Siouville Temperature by Month

Siouville in Lower Normandy, France sees moderate seasonal temperature shifts, with daytime highs between 10°C (50°F) in February and 20°C (68°F) in August, averaging 15°C (59°F) annually. Explore the full monthly breakdown below.

The weather in Siouville changes moderately throughout the year, offering enough variation to appreciate each season. Nights are cooler, with lows ranging from 16°C (61°F) to 6°C (43°F).

The chart below illustrates the average maximum day and minimum night temperatures in Siouville by month:

The coldest point of the day usually falls between 4 AM and 6 AM, with temperatures peaking around 3 PM. August, the city's warmest month, gets 210 hours of sunshine.

The chart below shows the average temperature throughout the year:

Siouville'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:

Athens, Greece sits at 23°C (73°F) on average, with hot dry summers and mild winters characteristic of the Mediterranean.

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

Osaka, Japan averages 22°C (72°F) annually, with hot humid summers, mild winters, and pleasant spring and autumn seasons.

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.

Seasonal temperature shifts influence more than just how warm it feels, they also drive changes in rainfall, cloud cover, and wind patterns throughout the year.

Warmer air holds more moisture, which tends to mean heavier or more frequent rain during the warmer months. When temperatures drop in winter, any precipitation that does fall is more likely to come as snow or sleet, though in Siouville this rarely lasts long on the ground.

For more on Siouville's weather, including monthly rainfall, sunshine hours, and humidity, visit our Siouville climate page.