Romans-sur-Isère Temperature by Month

Romans-sur-Isère in Rhône-Alps, France sees significant seasonal temperature differences, with daytime highs between 8°C (46°F) in January and 29°C (84°F) in July, averaging 18°C (64°F) annually. Explore the full monthly breakdown below.

Visitors to Romans-sur-Isère can expect significant temperature changes throughout the year. Nighttime temperatures also vary widely, ranging from 16°C (61°F) in July to 0°C (32°F) in January.

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

Low temperatures are most often recorded between 4 AM and 6 AM, while highs typically occur around 3 PM. July, the city's warmest month, sees 288 hours of sunshine.

The chart below shows the average temperature throughout the year:

Romans-sur-Isère's average annual maximum temperature is 18°C (64°F). To put that in context, here's how it compares to a few well-known destinations:

Barcelona, Spain has an annual average of around 21°C (70°F), with warm summers and mild, fairly short winters.

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.

Perth, Australia averages 25°C (77°F) annually, with a classic Mediterranean climate, hot dry summers and mild wet winters.

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 Romans-sur-Isère, January is the coolest month, with average highs of 8°C (46°F) and humidity around 83%, considered very high. In July, the warmest month, temperatures average 29°C (84°F) with 70% humidity, conditions that feel 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.

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