Vannes Temperature by Month
The average annual maximum temperature in Vannes, Brittany, France is 17°C (63°F), with daytime highs ranging from 10°C (50°F) in February to 23°C (73°F) in August. This page covers monthly averages, day-night differences, and how Vannes compares to cities worldwide.
Vannes Monthly Temperatures
With significant temperature fluctuations, Vannes enjoys distinct seasons year-round. Nighttime lows range from 15°C (59°F) in August to 4°C (39°F) in February.
The chart below illustrates the average maximum day and minimum night temperatures in Vannes by month:
The coolest part of the day is typically between 4 AM and 6 AM, while 3 PM is usually the warmest, when solar heating is at its peak.
The chart below shows the average temperature throughout the year:
Temperature: Vannes vs France
The map below shows the annual temperature across France. You can also select individual months if you want to compare a specific time of year.
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Vannes vs World: Temperature Compared
Vannes's average annual maximum temperature is 17°C (63°F). To put that in context, here's how it compares to a few well-known destinations:
Lisbon, Portugal averages 21°C (70°F) annually — warm summers, mild winters, and rain mainly in the cooler months.
On the cooler end, Oslo, Norway averages just 10°C (50°F) annually, with pleasant summers but long, cold winters.
Seoul, South Korea averages 18°C (64°F) a year, with four clear seasons, cold winters, and hot humid summers.
Adelaide, Australia averages 21°C (70°F) a year, with warm summers, mild winters, and relatively low rainfall year-round.
Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.
The readings come from a range of sources — land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.
For cities and regions with significant elevation, altitude is one of the biggest factors shaping local temperatures. As a rule of thumb, temperatures fall by around 6°C for every 1,000 metres gained — so a city at 2,000 metres will typically be around 12°C cooler than a city at sea level in the same region. Higher ground also tends to see more dramatic day-to-night temperature swings, since thinner air loses heat faster after sunset.
For more on Vannes's weather — including monthly rainfall, sunshine hours, and humidity — visit our Vannes climate page.
