperature is pleasant in Porspoder at 19°C (66°F) to warm in Varennes at 27°C (81°F). Nighttime temperatures generally drop to 15°C (59°F) in Varennes and 16°C (61°F) in Porspoder. On average, August is the month with the highest temperature of the year in Brittany, France.

For specific regional insights in Brittany, France, refer to the map provided below.

Precipitation

In August, precipitation varies across different areas. From moderate rainfall in Locmaria with an average of 46 mm (1.8 in) to moderate rainfall in Roz-sur-Couesnon with 70 mm (2.8 in).

Average sunshine

Sunshine is generally plentiful throughout many areas. Saint Malo enjoys about 199 hours of sunlight, ideal for those seeking sunny weather.

Explore Brittany by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Best Places to Visit in Brittany in August

Click on a destination dot for more details. Toggle the map to compare temperatures or precipitation across Brittany.

Conditions Temperatures Precipitation
perfect weather
pleasant
tolerable
unpleasant
poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

Popular Destinations in Brittany

What is the weather like in August for some of the most popular destinations in Brittany, France?

Temperature range in Brittany (August)

Precipitation variation in Brittany (August)

Saint Malo

In August Saint Malo generally has pleasant temperatures with maximum daytime temperatures around 22°C (72°F), minimum nighttime temperatures around 16°C (61°F) and moderate monthly rainfall. So on average the conditions are perfect that month.

« July
August
September »
July
August
September
Max temperature
21°C (70°F)
22°C (72°F)
20°C (68°F)
Min temperature
15°C (59°F)
16°C (61°F)
14°C (57°F)
Monthly sun hours
206 hours
199 hours
169 hours
Monthly rainfall
56 mm (2.2 in)
63 mm (2.5 in)
76 mm (3 in)
Monthly rainy days
10 days
12 days
13 days
Weather conditions
perfect
perfect
perfect
Climate in Saint Malo →

Carnac

In August Carnac generally has pleasant temperatures with maximum daytime temperatures around 22°C (72°F), minimum nighttime temperatures around 16°C (61°F) and moderate monthly rainfall. So on average the conditions are perfect that month.

« July
August
September »
July
August
September
Max temperature
22°C (72°F)
22°C (72°F)
20°C (68°F)
Min temperature
16°C (61°F)
16°C (61°F)
14°C (57°F)
Monthly rainfall
43 mm (1.7 in)
49 mm (1.9 in)
59 mm (2.3 in)
Monthly rainy days
11 days
13 days
14 days
Weather conditions
perfect
perfect
perfect
Climate in Carnac →

Rennes

In August Rennes generally has high temperatures with maximum daytime temperatures around 25°C (77°F), minimum nighttime temperatures around 14°C (57°F) and moderate monthly rainfall. So on average the conditions are perfect that month.

« July
August
September »
July
August
September
Max temperature
25°C (77°F)
25°C (77°F)
22°C (72°F)
Min temperature
14°C (57°F)
14°C (57°F)
11°C (52°F)
Monthly sun hours
212 hours
205 hours
177 hours
Monthly rainfall
53 mm (2.1 in)
54 mm (2.1 in)
57 mm (2.2 in)
Monthly rainy days
11 days
12 days
12 days
Weather conditions
perfect
perfect
perfect
Climate in Rennes →

Brest

In August Brest generally has pleasant temperatures with maximum daytime temperatures around 21°C (70°F), minimum nighttime temperatures around 14°C (57°F) and moderate monthly rainfall. So on average the conditions are perfect that month.

« July
August
September »
July
August
September
Max temperature
20°C (68°F)
21°C (70°F)
19°C (66°F)
Min temperature
14°C (57°F)
14°C (57°F)
13°C (55°F)
Monthly sun hours
229 hours
206 hours
168 hours
Monthly rainfall
56 mm (2.2 in)
63 mm (2.5 in)
64 mm (2.5 in)
Monthly rainy days
13 days
15 days
15 days
Weather conditions
perfect
perfect
pleasant
Climate in Brest →

Dinan

In August Dinan generally has high temperatures with maximum daytime temperatures around 24°C (75°F), minimum nighttime temperatures around 14°C (57°F) and moderate monthly rainfall. So on average the conditions are perfect that month.

« July
August
September »
July
August
September
Max temperature
23°C (73°F)
24°C (75°F)
21°C (70°F)
Min temperature
14°C (57°F)
14°C (57°F)
12°C (54°F)
Monthly sun hours
206 hours
199 hours
169 hours
Monthly rainfall
58 mm (2.3 in)
59 mm (2.3 in)
61 mm (2.4 in)
Monthly rainy days
11 days
12 days
13 days
Weather conditions
perfect
perfect
perfect
Climate in Dinan →

Is your destination not in the list? Have a look at all destinations in Brittany, in France.

In our records: France August extremes

Notable August records observed across cities in France in our climate database (1976 – 2026). Historic readings can vary in quality, so treat these as illustrative.

  • In our records, the warmest August day in France reached 43°C (109°F) in Carcassonne on August 23, 2023.

Popular cities in August

Day & night temperatures, rainfall and average weather in Brittany in August.

City Weather Day temp Night temp Rainfall
Saint Malo 22°C (72°F) 16°C (61°F) 63 mm (2.5 in)
Carnac 22°C (72°F) 16°C (61°F) 49 mm (1.9 in)
Rennes 25°C (77°F) 14°C (57°F) 54 mm (2.1 in)
Brest 21°C (70°F) 14°C (57°F) 63 mm (2.5 in)
Dinan 24°C (75°F) 14°C (57°F) 59 mm (2.3 in)
Perros-Guirec 20°C (68°F) 15°C (59°F) 56 mm (2.2 in)

Brittany weather in August: frequently asked questions

What is the weather like in Brittany, France in August?

Expect perfect weather across Brittany, France in August. The popular destination of Saint Malo averages 22°C (72°F) by day and 16°C (61°F) at night during this summer month.

What is the average temperature in Brittany, France in August?

In Saint Malo, the average daytime high in August is 22°C (72°F), while nighttime temperatures drop to around 16°C (61°F).

Does Brittany, France get a lot of rain in August?

August is on the drier side in Brittany, France. Saint Malo averages only about 63 mm (2.5 in), with most days staying dry.

Is August a Good Time to Visit Brittany, France?

We believe that August is one of the best times to visit Brittany, France with overall perfect weather in Saint Malo. However, the weather conditions may vary depending on your destination.

Generally speaking, July, August and September provide perfect weather in Saint Malo. On the other hand, the weather in January and December tend to be poor.

Interested in more climate information?

We have much more information about the climate in Brittany.

Weather and climate has detailed information for every country in the world. Are you going to France? Get detailed historical weather averages for many cities in France.

Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.

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