Isigny-sur-Mer Temperature by Month

Isigny-sur-Mer in Lower Normandy, France sees significant seasonal temperature differences, with daytime highs between 10°C (50°F) in January and 22°C (72°F) in August, averaging 16°C (61°F) annually. Explore the full monthly breakdown below.

Visitors to Isigny-sur-Mer will encounter a climate influenced by big temperature differences across the year. Nighttime temperatures range from 15°C (59°F) in August to 4°C (39°F) in January.

The chart below illustrates the average maximum day and minimum night temperatures in Isigny-sur-Mer by month:

From around 4 AM to 6 AM temperatures are at their lowest; by 3 PM they've climbed to their daily peak. August, the warmest month, averages 210 hours of sunshine.

The chart below shows the average temperature throughout the year:

Isigny-sur-Mer's average annual maximum temperature is 16°C (61°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.

Glasgow, Scotland averages 13°C (55°F) a year, mild but often grey, with cold winters and rarely hot summers.

San Francisco, USA averages 19°C (66°F) annually, but with little seasonal variation, summers are often cool and foggy, winters mild.

Brisbane, Australia averages 26°C (79°F) a year, with warm winters and hot, humid summers.

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 Isigny-sur-Mer's weather, including monthly rainfall, sunshine hours, and humidity, visit our Isigny-sur-Mer climate page.