Saint-Jean-le-Thomas Temperature by Month

Saint-Jean-le-Thomas in Lower Normandy, France sees significant seasonal temperature differences, with daytime highs between 10°C (50°F) in January and 21°C (70°F) in August, averaging 15°C (59°F) annually. Explore the full monthly breakdown below.

With significant temperature fluctuations, Saint-Jean-le-Thomas enjoys distinct seasons year-round. Nighttime lows range from 16°C (61°F) in August to 5°C (41°F) in January.

The chart below illustrates the average maximum day and minimum night temperatures in Saint-Jean-le-Thomas by month:

The minimum temperature is often recorded between 4 AM and 6 AM, while the highest temperature is usually reached at 3 PM, when the sun's heating effect is strongest. August, the warmest month, gets 199 hours of sunshine.

The chart below shows the average temperature throughout the year:

Saint-Jean-le-Thomas'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.

On the cooler end, Oslo, Norway averages just 10°C (50°F) annually, with pleasant summers but long, cold winters.

Boston, USA averages 16°C (61°F) annually, with four distinct seasons and cold winters that rival northern Europe.

Tokyo, Japan averages 21°C (70°F) a year, with hot summers, cool winters, and a well-defined cherry blossom spring.

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 Saint-Jean-le-Thomas, January is the coolest month, with average highs of 10°C (50°F) and humidity around 83%, 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 Saint-Jean-le-Thomas's weather, including monthly rainfall, sunshine hours, and humidity, visit our Saint-Jean-le-Thomas climate page.