Roscoff Temperature by Month
The average annual maximum temperature in Roscoff, Brittany, France is 15°C (59°F), with daytime highs ranging from 11°C (52°F) in February to 19°C (66°F) in August. This page covers monthly averages, day-night differences, and how Roscoff compares to cities worldwide.
Roscoff Monthly Temperatures
In Roscoff, seasonal changes bring about a moderate variation in temperatures. Nighttime lows range from 15°C (59°F) in August to 7°C (45°F) in February.
The chart below illustrates the average maximum day and minimum night temperatures in Roscoff 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. August, the city's warmest month, averages 206 hours of sunshine.
The chart below shows the average temperature throughout the year:
Temperature: Roscoff 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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Roscoff vs World: Temperature Compared
Roscoff's average annual maximum temperature is 15°C (59°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.
Toronto, Canada averages 13°C (55°F) annually, with cold snowy winters balanced by genuinely warm summers.
Chicago, USA averages 15°C (59°F) annually — known for extreme seasonal swings, from bitterly cold winters to warm summers.
Melbourne, Australia averages 20°C (68°F) annually — known for unpredictable weather, with four seasons sometimes happening in one day.
What Does the Temperature Feel Like in Roscoff?
Temperature alone doesn't tell the whole story — humidity plays a big role in how warm or cold it actually feels. High humidity in summer makes the heat feel more intense, particularly once temperatures climb above 25°C. In winter, the same humidity can make cold air feel sharper than the thermometer suggests.
In the cooler months, when temperatures drop below 10°C, high humidity makes the cold feel more cutting than it would in dry conditions.
In Roscoff, February is the coolest month, with average highs of 11°C (52°F) and humidity around 84% — considered very high. For a full picture, see our humidity page.
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.
Whether a city sits on the coast or deep inland makes a significant difference to its climate. Coastal areas tend to have more stable temperatures year-round — large bodies of water absorb heat slowly in summer and release it gradually in winter, keeping extremes in check. Cities far from the sea don't benefit from that buffer, which is why continental climates tend to have hotter summers and colder winters than their coastal counterparts at the same latitude.
For more on Roscoff's weather — including monthly rainfall, sunshine hours, and humidity — visit our Roscoff climate page.
